Union-wide
Cross-cutting themes
Community-led
Inter- and Transdisciplinary Sessions
Disciplinary sessions

CL – Climate: Past, Present & Future

Programme Group Chair: Kerstin Treydte

MAL13-CL
Hans Oeschger Medal Lecture by Michael Sigl
Convener: Kerstin Treydte
Abstract
| Thu, 18 Apr, 19:00–20:00 (CEST)
 
Room F1
Thu, 19:00
MAL14-CL
Milutin Milankovic Medal Lecture by Peter U. Clark
Convener: Kerstin Treydte
Abstract
| Mon, 15 Apr, 16:15–17:15 (CEST)
 
Room F1
Mon, 16:15
MAL36-CL
CL Division Outstanding ECS Award Lecture by Maria A. A. Rugenstein
Convener: Kerstin Treydte
Abstract
| Thu, 18 Apr, 10:50–11:20 (CEST)
 
Room F1
Thu, 10:50
DM3
Division meeting for Climate: Past, Present & Future (CL)
Convener: Kerstin Treydte
Tue, 16 Apr, 12:45–13:45 (CEST)
 
Room F1
Tue, 12:45

CL0.1 – Inter- and Transdisciplinary Sessions

Sub-Programme Group Scientific Officers: Irka Hajdas, Kerstin Treydte

ITS2.3/CL0.1.1 EDI

High-impact climate and weather events typically result from the interaction of multiple climate and weather drivers, as well as vulnerability and exposure, across various spatial and temporal scales. Such compound events often cause more severe socio-economic impacts than single-hazard events, rendering traditional univariate extreme event analyses and risk assessment techniques insufficient. It is, therefore, crucial to develop new methodologies that account for the possible interaction of multiple physical and societal drivers when analysing high-impact events under present and future conditions. Despite the considerable attention from the scientific community and stakeholders in recent years, several challenges and topics must still be addressed comprehensively.


These include: (1) identifying the compounding drivers, including physical drivers (e.g., modes of variability) and/or drivers of vulnerability and exposure, of the most impactful events; (2) Developing methods for defining compound event boundaries, i.e. legitimate the ‘cut-offs’ in the considered number of hazard types to ultimately disentangle enough information for decision-making; (3) Understanding whether and how often novel compound events, including record-shattering events, will emerge in the future; (4) Explicitly addressing and communicating uncertainties in present-day and future assessments (e.g., via climate storylines/scenarios); (5) Disentangling the contribution of climate change in recently observed events and future projections; (6) Employing novel Single Model Initial-condition Large Ensemble simulations from climate models, which provide hundreds to thousands of years of weather, to better study compound events. (7) Developing novel statistical methods (e.g., machine learning, artificial intelligence, and climate model emulators) for compound events; (8) Assessing the weather forecast skill for compound events at different temporal scales; (9) Evaluating the performance of novel statistical methods, climate and impact models, in representing compound events and developing novel methods for reducing uncertainties (e.g., multivariate bias correction and emergent constraints); and (10) engaging with stakeholders to ensure the relevance of the aforementioned analyses.


We invite presentations considering all aspects of compound events, including but not limited to the topics and research challenges described above.

Convener: Emanuele BevacquaECSECS | Co-conveners: Zengchao Hao, Pauline RivoireECSECS, Wiebke JägerECSECS, Seth Westra
Orals
| Fri, 19 Apr, 08:30–12:30 (CEST), 14:00–15:45 (CEST)
 
Room 2.24
Posters on site
| Attendance Fri, 19 Apr, 16:15–18:00 (CEST) | Display Fri, 19 Apr, 14:00–18:00
 
Hall X5
Posters virtual
| Fri, 19 Apr, 14:00–15:45 (CEST) | Display Fri, 19 Apr, 08:30–18:00
 
vHall X5
Orals |
Fri, 08:30
Fri, 16:15
Fri, 14:00
ITS2.1/CL0.1.2 EDI

The life evolution history on earth is closely intertwined with the multiple stressors within the ever-changing climate system. Ranging from large-timescale oscillations associated with orbital cycles and the glacial-interglacial transitions to regionalized extreme events, a wide range of climatic fluctuations in the past may have contributed to shaping the distribution and evolution of various life forms in the terrestrial environment. The recent developments in observational and coupled climate-ecological modelling approaches have provided a better understanding on the past climate impacts on the evolution of life. However, few occasions have allowed for a general bridge across these fields. Integrating multi-dimensional scientific approaches will provide us with a deeper understanding on the complex climate-ecological interactions and evolution in the past, throwing light into the potential ecological impacts of future climate change.

This session aims at bringing together multidisciplinary research addressing the climate-ecological interactions in the past, present and future, combining observational techniques/methods and ecosystem modelling. We welcome all kind of research contributions in this context and the topics of interests include,

- Past climate change and mass extinctions
- Global biodiversity patterns
- Chemical analyses on the geological materials (teeth, bone collagen, guano/feces, middens, sediment cores
- Geochemical mapping and dietary reconstructions across food webs
- DNA extraction, and taxonomic profiling of microorganisms
- Vegetation dynamics
- Climate and biome modelling
- Species adaptations and ecological strategies
- Genetic diversification and speciation
- Vulnerability and extinction risk, under anthropogenic warming and land use change.

We hope that through this session, individuals can discover new methodologies, applications and collaborations within their research areas that would help push science forward.

Convener: Thushara VenugopalECSECS | Co-conveners: Daniel ClearyECSECS, Jiaoyang Ruan, Deming Yang, Hae-Li ParkECSECS, Valentina Vanghi, Sayak BasuECSECS
Orals
| Tue, 16 Apr, 10:45–12:30 (CEST)
 
Room 2.24
Posters on site
| Attendance Tue, 16 Apr, 16:15–18:00 (CEST) | Display Tue, 16 Apr, 14:00–18:00
 
Hall X5
Posters virtual
| Tue, 16 Apr, 14:00–15:45 (CEST) | Display Tue, 16 Apr, 08:30–18:00
 
vHall X5
Orals |
Tue, 10:45
Tue, 16:15
Tue, 14:00
ITS2.12/CL0.1.4 EDI | PICO

The interconnection between climate, environment, and health is evident, with climate change posing significant threats to human welfare. As global temperature rise, extreme weather events such as heatwaves, floods, hurricanes, and droughts, directly and indirectly impact public health, alongside environmental exposures like air pollution. Climate and land use changes can influence the spread of vector-borne diseases such as malaria and increase the risk of waterborne illnesses. Additionally, climate change may result in severe wildfires and episodes of air pollution.

Addressing these complex challenges requires fostering interdisciplinary collaboration among climate researchers, epidemiologists, public health researchers, and social scientists, which is the primary focus of this session. The goal is to create a platform for presenting the latest innovations in using remote sensing and other large datasets to characterize exposures relevant to human health, especially in data-limited regions. The session encompasses various topics, including satellite data applications in human health, planetary epidemiology, risk mapping of infectious diseases, exposure mapping of heat and air pollution to quantify their impacts on human health, health co-benefits of mitigation actions, and the use of machine learning and AI for climate and health applications. The session emphasizes the examination of historical exposure-health outcome relationships, forecasts for the near future, and changes under progressive climate change.

Convener: Sourangsu ChowdhuryECSECS | Co-conveners: Irena Kaspar-Ott, Sagnik Dey, R. Sari Kovats, Claudia Di Napoli, Elke Hertig, Ricardo Trigo
PICO
| Tue, 16 Apr, 08:30–12:30 (CEST)
 
PICO spot 2
Tue, 08:30
ITS4.1/CL0.1.7 EDI

Recent assessments on the integrity of the Earth system and planetary health recognize the deteriorating resilience of the Earth system, with planetary-scale human impacts leading to increasing transgression of planetary boundaries constituting a new geological epoch: the Anthropocene (Richardson et al., Science Advances, 2023). Earth resilience, the capacity of the Earth system to resist, recover and regenerate from anthropogenic pressures, critically depends on the nonlinear interplay of positive and negative feedbacks of biophysical and increasingly also socio-economic processes and human-Earth system interactions. These include dynamics and interactions between the carbon cycle, the atmosphere, oceans, large-scale ecosystems, and the cryosphere, as well as the dynamics and perturbations associated with human activities. Studying Earth resilience requires a deeply integrated perspective on the human-Earth system in the Anthropocene and, hence, strong collaboration between diverse subdisciplines of Earth system science.

