The Tipping Points Modeling Intercomparison Project (TIPMIP) is a CMIP-registered international model intercomparison project that aims to systematically advance our understanding of tipping dynamics in various Earth system components, and assess the associated uncertainties. Key areas of focus include the polar icesheets, the Atlantic Meridional Overturning Circulation, high-latitude permafrost, and major terrestrial biomes (e.g., the Amazon rainforest and boreal forest). An overarching, initial TIPMIP protocol has been agreed upon by the broader TIPMIP community, and individual domain protocols are under development by domain leads, with initial phase experimental designs to be finalised in early to mid-2025. In this splinter session working meeting, we will update the community on progress towards individual protocol developments, present an overview of initial results, discuss forthcoming publications, overview our initial TIPMIP data request for CMIP, and solicit feedback from the community on these points. We warmly welcome those already engaged with TIPMIP, as well as those interested in getting involved with the project to join these discussions, including but of course not limited to those interested in contributing model runs.

The GEWEX Global Groundwater Network’s mission is to constructively link hydrogeology and groundwater modeling to Earth System modeling in the Hydroclimate Panel (GHP) of GEWEX and beyond (https://www.gewex.org/ggn/). The Global Groundwater Network brings together scientists from the hydrogeologic and groundwater flow modeling communities with the land surface and Earth system modeling communities to formulate a concrete, multi-year science and research agenda. The Network will focus on contributing the hydrogeologic perspective to Earth system modeling. We encourage hydrogeologists and Earth system modeling community to actively participate in the Global Groundwater Network by contributing their expertise and actively shaping the groundwater modeling agenda in Earth system modeling and GEWEX.

The core activities as part of Global Groundwater Network’s mission are to build a strong community and establish a constructive, consistent voice for hydrogeology and groundwater modeling in Earth system modeling and GEWEX framework; include hydrogeologists and groundwater modelex into GEWEX and WCRP working groups and panels for dialogue; identify benefits and opportunities for injecting hydrogeology and groundwater modeling into Earth system modeling and GEWEX; define a scientific agenda of hydrogeology and groundwater modeling in Earth system modeling and GHP, GEWEX; training in hydrogeologic and groundwater flow modeling best practices.

Meeting of IAG (International Association of Geodesy) Commission 3.

During the 2025 EGU General Assembly, the first in-person meeting of the year of the Joint Working Group “Tailored Parameterization Strategies for Climate Applications of Satellite Gravimetry” of the Inter-Commission Committee Geodesy for Climate Research (ICCC) of the International Association of Geodesy (IAG) will take place.
This working group focuses on identifying and implementing spatiotemporally tailored parameterization strategies for satellite gravimetry observations designed for different climate applications. Building up from the simulation environments implemented in previous working groups, parameter models can be evaluated concerning their capabilities to represent climate-related mass transport signals and their feasibility in real data applications. To envision the possibilities that will arise with upcoming satellite gravity missions, improvements expected from MAGIC and future mission concepts shall be investigated next to current single-pair satellite GRACE-type missions. The parameter models shall be defined in close interaction with the respective applications to identify the main criteria to allow new science to emerge from the advanced parameterization strategies.
In the meeting, the JWG will discuss planned activities, possible collaboration, and future research activities.

This session will summarize recent research on the lower Ayeyarwady delta plain and offshore shelf areas. Study topics include estuarine hydrodynamics and sediment transport, sediment dispersal and organic carbon cycling.

SMART cables for tsunami warning in the ICG/NEAM region, especially regarding the MISTS project

Marine and submarine geodesy is needed for a wide range of applications such as evaluating stress building near tectonic plate boundaries, monitoring underwater volcanic activity, precise seafloor mapping or engineering. However, centimeter or sub-centimeter accuracy positioning is still a real challenge. This EGU splinter meeting, organized under the umbrella of the Inter-Commission Committee on Marine Geodesy (ICCM) will focus on marine and seafloor geodesy and should give the opportunity to share ideas on current experiments, recent instrumental or methodological development as well as ideas on data formats and tools for exchanges and international collaboration.