With rising anthropogenic pressures, there is an increasing risk of the human-Earth system hitting the ceiling of some of the self-regulating feedbacks of the Earth System, and of crossing tipping points in the large ice sheets, atmosphere-ocean circulation systems (e.g. the Atlantic Meridional Overturning Circulation) and biomes such as the Amazon rainforest. Transgressing these critical thresholds in human pressures such as greenhouse gas emissions and land-use changes could trigger large-scale and often abrupt and irreversible impacts on the biosphere and the livelihoods of millions of people. Potential domino effects or tipping cascades could arise due to the interactions between these tipping elements and lead to a further decline of Earth resilience. At the same time, there is growing evidence supporting the potential of positive (social) tipping points that could propel rapid decarbonization and transformative change towards global sustainability.

In this session, we invite contributions on all topics relating to Earth resilience, tipping points in the Earth system, planetary boundaries, positive (social) tipping, as well as their interactions and potential cascading domino effects. We are particularly interested in diverse methodological and quantitative approaches, from Earth system modelling to conceptual modelling and data analysis of nonlinearities, tipping points and abrupt shifts in the Earth system.

Convener: Jonathan Donges | Co-conveners: Ricarda Winkelmann, David Armstrong McKayECSECS, Marina Hirota, Lan Wang-ErlandssonECSECS, Simon Felix FahrländerECSECS, Johan Rockström
Orals
| Tue, 16 Apr, 08:30–12:15 (CEST), 14:00–15:30 (CEST)
 
Room N2
Posters on site
| Attendance Mon, 15 Apr, 16:15–18:00 (CEST) | Display Mon, 15 Apr, 14:00–18:00
 
Hall X5
Orals |
Tue, 08:30
Mon, 16:15
ITS1.10/CL0.1.9 EDI

The Coupled Model Intercomparison Project (CMIP) advances climate system understanding, but Earth System Models (ESM) exhibit disparities, particularly in responses to forcings and system coupling. As the IPCC relies on CMIP to provide information for policy decisions, a multidisciplinary approach is crucial to address uncertainties across the full CMIP production line. This session invites studies on climate forcings, climate responses, uncertainties in forcing agents, and model disparities in CMIP projections.

We welcome diverse climate-forcing research, including historical and future, anthropogenic and natural forcing development, idealized Earth System Model studies, observational evaluations, and works spanning all climate system components. Topics may include identifying disparities in CMIP ESMs, quantifying uncertainties, and addressing key scientific priorities for future model development. Contributions on opportunities, challenges, and constraints in using CMIP output for impact research, especially at regional scales, are encouraged.
This session ultimately aims at fostering collaboration among climate scientists, observationalists and modelers to address climate change challenges. Convened by WCRP CMIP Forcing Task Team and Fresh Eyes on CMIP, it aims to enhance understanding of CMIP uncertainties and prepare for CMIP6Plus and CMIP7 climate-forcing datasets.

AGU and WMO
Convener: Lina TeckentrupECSECS | Co-conveners: Thomas AubryECSECS, Michaela I. Hegglin, Yiwen LiECSECS, Camilla MathisonECSECS, Julia MindlinECSECS, Alexander J. WinklerECSECS
Orals
| Wed, 17 Apr, 14:00–18:00 (CEST)
 
Room N2
Posters on site
| Attendance Wed, 17 Apr, 10:45–12:30 (CEST) | Display Wed, 17 Apr, 08:30–12:30
 
Hall X5
Orals |
Wed, 14:00
Wed, 10:45
ITS2.9/CL0.1.10 EDI

Climate change may regionally intensify the threat posed by future floods to societies. The space-time dynamics of floods are controlled by atmospheric, catchment, riverine and anthropogenic processes, and their interactions. From a global change perspective, Holocene and historical floods and their spatial and temporal patterns are of particular interest because they can be linked to former climate patterns, a proxy for future climate predictions. Millennial and centennial time series include the very rare extreme events, which are often considered by society as 'unprecedented'. By understanding their timing, magnitude and frequency in conjunction with prevailing climate regimes and human activities, we can overcome our lack of information and disentangle the so-called “unknown unknowns”. The reconstruction and modelling of space-time flood patterns, related atmospheric variability and flood propagation in river basins under different environmental settings are the foci of this session supported by the PAGES Floods Working Group. Flood-prone areas are, in many regions, hotspots of economic, social, and cultural development. Hence, the historical role of human action in altering flood frequencies, hydro-sedimentary, and environmental processes is a priority topic. The session will further stimulate scientific discussion on detection and attribution of flood risk change.
We welcome interdisciplinary contributions using natural and documentary archives, instrumental data, and model reconstructions, which:
i) provide knowledge from short-term to long-term development of cultural river-landscapes and human-environmental interaction,
ii) reconstruct and model temporal and spatial flood patterns related to climate variability and change, including long-term changes in rainfall patterns,
iii) analyse the role of catchment conditions in shaping flood patterns,
iv) develop (supra-) regional historical maps of extreme floods (MEF),
v) highlight historical risk mitigation strategies of local communities and assess the flood risk of cultural heritage sites,
vi) collect evidence of the Anthropocene in floodplains and wetlands,
vii) detect changes in flood exposure and vulnerability.
The interdisciplinary integration of information is critical for the provision of robust data sets and baseline information for future flood risk scenarios, impacts, adaptation and mitigation strategies, and integrated river management.

Co-organized by HS12
Convener: Lothar Schulte | Co-conveners: Dominik PaprotnyECSECS, Thomas RoggenkampECSECS, Daniela Kroehling, Juan Antonio Ballesteros-Canovas, Miriam BertolaECSECS, Larisa Tarasova
Orals
| Tue, 16 Apr, 16:15–18:00 (CEST)
 
Room 2.24
Posters on site
| Attendance Tue, 16 Apr, 10:45–12:30 (CEST) | Display Tue, 16 Apr, 08:30–12:30
 
Hall X5
Posters virtual
| Tue, 16 Apr, 14:00–15:45 (CEST) | Display Tue, 16 Apr, 08:30–18:00
 
vHall X5
Orals |
Tue, 16:15
Tue, 10:45
Tue, 14:00
ITS5.12/CL0.1.11 EDI

Coastal zones are of high ecological and recreational value. At the same time, they are heavily impacted by a combination of natural and anthropogenic drivers of change, such as drainage, nutrient pollution, land use and fishing. This interdisciplinary session combines studies of the interrelationship of climate and other drivers of change on coastal processes (former ITS5.12), including biogeochemical cycling (former BG4.3), and nature-based solutions to manage these coastal socio-ecological systems (former ITS4.7).

Convener: Maren Voss | Co-conveners: Marcus Reckermann, Timothy Stojanovic, Eleonora GioiaECSECS, Fereidoun Rezanezhad, Sara E. Anthony, Eva EhrnstenECSECS
Orals
| Wed, 17 Apr, 16:15–18:00 (CEST)
 
Room 2.24
Posters on site
| Attendance Wed, 17 Apr, 10:45–12:30 (CEST) | Display Wed, 17 Apr, 08:30–12:30
 
Hall X5
Posters virtual
| Wed, 17 Apr, 14:00–15:45 (CEST) | Display Wed, 17 Apr, 08:30–18:00
 
vHall X5
Orals |
Wed, 16:15
Wed, 10:45
Wed, 14:00
ITS4.18/CL0.1.12 EDI | PICO

Water and climate-related risks, including changing rainfall patterns and an increase in extreme events such as floods, droughts, heatwaves, and fires, pose significant challenges to various sectors of society. In order to mitigate these risks and support adaptive planning and management, the development and provision of hydroclimatic information services play a crucial role. Water and climate information services (WCISs) have potential to reduce the impacts of water and climate-related risks by providing timely and accurate information in advance. As a result, substantial resources and research efforts have been dedicated to the development of global and regional WCISs. These services encompass a wide range of initiatives, from the establishment of natural hazard early warning systems (EWSs) to the creation of platforms and dashboards that support decision-making in sectors such as agriculture, tourism, and transportation.
The session aims to provide a platform for showcasing the current developments in WCIS for adaptation planning and management. The session will cover various topics with diverse applications, including the development of natural hazard EWSs, the creation of tools and dashboards for forecasting extreme weather events, and the facilitation of WCIS for sector-specific decision-making processes. Contributions related to co-designing of WCIS, the involvement of stakeholders in the development of WCIS, and innovative applications of WCIS for adaptation planning and management are also encouraged. This session will facilitate the exchange of knowledge and expertise among scientists, practitioners, and users of WCISs.

Public information:

This session consists of diverse climate information services (CIS) that have been developed worldwide. The themes include training and co-develop CIS and developing CIS for agriculture, water resources, and extreme events. 

Convener: Samuel Jonson Sutanto | Co-conveners: Biljana Basarin, Spyros PaparrizosECSECS, Gordana Kranjac-Berisavljevic, Moriom Akter MousumiECSECS
PICO
| Thu, 18 Apr, 16:15–18:00 (CEST)
 
PICO spot 1
Thu, 16:15
ITS3.11/CL0.1.13 EDI

Environmental issues are not only ecological but also social and cultural. To address them effectively, we need to understand how human societies interact with the environment. This session highlights the importance of social science in environmental research and vice versa, and invites contributions that explore how interdisciplinary collaboration can lead to innovative and sustainable solutions. We welcome researchers from various disciplines, such as environmental science, social science, data analysis, data providers and metadata specialists, to share their insights, case studies, and challenges. We aim to foster meaningful discussions and exchange of ideas across different perspectives and domains. By integrating the expertise of social scientists with environmental research and vice versa, we can develop a more comprehensive and holistic understanding of environmental problems and their solutions. Let's work together to contribute to a more sustainable relationship between humanity and the environment.
Topics may include, but are not limited to, the following:

– Air quality and climate indicator’s effects on urban citizens’s attitudes
– Climate action plans and solutions for green and sustainable cities
– Cultural heritage and environmental sustainability
– Environmental policy and governance
– Sustainable agriculture and land use
– Biodiversity conservation and ecosystem services
– Climate adaptation and resilience
– Citizen science and public engagement
– Project reports or infrastructure requirements related to multiiciplinary usecases

Convener: Hilde Orten | Co-conveners: Angeliki AdamakiECSECS, Hannah Clark, Claudio D'Onofrio
Orals
| Fri, 19 Apr, 14:00–15:45 (CEST), 16:15–18:00 (CEST)
 
Room N2
Posters on site
| Attendance Fri, 19 Apr, 10:45–12:30 (CEST) | Display Fri, 19 Apr, 08:30–12:30
 
Hall X5
Posters virtual
| Fri, 19 Apr, 14:00–15:45 (CEST) | Display Fri, 19 Apr, 08:30–18:00
 
vHall X5
Orals |
Fri, 14:00
Fri, 10:45
Fri, 14:00
ITS4.8/CL0.1.16 EDI

Climate change and environmental degradation constitute a growing threat to the stability of societal and economical systems. The observed increase in the frequency and intensity of extreme weather events combined with the projected long-term shifts in climate patterns and consequential impacts on biodiversity, have the potential to significantly affect the global economy. Consequently, the financial and insurance sectors could face substantial risks from these climate events unless effectively managed. This requires an accurate estimate of future climate risks, while understanding their complex and non-linear characteristics, and translating these impacts to a scale that is relevant and meaningful for society.

In recognition of this challenge climate risk assessments have experienced amplified attention in both the academic and private spheres, leading to initiatives such as the ‘Network for Greening the Financial Sector’ (NGFS) and the ‘Task Force on Climate-Related Financial Disclosure’ (TCFD). These initiatives aim at providing comprehensive climate impact information for the private sector and financial institutions which providing actionable information for understanding and managing climate risk.

Nevertheless, criticisms have emerged regarding the models' inadequacies in representing extreme events, the intricate nature of climate extremes characterized by their compounding and cascading effects, and the oversight of non-linearities associated with tipping elements in the climate system. These shortcomings suggest that current risk assessments may be overly conservative, missing the most impactful events.

Therefore, providing a platform to foster interactions between scientists, economists and financial experts is urgently needed. With the goal of facilitating such dialogue, this session aims at providing a platform for actors from academia and the private sector to exchange information on strategies for assessing climate risk. In particular, we are interested in submissions that focus on:

-Innovative climate risk modeling for
-Chronic and Acute Climate Risks
-Compound Events and Cascading Impacts
-Model Evaluation of Extreme weather events
-Bias adjustment Methods
-Downscaling Methods
-Construction of novel Climate Hazard Indicators and their projections for specific sectors (Food, Energy, Real Estate,...)
-Supply chains
-Impact Data Collection and Empirical Assessments
-Construction Derivation Damage functions
-Climate – Nature nexus

Convener: Kai KornhuberECSECS | Co-conveners: Andrej Ceglar, Nicola Ranger, Alessio CiulloECSECS, Maximilian KotzECSECS
Orals
| Wed, 17 Apr, 08:30–12:30 (CEST)
 
Room 2.17
Posters on site
| Attendance Wed, 17 Apr, 16:15–18:00 (CEST) | Display Wed, 17 Apr, 14:00–18:00
 
Hall X5
Orals |
Wed, 08:30
Wed, 16:15
ITS1.1/CL0.1.17 EDI

Machine learning (ML) is transforming data analysis and modelling of the Earth system. While statistical and data-driven models have been used for a long time, recent advances in ML and deep learning now allow for encoding non-linear, spatio-temporal relationships robustly without sacrificing interpretability. This has the potential to accelerate climate science through new approaches for modelling and understanding the climate system. For example, ML is now used in the detection and attribution of climate signals, to merge theory and Earth observations in innovative ways, and to directly learn predictive models from observations. The limitations of machine learning methods also need to be considered, such as requiring, in general, rather large training datasets, data leakage, and/or poor generalisation abilities so that methods are applied where they are fit for purpose and add value.

This session aims to provide a venue to present the latest progress in the use of ML applied to all aspects of climate science, and we welcome abstracts focussed on, but not limited to:

More accurate, robust and accountable ML models:
- Hybrid models (physically informed ML, parameterizations, emulation, data-model integration)
- Novel detection and attribution approaches
- Probabilistic modelling and uncertainty quantification
- Uncertainty quantification and propagation
- Distributional robustness, transfer learning and/or out-of-distribution generalisation tasks in climate science
- Green AI

Improved understanding through data-driven approaches:
- Causal discovery and inference: causal impact assessment, interventions, counterfactual analysis
- Learning (causal) process and feature representations in observations or across models and observations
- Explainable AI applications
- Discover governing equations from climate data with symbolic regression approaches

Enhanced interaction:
- The human in the loop - active learning & reinforcement learning for improved emulation and simulations
- Large language models and AI agents - exploration and decision making, modeling regional decision-making
- Human interaction within digital twins

Convener: Duncan Watson-Parris | Co-conveners: Marlene KretschmerECSECS, Gustau Camps-Valls, Peer NowackECSECS, Sebastian SippelECSECS
Orals
| Tue, 16 Apr, 08:30–12:25 (CEST), 14:00–15:40 (CEST)
 
Room C
Posters on site
| Attendance Wed, 17 Apr, 10:45–12:30 (CEST) | Display Wed, 17 Apr, 08:30–12:30
 
Hall X5
Posters virtual
| Wed, 17 Apr, 14:00–15:45 (CEST) | Display Wed, 17 Apr, 08:30–18:00
 
vHall X5
Orals |
Tue, 08:30
Wed, 10:45
Wed, 14:00
ITS1.3/CL0.1.18 EDI

Machine learning (ML) is being used throughout the geophysical sciences with a wide variety of applications.
Advances in big data, deep learning, and other areas of artificial intelligence (AI) have opened up a number of new approaches.