The Horizon Europe-funded project "ENVRINNOV – ENVironment Research Infrastructures Innovation Roadmap," is working towards developing a common Innovation Roadmap for the environmental research infrastructures (ENVRIs) community. As part of the project, a series of capacity building sessions is being developed to promote collaboration and establish a shared understanding of Innovation concepts and processes in the ENVRI community, including on Technology Development, Technology Transfer, and Industrial Approach.

The first session will take place during EGU and aims to:

- Provide a general introduction to the concept of innovation in the context of ENVRIs, and how it can benefit RIs and the ecosystem.
- Demonstrate how the ENVRINNOV project can support ENVRIs in their innovation process.
- Explore ways of enhancing communication and collaboration between ENVRIs and the private sector as a means to accelerate innovation.

We warmly invite all members of the ENVRI community, as well as anyone interested in innovation in environmental research infrastructures, to participate in this interactive and engaging pilot training session. Feedback from this first session, will help shape further training to be made available to the community.

Earth sciences like Hydrogeology and Hydrology deal with freshwater, the most significant share of the global water cycle for humanity. However, hydrology and groundwater education require a high degree of abstraction and a large variety of competencies, ranging from applied field and laboratory methods to quantitative analysis involving advanced mathematical and physical concepts. With a general tendency towards digitalization and media-enriched learning, hydrology and groundwater related education is rapidly evolving a large pool of innovative methods and didactics, such as interactive documents, videos, and electronic questions for various assessments. Combined with a philosophy of openness and accessibility, the quality and outreach of hydrology and groundwater education can be enhanced.
The meeting aims to transfer and provide applied knowledge about recent and innovative advances in hydrology and groundwater education. We will introduce methods and workflows in a practical way so that attendees can easily incorporate them into their own teaching. The methods and materials that the workshop will cover comprise, for example, (1) interactive documents based on Python, (2) electronic assessments with different platforms for classroom- and individual use, (3) instructional videos ranging from screencasts to laboratory and field demonstrations, (4) implementation of measured real-world field data for applied education, and more. The participants will gain experience by practicing and using the methods, tools, and materials with selected examples. Subsequently, attendees will be able to implement the available open-source materials in their own education activities.

In this meeting we will share experiences in using the eWaterCycle platform for hydrological modelling as a teaching tool. Expert users will share educational material and insights. Anyone who already uses eWaterCycle, or wants to start using eWaterCycle in teaching hydrological modelling, is welcome. We will make sure a server running the platform is available online to immediately get hands-on experience

We explore the concept of freshwater resilience through two themes, across local to global scales: 1) conceptualising and quantifying the state of freshwater system resilience and its change, 2) defining system boundaries relevant for interdisciplinary freshwater resilience science and management.

Join us for a Get2gether of scientists supporting the ECRA in their work, where we’ll discuss the intersection of politics and climate science. Feel free to bring your lunch!

The working group “Outreach, Communication and Promoting the Digital Water Globe” is part of the new Scientific Decade of IAHS: Hydrologists Engaging Local People IN one Global world (https://iahs.info/Initiatives/Scientific-Decades/HELPING/). This meeting is a check-in for the progress made on our working group strategy, including contributions to the communication guidelines and templates provided by HELPING, and the ongoing community paper on science communication. It will be an opportunity for working group members to provide feedback on the organisational framework and, if necessary, to finalise the article draft for publication in Hydrological Sciences Journal. Furthermore, it will be an opportunity for working group members to connect offline, rather than relying on online meetings. Finally, we offer the opportunity for new working group members to join the effort and catch them up to speed on our current activities.

The International Commission on Human-Water Feedbacks of the International Association of Hydrological Sciences (IAHS) focuses on the feedbacks between humans and water over decadal and centennial time scales. We therefore mainly consider changes that involve a two-way coupling between human actions and water quantity and quality, i.e. how the water environment and humans coevolve. We are inclusive and interdisciplinary and invite all interested people, regardless of their field, be it social sciences, economics, engineering, hydrology, etc., from all career levels and regardless of memberships in commissions or IAHS.
Come to our splinter meeting when interested in collaborating and discussing on Human-Water Feedbacks, e.g. sharing knowledge, information, papers and organise joint studies and activities.