Many fields (climate, ocean, NWP, space weather etc.) make use of large numerical models and are now seeking to enhance these by combining them with scientific ML/AI.
Examples include ML emulation of computationally intensive processes, training on high resolution models or data-driven parameterisations for sub-grid processes, and Bayesian optimisation of model parameters and ensembles amongst several others.

Doing this brings a number of unique challenges, however, including but not limited to:
- enforcing physical compatibility and conservation laws, and incorporating physical intuition into ML models,
- ensuring numerical stability,
- coupling of numerical models to ML frameworks and language interoperation,
- handling computer architectures and data transfer,
- adaptation/generalisation to different models/resolutions/climatologies,
- explaining, understanding, and evaluating model performance and biases.

Addressing these requires knowledge of several areas and builds on advances already made in domain science, numerical simulation, machine learning, high performance computing, data assimilation etc.

We solicit talks that address any topics relating to the above.
Anyone working to combine machine learning techniques with numerical modelling is encouraged to participate in this session.

Convener: Jack AtkinsonECSECS | Co-conveners: Julien Le Sommer, Alessandro Rigazzi, Filippo GattiECSECS, Will ChapmanECSECS, Nishtha SrivastavaECSECS, Emily Shuckburgh
Orals
| Fri, 19 Apr, 08:30–10:15 (CEST)
 
Room N2
Posters on site
| Attendance Fri, 19 Apr, 10:45–12:30 (CEST) | Display Fri, 19 Apr, 08:30–12:30
 
Hall X5
Posters virtual
| Fri, 19 Apr, 14:00–15:45 (CEST) | Display Fri, 19 Apr, 08:30–18:00
 
vHall X5
Orals |
Fri, 08:30
Fri, 10:45
Fri, 14:00

CL1.1 – Past Climate - Deep Time

Sub-Programme Group Scientific Officer: Jan-Berend Stuut

CL1.1.1 EDI

The geological record provides insight into how climate processes operate and evolve in response to different than modern boundary conditions and forcings. Understanding deep-time climate evolution is paramount to progressing on understanding fundamental questions of Earth System feedbacks and sensitivity to perturbations, such as the behaviour of the climate system and carbon cycle under elevated atmospheric CO2 levels—relative to the Quaternary—, or the existence of climatic tipping points and thresholds. In recent years, geochemical techniques and Earth System Models complexity have been greatly improved and several international projects on deep-time climates (DeepMIP, MioMIP, PlioMIP) have been initiated, helping to bridge the gap between palaeoclimate modelling and data community. This session invites work on deep-time climate and Earth System model simulations and proxy-based reconstructions from the Cambrian to the Pliocene. We especially encourage submissions featuring palaeoenvironmental reconstructions, palaeoclimate and carbon cycle modelling, and the integration of proxies and models of any complexity.

Convener: Yonggang Liu | Co-conveners: Jean-Baptiste LadantECSECS, Yannick Donnadieu, Ran FengECSECS, Pam VervoortECSECS, Hana JurikovaECSECS
Orals
| Mon, 15 Apr, 08:30–12:15 (CEST)
 
Room 0.31/32
Posters on site
| Attendance Mon, 15 Apr, 16:15–18:00 (CEST) | Display Mon, 15 Apr, 14:00–18:00
 
Hall X5
Orals |
Mon, 08:30
Mon, 16:15
CL1.1.2 EDI

The pacing of the global climate system by orbital variations is clearly demonstrated in the timing of e.g. glacial-interglacial cycles. The mechanisms that translate this forcing in nonlinear ways into geoarchives and climate changes continue to be debated.
In this regard, paleoclimate signals from Iberian margin sediment cores are exceptional, because these can be correlated precisely to polar ice cores from both hemispheres and with European terrestrial records, providing a rare opportunity to study ocean-ice-land interactions. Moreover, the Iberian continental slope provides a bathymetric gradient that intersects each of the major subsurface water masses of the North Atlantic, which is ideal for reconstructing past changes in Atlantic thermohaline circulation and ventilation. Given the seminal importance of the Iberian margin for marine-ice-terrestrial correlations, it has been a prime target for the recovery of sediment cores.
We invite submissions that explore the climate system response to orbital forcing, and that test the stability of these relationships under different climate regimes or across evolving climate states (e.g. mid Pleistocene transition, Pliocene-Pleistocene transition, Miocene vs Pliocene, and especially older climate transitions). Further, we deliberatiely focus on contributions that bring together recent research using the Iberian margin sediment archive to reconstruct climate variability on millennial-to-orbital timescales and integrate marine, atmospheric (ice core), and terrestrial signals to understand causal mechanisms of global climate change. Submissions exploring proxy data and/or modelling work are welcomed, as this session aims to bring together proxy-based, theoretical and/or modelling studies focused on global and regional climate responses to astronomical forcing at different time scales in the Phanerozoic.
David De Vleeschouwer will give an invited presentation on 'Pre-Cenozoic cyclostratigraphy and paleoclimate responses to astronomical forcing'.

Co-organized by SSP2
Convener: Christian Zeeden | Co-conveners: Stefanie Kaboth-Bahr, Huai-Hsuan May HuangECSECS, Xiaolei PangECSECS, Marion PeralECSECS, David Hodell, Fatima Abrantes
Orals
| Tue, 16 Apr, 14:00–15:45 (CEST), 16:15–17:45 (CEST)
 
Room 0.49/50
Posters on site
| Attendance Mon, 15 Apr, 16:15–18:00 (CEST) | Display Mon, 15 Apr, 14:00–18:00
 
Hall X5
Posters virtual
| Mon, 15 Apr, 14:00–15:45 (CEST) | Display Mon, 15 Apr, 08:30–18:00
 
vHall X5
Orals |
Tue, 14:00
Mon, 16:15
Mon, 14:00
CL1.1.4 EDI

The planet is warming due to human-made greenhouse gas emissions, which have increased drastically since the industrial revolution. To grasp potential pathways for future climate, we need to understand what the impacts of elevated greenhouse gas emissions are on the global heat budget and how the climate system functions in conditions warmer than today. Geological archives and model simulations of past climate states are the key to better understanding climate dynamics in different, warmer-than-today climate conditions. Past warm climates also help to benchmark climate model simulations used to predict future climate and have contributed increasingly to successive IPCC reports.

In this session, we welcome contributions ranging from proxy data to model results aimed at reconstructing and understanding Earth’s climate state and its dynamics over the past 100 million years. We welcome submissions across a wide range of time scales, including those investigating long-term change, Milankovitch cyclicity and/or short-lived events, from the Cretaceous to the Present. Submissions working on chronological or stratigraphic fundamentals underpinning this interval are also encouraged. We invite contributions seeking to better assess Earth system sensitivity in past climate states by reconstructing atmospheric CO2 concentrations and global or regional temperatures. As analogues of biodiversity in a warmer world can only be found in the past, we encourage submissions on marine and terrestrial ecosystem dynamics and disruptions in warmer worlds.

The session intends to bring together the diverse community studying the nature of the warm climate states found in the Cretaceous and Cenozoic. This session also aims to bring together the paleoclimate data and modelling communities to evaluate lessons learned from the Deep-time Model Intercomparison Project (https://www.deepmip.org/) and explore future directions moving forward. We consciously welcome a broad range of approaches to facilitate synergies to learn from past warm climate conditions to navigate into the future warmer world.

Co-organized by BG5/SSP4
Convener: Thomas Westerhold | Co-conveners: Anna Nele Meckler, Dan Lunt, Gordon InglisECSECS, Eleni Anagnostou, Anna Joy Drury, Victoria TaylorECSECS
Orals
| Thu, 18 Apr, 08:30–12:30 (CEST), 14:00–15:45 (CEST)
 
Room 0.14
Posters on site
| Attendance Fri, 19 Apr, 10:45–12:30 (CEST) | Display Fri, 19 Apr, 08:30–12:30
 
Hall X5
Orals |
Thu, 08:30
Fri, 10:45
CL1.1.5 EDI

Joint topics
Topic 1. Stable and radiogenic isotopic records have been successfully used for
investigating various settings, such as palaeosols, lacustrine, loess, caves, peatlands, bogs, arid, evaporative and marine environments. We are
looking for contributions using isotopes along with mineralogical, sedimentological, biological, paleontological and chemical records in
order to unravel the past and present climate and environmental changes.
The session invites contributions presenting an applied as well as a
theoretical approach. We welcome papers related to both reconstructions
(at various timescales) as well as on fractionation factors, measurement, methods, proxy calibration, and verification.

Topic 2
Sedimentary records preserve information on their environments at the time of deposition. Such information can be accessed using a growing number of isotopic proxies. Modern sediments are crucial to calibrate such proxies and allow the sedimentary rock record to be deciphered, providing important clues to better understand the future response of the Earth system under climate change.

The sediments deposited along the transitional zone (fluvial system, continental shelf, and continental slope) to the final sink in the deep-marine basin accumulate chemical information on changes in the atmosphere, on land, and in the oceans. Specifically, changes in climate and environmental conditions, such as weathering, oxygenation, bio-productivity, and ocean circulation, can lead to variable element accumulation, isotope mixing, and isotopic fractionation.

We welcome contributions that reconstruct changes in climate and environmental conditions using sediments and sedimentary rocks from the recent to the ancient past (e.g., Last Glacial Maximum, Paleocene Eocene Thermal Maximum, Great Oxidation Event), using traditional, non-traditional, stable, and radiogenic isotope systems (e.g., Li, Mg, Cr, Fe, Sr, Mo, Nd, Pb, U). To account for the diversity of sedimentary archives, contributions on all types of archives are welcome, from carbonates to siliciclastic muds, and from biogenic to abiotic. We also encourage submissions relating to field or laboratory calibrations of these isotopic proxies.

Co-organized by BG2/SSP4
Convener: Ana-Voica Bojar | Co-conveners: Christophe Lecuyer, Andrzej Pelc, Octavian G. Duliu, Rocio Jaimes-GutierrezECSECS, Sylvie BruggmannECSECS, Michael E. Böttcher
Orals
| Thu, 18 Apr, 14:00–15:45 (CEST)
 
Room 0.31/32
Posters on site
| Attendance Wed, 17 Apr, 16:15–18:00 (CEST) | Display Wed, 17 Apr, 14:00–18:00
 
Hall X5
Posters virtual
| Wed, 17 Apr, 14:00–15:45 (CEST) | Display Wed, 17 Apr, 08:30–18:00
 
vHall X5
Orals |
Thu, 14:00
Wed, 16:15
Wed, 14:00
BG5.3 EDI

This session aims to bring together a diverse group of scientists who are interested in how life and planetary processes have co-evolved over geological time. This includes studies of how paleoenvironments have contributed to biological evolution and vice-versa, linking fossil records to paleo-Earth processes and the influence of tectonic and magmatic processes on the evolution of life. As an inherently multi-disciplinary subject, we aspire to better understand the complex coupling of biogeochemical cycles and life, the links between mass extinctions and their causal geological events and how fossil records shed light on ecosystem drivers over deep time. We aim to understand our planet and its biosphere through both observation- and modelling-based studies.

Co-organized by CL1.1/GD3/SSP4
Convener: Khushboo GurungECSECS | Co-conveners: Julian RoggerECSECS, Emily Mitchell, Attila BalázsECSECS, Svetlana Botsyun, William MatthaeusECSECS, Katarzyna Marcisz
Orals
| Fri, 19 Apr, 08:30–12:25 (CEST)
 
Room 2.95
Posters on site
| Attendance Fri, 19 Apr, 16:15–18:00 (CEST) | Display Fri, 19 Apr, 14:00–18:00
 
Hall X1
Posters virtual
| Fri, 19 Apr, 14:00–15:45 (CEST) | Display Fri, 19 Apr, 08:30–18:00
 
vHall X1
Orals |
Fri, 08:30
Fri, 16:15
Fri, 14:00
GD3.1 EDI

The first half of Earth’s history (Hadean to Paleoproterozoic) laid the foundations for the planet we know today. But how and why it differed and how and why it evolved remain enduring questions.
In this session, we encourage the presentation of new approaches that improve our understanding on the formation, structure, and evolution of the early Earth ranging from the mantle and lithosphere to the atmosphere, oceans and biosphere, and interactions between these reservoirs.
This session aims to bring together scientists from a large range of disciplines to provide an interdisciplinary and comprehensive overview of the field. This includes, but is not limited to, fields such as early mantle dynamics, the formation, evolution and destruction of the early crust and lithosphere, early surface environments and the evolution of the early biosphere, mineral deposits, and how possible tectonic regimes impacted across the early Earth system.

Co-organized by BG7/CL1.1/GMPV10/TS8
Convener: Ria Fischer | Co-conveners: Peter Cawood, Jeroen van Hunen, Bing XiaECSECS, Desiree Roerdink
Orals
| Wed, 17 Apr, 08:30–12:30 (CEST), 14:00–15:45 (CEST)
 
Room -2.21
Posters on site
| Attendance Thu, 18 Apr, 16:15–18:00 (CEST) | Display Thu, 18 Apr, 14:00–18:00
 
Hall X2
Orals |
Wed, 08:30
Thu, 16:15

CL1.2 – Past Climate - Last ~2.6 Ma

Sub-Programme Group Scientific Officers: Jan-Berend Stuut, Carole Nehme

CL1.2.1 EDI

This session aims to place recently observed climate change in a long-term perspective by highlighting the importance of paleoclimate research spanning the past 2000 years. We invite presentations that provide insights into past climate variability, over decadal to millennial timescales, from different paleoclimate archives (ice cores, marine sediments, terrestrial records, historical archives and more). In particular, we are focussing on quantitative temperature and hydroclimate reconstructions, and reconstructions of large-scale modes of climate variability from local to global scales. This session also encourages presentations on the attribution of past climate variability to external drivers or internal climate processes, data syntheses, model-data comparison exercises, proxy system modelling, and novel approaches to producing multi-proxy climate field reconstructions such as data assimilation or machine learning.

Co-sponsored by PAGES 2k
Convener: Andrea Seim | Co-conveners: Hugo Beltrami, Daniel BoatengECSECS, Stefan Bronnimann, Jun Hu
Orals
| Wed, 17 Apr, 08:30–12:25 (CEST)
 
Room 0.14
Posters on site
| Attendance Wed, 17 Apr, 16:15–18:00 (CEST) | Display Wed, 17 Apr, 14:00–18:00
 
Hall X5
Posters virtual
| Wed, 17 Apr, 14:00–15:45 (CEST) | Display Wed, 17 Apr, 08:30–18:00
 
vHall X5
Orals |
Wed, 08:30
Wed, 16:15
Wed, 14:00
CL1.2.2 EDI

Tree rings are one of nature’s most versatile archives, providing insight into past environmental conditions at annual and intra-annual resolution and from local to global scales. Besides being valued proxies for historical climate, tree rings are also important indicators of plant physiological responses to changing environments and of long-term ecological processes. In this broad context we welcome contributions using one or more of the following approaches to either study the impact of environmental change on the growth and physiology of trees and forest ecosystems, or to assess and reconstruct past environmental change: (i) dendrochronological methods including studies based on tree-ring width, MXD or Blue Intensity, (ii) stable isotopes in tree rings and related plant compounds, (iii) dendrochemistry, (iv) quantitative wood anatomy, (v) ecophysiological data analyses, and (vi) mechanistic modeling, all across temporal and spatial scales.