Building on the insights from last year’s workshop, this second workshop aims to advance the integration of Earth Observation (EO) into Disaster Risk Reduction (DRR) within the context of Multi-(Hazard-)Risk Assessment and Management. The focus will be on identifying key steps forward, with an emphasis on assessing vulnerabilities to enhance the effectiveness of EO in managing complex, interconnected risks.

Iliad provides thematic and localised digital twins of the ocean, capable of running complex, what-if scenarios aiming to provide solutions to address current and future societal challenges. The innovative system of Iliad integrates cross discipline sensors, models and digital infrastructures.

Iliad has implemented a series of thematic and local twins in Europe, Africa and the Middle East. Through the use of existing global resources such as Copernicus, EmodNet and national resources such as Barentswatch, digitalt twins of the ocean have been developed to solve societal challenges related to aquaculture, fisheries, water quality, renewable energy and more.

In this meeting Iliad invites you to selected demonstrations of digital twins followed by a discussion of next generation research and innovation needs to further develop digital twins.

The splinter meeting will inform about the joint forces of the Horizon Europe project group of AVENGERS, EYE-CLIMA, and PARIS and offers a discussion platform for project activities.
The shared objective is to improve emissions data to support the implementation of the Paris Agreement. The projects provide GHG and aerosol emissions estimates using observation-based methods to improve estimates of national emissions and national greenhouse gas inventories (NGHGIs). They collaborate with NGHGI stakeholders, government entities, NGOs, and policy makers.

The Digital Water Globe (DWG) of the International Association of Hydrological Sciences (IAHS) provides a new tool for scientists to share their research through a more interdisciplinary and transformative society. DWG is spatially contextualised within the framework of the Sustainable Development Goals (SDGs), the Unsolved Problems in Hydrology (UPHs), and the Scientific Decades of the IAHS: PUB (Prediction in Ungauged Basins), Panta Rhei and the current HELPING (Hydrologists Engaging Local People IN one Global world). For early-career scientists, the DWG is a great opportunity to increase the visibility of their research and forge new connections. Also, DWG’s users can create profiles free of charge and then log their articles, datasets and case studies. This meeting provides an introduction to the DWG for new users, as well as a presentation of showcase profiles and data entries. The meeting presentation will highlight the DWG’s purpose and key features. We will showcase existing profiles and data entries that demonstrate best practices and diverse applications of the DWG. In addition, there will be an attendees feedback session to gather insights into user experience, discuss specific aspects and needs of the tool, and further refine the tool.
Thus, this Session will also provide an overview of ongoing IAHS’s hydrological research activities as well as scientific achievements which can be highlighted through the DWG. Furthermore, we welcome novel insights, experiences and learnings to accelerate scientific collaboration through the DWG, thereby gathering similar topics or similar areas, and to facilitate engagement with stakeholders, partner organisations, and citizens.

When proposing new legislation, policymakers often open a public call for evidence! This allows individuals and institutions to provide information that is relevant to the topic so that it can be considered!

Open calls for evidence can take many forms - from informal discussions to formal online feedback forms. They are an excellent way for researchers to start engaging with policymaking as it enables them to understand the policy issues and questions!

Led by policy experts, this Splinter Meeting will provide participants with all the information that they need to provide evidence through various forms of these established mechanisms! It will also provide you with tips about how to frame your evidence so that it is used by policymakers.

The meeting of the scientific community of the Geohazard Supersites and Natural Laboratories initiative of GEO is open to all who want to hear what GEO-GSNL is, how to get access to open data to do research at the Supersites, or want to propose a new Supersite.
We will show recent results and discuss future plans.