Co-organized by BG3
Convener: Elisabet Martinez-SanchoECSECS | Co-conveners: Kerstin Treydte, Flurin Babst, Jernej JevšenakECSECS, Pieter Zuidema
Orals
| Tue, 16 Apr, 14:00–15:45 (CEST)
 
Room 0.31/32
Posters on site
| Attendance Mon, 15 Apr, 16:15–18:00 (CEST) | Display Mon, 15 Apr, 14:00–18:00
 
Hall X5
Orals |
Tue, 14:00
Mon, 16:15
CL1.2.3

Speleothems are key terrestrial archives of regional to global paleoclimatic and paleoenvironmental changes on sub-seasonal to orbital scales. They provide high temporally resolved records which can be accurately and precisely dated using a variety of proxies such as stable O and C isotopes and trace elements. Recent efforts have seen the rise in more non-traditional proxies such as fluid inclusion water isotopes, organic biomarkers, pollen, dead carbon fraction etc.. This advancement towards quantitative reconstructions of past precipitation, temperature, or other environmental variables and climate patterns, are key variables for data-model comparisons and evaluation. Beyond this, caves and karst areas additionally host an enormous suite of other valuable archives such as cave ice, cryogenic carbonates, clastic sediments, tufa, or travertine sequences which complement the terrestrial palaeorecord, and are often associated with important fossils or archaeological findings.
This session aims to integrate recent developments in the field, and invites submissions from a broad range of cave- and karst-related studies from orbital to sub-seasonal timescales.
In particular we welcome contributions from:
(1) (quantitative) reconstructions of past climatic and environmental variables to reconstruct precipitation, vegetation, fire frequency, temperature etc. across different climate zones,
(2) field- and lab-based developments of process-based methods to improve our application of proxy variables,
(3) process and proxy-system model studies as well as integrated research developing and using databases such as SISAL (Speleothem Isotope Synthesis and AnaLysis).
We further welcome advancements in related and/or interdisciplinary areas, which pave the way towards robust (quantitative) interpretations of proxy time series, improve the understanding of proxy-relevant processes, or enable regional-to-global and seasonal-to-orbital scale analyses of the relationships between proxies and environmental parameters. In addition, research contributing to current international co-ordinated activities, such as the PAGES working group on Speleothem Isotopes Synthesis and AnaLysis (SISAL) and others are welcome.

Co-sponsored by PAGES
Convener: Sophie WarkenECSECS | Co-conveners: Laura EndresECSECS, Rieneke WeijECSECS, Ezgi Unal Imer, Monika MarkowskaECSECS
Orals
| Wed, 17 Apr, 14:00–18:00 (CEST)
 
Room 0.14
Posters on site
| Attendance Thu, 18 Apr, 10:45–12:30 (CEST) | Display Thu, 18 Apr, 08:30–12:30
 
Hall X5
Posters virtual
| Thu, 18 Apr, 14:00–15:45 (CEST) | Display Thu, 18 Apr, 08:30–18:00
 
vHall X5
Orals |
Wed, 14:00
Thu, 10:45
Thu, 14:00
CL1.2.4 EDI

The half-century since the first deep ice core drilling at Camp Century, Greenland, has seen increased spatial coverage of polar ice cores, as well as extensive development in methods of ice sample extraction, analysis and interpretation. This growth and innovation continues as we address pressing scientific questions surrounding past climate dynamics, environmental variability and glaciological phenomena. New challenges include the retrieval of old, highly thinned ice, interpretation of altered chemical signals, and the integration of chemical proxies into earth system models. We invite contributions reporting the state-of-the-art in ice coring sciences, including drilling and processing, dating, analytical techniques, results and interpretations of ice core records from polar ice sheets and mid- and low-latitude glaciers, remote and autonomous methods of surveying ice stratigraphy, proxy system modelling and related earth system modelling. We particularly encourage submissions from early career researchers from across the broad international ice core science community. This session is supported by the European DEEPICE training network for early career scientists.

Convener: Rachael Rhodes | Co-conveners: Hans Christian Steen-Larsen, Lison SoussaintjeanECSECS, Piers LarkmanECSECS, Thomas Blunier
Orals
| Wed, 17 Apr, 10:45–12:30 (CEST), 14:00–18:00 (CEST)
 
Room 0.49/50
Posters on site
| Attendance Thu, 18 Apr, 10:45–12:30 (CEST) | Display Thu, 18 Apr, 08:30–12:30
 
Hall X5
Orals |
Wed, 10:45
Thu, 10:45
CL1.2.5

Over the last 1.5 Myr, the rhythm of Earth’s glaciations changed from a 40 kyr to a 100 kyr periodicity, crossing the Mid-Pleistocene Transition (MPT). This transition does not follow directly from Milankovitch theory. Against the background of ongoing deep ice drilling projects and blue ice studies in Antarctica, we encourage the broader paleo community to show their latest results on the glacial dynamics of the 40 kyr and 100 kyr worlds, and the MPT. We invite presentations on proxy studies of paleo-environmental conditions and processes, as well as model studies providing insight into the dynamics and drivers of the Earth climate system . This session is supported by Beyond EPICA-Oldest Ice and COLDEX.

Including Milutin Milankovic Medal Lecture by Peter U. Clark
Co-organized by CR5
Convener: Eric Wolff | Co-conveners: Christo Buizert, Jenn Campos-AyalaECSECS, Margareta Hansson, Inès OllivierECSECS
Orals
| Mon, 15 Apr, 08:30–12:30 (CEST), 14:00–15:45 (CEST), 16:15–17:15 (CEST)
 
Room F1
Posters on site
| Attendance Tue, 16 Apr, 16:15–18:00 (CEST) | Display Tue, 16 Apr, 14:00–18:00
 
Hall X5
Orals |
Mon, 08:30
Tue, 16:15
CL1.2.6 EDI

Feedbacks within the Earth’s system involving the global carbon cycle, ice-sheet dynamics and oceanic circulation played a significant role in shaping the timing and amplitude of Quaternary deglaciations and their preceding glacial periods, as well as abrupt millennial-scale variability within the Last Glacial Cycle. For example, the deep ocean likely played a key role in modulating changes in atmospheric CO2; and ice sheet evolution exerts a strong control on atmosphere and ocean circulation. However, the precise combination of mechanisms and feedbacks responsible for glacial-interglacial and millennial-scale climate transitions remains unresolved. This session invites contributions from studies that provide an improved understanding of the processes and feedbacks occurring during glacial periods and deglaciations during the past 2.6 Ma. This includes new palaeo records, data syntheses and numerical simulations examining climate, the global carbon cycle, continental ice-sheets, ocean circulation, and sea-level.

Co-organized by CR1/OS1
Convener: Ruza Ivanovic | Co-conveners: Markus Adloff, Etienne LegrainECSECS, Svetlana RadionovskayaECSECS, Himadri SainiECSECS, Madison ShankleECSECS
Orals
| Fri, 19 Apr, 08:30–12:30 (CEST), 14:00–15:45 (CEST)
 
Room 0.14
Posters on site
| Attendance Thu, 18 Apr, 16:15–18:00 (CEST) | Display Thu, 18 Apr, 14:00–18:00
 
Hall X5
Posters virtual
| Thu, 18 Apr, 14:00–15:45 (CEST) | Display Thu, 18 Apr, 08:30–18:00
 
vHall X5
Orals |
Fri, 08:30
Thu, 16:15
Thu, 14:00
CL1.2.7 EDI | PICO

Greenland ice core records feature Dansgaard–Oeschger (D-O) events, which are abrupt warming episodes followed by gradual cooling during the last glacial period. New modelling studies and paleoclimate records have greatly advanced efforts to piece together the whys and hows of D-O events, yet we still lack a definitive explanation for them. The prevalent hypothesis is that D-O events are a result of variations in the strength of the Atlantic Meridional Overturning Circulation (AMOC) but many uncertainties remain about the role of interactions and feedbacks between various components of the Earth System in shaping the magnitude and duration of D-O events. A key question, still unanswered, is whether D-O events are triggered by noise, external forcing, or by bifurcations in the underlying dynamical system.
Trying to understand whether anthropogenic climate change could push the climate system over similar tipping points is an important motivation for studying D-O events. This session will provide an opportunity to assess recent progress in documenting observed climate changes during D-O events, and to evaluate the state of knowledge about model behaviour during these abrupt events. We encourage both studies based on proxy data, those using simple model, intermediate or advanced models to submit abstracts with the aim to facilitate the most comprehensive overview of DO events.

Convener: Irene Malmierca ValletECSECS | Co-conveners: Louise Sime, Maria Fernanda Sanchez Goñi, Nils WeitzelECSECS
PICO
| Mon, 15 Apr, 16:15–18:00 (CEST)
 
PICO spot 5
Mon, 16:15
CL1.2.9 EDI

The Arctic and Antarctic realms have experienced significant changes over the observational era. The polar and subpolar climates of both hemispheres are crucial for the Earth’s energy and water budget and the observed changes can have detrimental effects on the unique ecosystems and with it the marine carbon cycle. The changes observed in the Arctic and Antarctic are thus active at regional to global scales. The myriad of processes, operate on a wide spectrum of time scales and they require crucial information from various research fields to understand the mechanisms, drivers, and consequences of Arctic and Antarctic changes across the land-ocean-atmosphere-cryosphere continuum.
In this session, we invite contributions from a range of disciplines and across time scales, including observational (remote and in-situ) data, historical data, geological archives and proxy data, model simulations and forecasts, for the past, present and future climate. The common denominator of these studies will be their focus on a better understanding of multi-scale mechanisms that drive Arctic and Antarctic changes and their impact on local and global climate and society. Furthermore, the session aims to discuss ongoing efforts to improve climate predictions at high latitudes at various time scales (e.g., usage of additional observations for initialization, improved initialization methods, improved parameterizations, novel verification approaches, etc.) and potential teleconnections of high latitude climate with lower latitudes. Additionally, of particular interests are high-resolution modelling endeavours, exploration of feedbacks and tipping points, attribution analyses, and studies of long-term polar climate change across the whole spectrum of possible future emission scenarios as well as the question of what past warm climates can teach us about future polar and subpolar climate. We also aim to link high-latitude climate variability, change, predictions, and projections to potential ecological and socio-economic impacts and encourage submissions on such topics.

Convener: Henrieka DetlefECSECS | Co-conveners: Neven-Stjepan Fuckar, Richard Bintanja, Marit-Solveig Seidenkrantz, Anne de Vernal, Christoph BöttnerECSECS, Joanna DaviesECSECS
Orals
| Thu, 18 Apr, 16:15–18:00 (CEST)
 
Room 0.14
Posters on site
| Attendance Fri, 19 Apr, 10:45–12:30 (CEST) | Display Fri, 19 Apr, 08:30–12:30
 
Hall X5
Orals |
Thu, 16:15
Fri, 10:45
CL1.2.10 EDI

Paleoclimate archives provide unique insights into the links between atmosphere, ocean, and cryosphere during abrupt climatic changes. Understanding these interactions helps to better forecast the effects of potential future changes. Whilst past climate reconstructions serve as important benchmarks to test climate models, uncertainties due to varying proxy sensitivities and imprecise chronologies may undermine the determination of environmental drivers, feedbacks, and threshold mechanisms involved in abrupt climate events. The INTIMATE network aims to reduce uncertainties in paleoclimate proxy records and their chronological frameworks to improve inter-site comparisons of ice, marine, and terrestrial records and expose processes that link these systems.

This session invites contributions that focus on the identification, quantification, and modelling of abrupt climatic changes, associated ice-ocean-atmosphere processes, and/or the impact of these changes on ecosystem, landscape, and societies during the INTIMATE timeframe (~125 kyrs to present). This session has a particular interest in novel proxy-based reconstructions, state-of-the-art chronological techniques and statistical approaches, and innovative model-generated climate records that allow new insights into rapid (natural) climate variability and spatiotemporal differences.

INTIMATE is an open paleoclimate research community that facilitates the reconstruction of Quaternary climate changes by INTegrating Ice core, MArine and TErrestrial paleoclimate records. This session intends to bring these scientists together and serve as a hub for them. There will be a social/networking event associated to this session.

Co-organized by SSP2
Convener: Rick Hennekam | Co-conveners: Celia Martin-Puertas, Cecile Blanchet, Daniela J. M. MüllerECSECS, Florian Adolphi
Orals
| Thu, 18 Apr, 16:15–18:00 (CEST)
 
Room 0.31/32
Posters on site
| Attendance Fri, 19 Apr, 10:45–12:30 (CEST) | Display Fri, 19 Apr, 08:30–12:30
 
Hall X5
Orals |
Thu, 16:15
Fri, 10:45
CL1.2.13 EDI

Modelling past climate states, and the transient evolution of Earth’s climate remains challenging. Time periods such as the Paleocene, Eocene, Pliocene, the Last Interglacial, the Last Glacial Maximum or the mid-Holocene span across a vast range of climate conditions. At times, these lie far outside the bounds of the historical period that most models are designed and tuned to reproduce. However, our ability to predict future climate conditions and potential pathways to them is dependent on our models' abilities to reproduce just such phenomena. Thus, our climatic and environmental history is ideally suited to thoroughly test and evaluate models against data, so they may be better able to simulate the present and make future climate projections.

We invite contributions on palaeoclimate-specific model development, model simulations and model-data comparison studies. Simulations may be targeted to address specific questions or follow specified protocols (as in the Paleoclimate Modelling Intercomparison Project – PMIP or the Deep Time Model Intercomparison Project – DeepMIP). They may include anything between time-slice equilibrium experiments to long transient climate simulations (e.g. transient simulations covering the entire glacial cycle as per the goal of the PalMod project) with timescales of processes ranging from synoptic scales to glacial cycles and beyond. Comparisons may include past, historical as well as future simulations and focus on comparisons of mean states, gradients, circulation or modes of variability using reconstructions of temperature, precipitation, vegetation or tracer species (e.g. δ18O, δD or Pa/Th).

Evaluations of results from the latest phase of PMIP4-CMIP6 are particularly encouraged. However, we also solicit comparisons of different models (comprehensive GCMs, isotope-enabled models, EMICs and/or conceptual models) between different periods, or between models and data, including an analysis of the underlying mechanisms as well as contributions introducing novel model or experimental setups.

Convener: Elisa ZieglerECSECS | Co-conveners: Kira Rehfeld, Marie-Luise Kapsch, Sam Sherriff-TadanoECSECS, Brooke SnollECSECS
Orals
| Tue, 16 Apr, 10:45–12:30 (CEST)
 
Room 0.31/32
Posters on site
| Attendance Tue, 16 Apr, 16:15–18:00 (CEST) | Display Tue, 16 Apr, 14:00–18:00
 
Hall X5
Orals |
Tue, 10:45
Tue, 16:15
CL1.2.14 EDI

As the Earth's climate continues to change, rising temperatures and prolonged (seasonal) dry conditions are impacting vegetation and wildfire dynamics. Recent decades have witnessed an increase in the intensity, extent, and frequency of wildfires in fire-adapted regions and areas historically less prone to fires are now experiencing such events. Our understanding of vegetation and fire dynamics from in-situ observations and remote sensing is primarily limited to the past few decades. Palaeoclimate research gives insights into a wide range of interactions between climate, vegetation, and wildfires predating human land management. Documenting past vegetation and wildfire changes and inferring drivers and dynamics is of utmost importance for understanding ongoing and future changes of climate and continental ecosystems. Recent years have seen an increasing number of detailed reconstructions and significant improvement in model performance that allow fresh insights into spatio-temporal dynamics of ecosystems in response to climatic perturbations. Earth system models are increasingly used to understand the complex interactions between the biosphere and physical and biogeochemical components of the Earth system.

This session invites contributions on modern approaches to understand vegetation and wildfire dynamics during the Quaternary and their interactions with climate on seasonal to orbital timescales. These include but are not limited to (a) regional and global-scale reconstructions of vegetation cover and composition from paleontological and geochemical data, (b) the development and application of innovative proxies and archives, (c) Earth system model simulations of various time intervals, (d) studies combining data and models, and (e) proxy system modeling and novel statistical methods to constrain vegetation and wildfire dynamics and their drivers. We also welcome contributions related to technical and analytical advancements in organic and inorganic geochemical analyses, and in-situ calibration studies. Special attention is given to studies focusing on currently understudied regions and time intervals, and research that has the potential to inform future land management policies.

Co-organized by BG5
Convener: Nils WeitzelECSECS | Co-conveners: Yuval BurstynECSECS, Maria Fernanda Sanchez Goñi, Cameron de WetECSECS, Zhao WangECSECS, Anne Dallmeyer, Sebastian F.M. Breitenbach
Orals
| Tue, 16 Apr, 16:15–18:00 (CEST)
 
Room 0.31/32
Posters on site
| Attendance Tue, 16 Apr, 10:45–12:30 (CEST) | Display Tue, 16 Apr, 08:30–12:30
 
Hall X5
Posters virtual
| Tue, 16 Apr, 14:00–15:45 (CEST) | Display Tue, 16 Apr, 08:30–18:00
 
vHall X5
Orals |
Tue, 16:15
Tue, 10:45
Tue, 14:00
GM10.4 EDI

Mountain and ice sheet glaciations provide an invaluable record for past and present climate change. However, varying geomorphological process-systems, specific glaciological conditions and topography can make regional, intra-hemispheric and global correlations challenging. This problem is further enhanced by ongoing specialisation within the scientific community. Despite such challenges glacier and ice sheet reconstructions remains a crucial paleo-environmental proxy.

The primary aim of this session is to evaluate the potential of mountain and ice sheet glaciation records and stimulate further research in this important field. Contributions on all relevant aspects are welcomed, for example: (a) glacial landforms and reconstruction of past glaciers and ice sheets, (b) dating techniques and geochronology compilations, (c) ice dynamics and paleoclimatic interpretations, or (d) impacts of ecosystems and human evolution/society. We would particularly like to invite contributions addressing regional and hemispheric connections, issues, and advances. The temporal scale of the session will encompass Early Pleistocene glaciations through to the Last Glacial Maximum, and Holocene/modern glaciers. In the past, this session has attracted contributions from a wide range of locations and a diversity in methodological approaches. It has become a platform for on-going collaborative research on mountain glaciations where people are given the opportunity to exchange ideas and expertise.

ECR keynote talks:

Block 1, Mountain glacier reconstruction
Lukas Rettig - A glacier-based reconstruction of the Last Glacial Maximum climate in the southern European Alps.

Block 2, Ice sheet reconstruction
Gwyneth Rivers - Using sediment facies & ground penetrating radar profiles to investigate the internal architecture and genesis of De Geer moraines.

Co-organized by CL1.2/CR4
Convener: Danni Pearce | Co-conveners: Rachel OienECSECS, Benjamin BoyesECSECS, Giovanni Monegato, Helen DulferECSECS, Jürgen Reitner, Stefan Winkler
Orals
| Tue, 16 Apr, 10:45–12:25 (CEST), 14:00–15:40 (CEST)
 
Room G1
Posters on site
| Attendance Mon, 15 Apr, 10:45–12:30 (CEST) | Display Mon, 15 Apr, 08:30–12:30
 
Hall X3
Orals |
Tue, 10:45
Mon, 10:45

CL2 – Present Climate – historical and direct observations period

Sub-Programme Group Scientific Officers: Irka Hajdas, Martin Wild

CL2.1

The radiation budget of the Earth is a key determinant for the genesis and evolution of climate on our planet and provides the primary energy source for life. Anthropogenic interference with climate occurs first of all through a perturbation of the Earth radiation balance. We invite observational and modelling papers on all aspects of radiation in the climate system. A specific aim of this session is to bring together newly available information on the spatial and temporal variation of radiative and energy fluxes at the surface, within the atmosphere and at the top of atmosphere. This information may be obtained from direct measurements, satellite-derived products, climate modelling as well as process studies. Scales considered may range from local radiation and energy balance studies to continental and global scales. In addition, related studies on the spatial and temporal variation of cloud properties, albedo, water vapour and aerosols, which are essential for our understanding of radiative forcings, feedbacks, and related climate change, are encouraged. Studies focusing on the impact of radiative forcings and feedbacks on the various components of the climate system, such as on the hydrological cycle, on the cryosphere or on the biosphere and related carbon cycle, are also much appreciated.

Including CL Division Outstanding ECS Award Lecture
Co-organized by AS3
Convener: Martin Wild | Co-conveners: Jörg Trentmann, Maria Z. Hakuba, Paul Stackhouse
Orals
| Thu, 18 Apr, 10:45–12:30 (CEST), 14:00–18:00 (CEST)
 
Room F1
Posters on site
| Attendance Fri, 19 Apr, 10:45–12:30 (CEST) | Display Fri, 19 Apr, 08:30–12:30
 
Hall X5
Orals |
Thu, 10:45
Fri, 10:45
CL2.3 EDI

Recent extreme events and climate conditions unprecedented in the observational record have had high-impact consequences globally. Some of these events would have arguably been nearly impossible without human-made climate change and broke records by large margins. Furthermore, compound behaviour and cascading effects and risks are becoming evident. Finally, continuing warming does not only increase the frequency and intensity of events like these, or other until yet unprecedented extremes, it also potentially increases the risk of crossing tipping points and triggering abrupt changes. In order to increase preparedness for high impact climate events, it is important to develop methods and models that are able to represent these events and their impacts, and to better understand how to reduce the risks.

To provide more actionable information for risk assessments, climate storylines have become a popular approach to complement probabilistic event attribution and climate projection. According to the latest IPCC-WG1 report, “the term storyline is used both in connection to scenarios or to describe plausible trajectories of weather and climate conditions or events”. Various types of storylines exist, such as event-based storylines, dynamical storylines of physically plausible climate change, or pseudo-global-warming experiments. This session aims to bring together the latest research on modelling, understanding, development of storylines and managing plausible past and future climate outcomes, extreme and low-probability events, and their impacts. Studies can range across spatial and temporal scales, and can cover compound, cascading, and connected extremes, worst-case scenarios, event-based and dynamical storylines, as well as the effect of tipping points and abrupt changes driven by climate change, societal response, adaptation limits, or other mechanisms (e.g., volcanic eruption).

We welcome a variety of methods aiming to quantify and understand high-impact climate events in present and future climates and, ultimately, provide actionable climate information. We invite work including but not limited to the variety of storyline approaches, model experiments and intercomparisons, insights from paleo archives, climate projections (including large ensembles, and unseen events), and attribution studies.

The session is further informed by the World Climate Research Programme lighthouse activities on Safe Landing Pathways and Understanding High-Risk Events.

Public information:

This session brings together the latest research on exceptional weather and high-impact climate events. It is a follow up from previous year’s successful sessions CL3.2.8 on low-likelihood high-impact events and CL4.8 on storyline approaches. The session is further informed by the World Climate Research Programme lighthouse activities on Safe Landing Pathways and Understanding High-Risk Events. Our aim is to make preparedness to exceptional weather extremes standard practice in the transition to a climate resilient society: https://unseennetwork.org/.

Co-organized by AS1/HS13/NH11
Convener: Timo KelderECSECS | Co-conveners: Marylou AthanaseECSECS, Erich Fischer, Patrick Ludwig, Henrique Moreno Dumont GoulartECSECS, Laura Suarez-GutierrezECSECS, Karin van der Wiel
Orals
| Wed, 17 Apr, 14:00–18:00 (CEST)
 
Room E2
Posters on site
| Attendance Tue, 16 Apr, 16:15–18:00 (CEST) | Display Tue, 16 Apr, 14:00–18:00
 
Hall X5
Posters virtual
| Tue, 16 Apr, 14:00–15:45 (CEST) | Display Tue, 16 Apr, 08:30–18:00
 
vHall X5
Orals |
Wed, 14:00
Tue, 16:15
Tue, 14:00
CL2.4

ENSO and its interactions with other tropical basins are the dominant source of interannual climate variability in the tropics and across the globe. Understanding the dynamics, predictability, and impacts of ENSO and tropical basins interactions, and anticipating their future changes are thus of vital importance for society. This session invites contributions regarding all aspects of ENSO and tropical basins interactions, including: dynamics, multi-scale interactions; decadal and paleo variability; theoretical approaches; ENSO diversity; global teleconnections; impacts on climate, society and ecosystems; seasonal forecasting and climate change projections of tropical mean state changes, ENSO and its tropical basins interactions. Studies aimed at evaluating and improving model simulations of ENSO, the tropical mean state and the tropical basins interactions basin are especially welcomed.

Co-organized by AS1/NP2/OS1
Convener: Nicola MaherECSECS | Co-conveners: Dietmar Dommenget, Yann Planton, Sarah Ineson