PRIMA-funded projects AG-WaMED - AGREEMed - AGREEMAR This Splinter Meeting focuses on the use of of Non-Conventional Waters (NCW) (rainwater and runoff harvesting, reclaimed wastewater, desalination, managed aquifer recharge), that can provide a pathway for sustainable water resources management in the agroecosystems of the Mediterranean, and more in general in all climate change-affected contexts.
The meeting is jointly organized by on-going Projects AG-WaMED (Advancing non conventional water management for innovative climate-resilient water governance in the Mediterranean Area - https://agwamed.eu/), AGREEMed (Innovative Aquifers Governance for Resilient Water Management and Sustainable Ecosystems in Stressed Mediterranean Agricultural Areas - https://agreemed.eu/), and AGREEMAR (Adaptive agreements on benefits sharing for managed aquifer recharge in the Mediterranean region - https://www.agreemar.inowas.com/) funded by the Partnership for Research and Innovation in the Mediterranean Area (PRIMA).
The proposed Splinter Meeting will present the main results of the three projects, will highlight synergies between them, and establish future research and funding opportunities searching. The meeting is open to all the interested researchers, especially Early Career Scientists (https://www.egu.eu/ecs/) working in the Mediterranean Area.

This Splinter meeting is organized as a preparatory event for the upcoming 2nd International Sociohydrology Conference, which will be held in Tokyo in July 2025 and supported by IAHS. The session will begin with an overview of the conference, including its key themes, structure, and current status of preparations. Following this, we will engage in an open discussion on the scientific questions that should be addressed at the conference, as well as strategies to ensure the success and broader impact of the event. Participants are encouraged to contribute ideas and perspectives to help shape the conference agenda and foster meaningful dialogue within the sociohydrology community.

Join the community for an informal meeting to brainstorm, discuss, and initiate next steps towards the future of Cosmic-Ray Neutron Sensing: a frontier technology for monitoring of soil moisture, biomass, snow, space weather, and beyond. Following the recent workshops in Ireland and Nebraska 2024, we want to build on the momentum to discuss plans and pathways for future strategies of our community. Strongly linked to the scientific session GI4.4, the talking points will include effective ways of communication to enhance onboarding for newcomers as well as global-scale collaboration and outreach, harmonized and up-to-date data processing, data availability and easy data access, and potential plans for special issues and topical review papers.

Misinformation poses a significant challenge to effective risk communication, often undermining public trust and response. This splinter meeting will address the complexities of managing misinformation in the context of disaster risk communication. Participants will discuss strategies for identifying, countering, and mitigating misinformation, as well as the impact of cognitive biases and media influence on public perception of risk. The meeting will offer insights into best practices for maintaining accurate and credible communication amidst a landscape of conflicting information. Reflecting on the European Commission’s disaster resilience goal no. 2 on ‘Prepare - Increasing risk awareness and preparedness of the population’ and the preparEU programme, this session aims to enhance participants' ability to navigate and address misinformation, ensuring more reliable and effective risk communication. Attendees are encouraged to engage in the scientific session and short course, which together with this meeting form a unified path for a thorough examination of risk communication challenges and solutions.

The session invites practitioners and (social) scientists working in Horizon Disaster Resilient Societies (DRS) projects to exchange experiences and lessons around risk communication.

The working group "Hydrologic Design - Solutions and Communication", which is part of the IAHS HELPING decade, invites people for the bi-annual meeting to discuss the progress so far as well as future projects, such as the formation of sub-groups on specific topics. We will plan our next steps and possible future contributions. Everyone is welcome to join.

Meeting between the GTM e.V. board and founding members.
This meeting serves as formal legal assembly (MV).
The GTM announcement will take place in the Townhall TM13, same day; please stay tuned!
The GTM Townhall will be open for members and all guests, who are interested in Global Tsunami Research.

Several Arctic-focused projects are underway for better understanding the sources and impacts of short-lived climate forcers, such as aerosols, methane, and tropospheric ozone. These include the HTAP Fires multi-model project and the methane focused Reduc(h4)e project, among others, with deliverables planned between 2025 and 2027. The splinter meeting at EGU would allow modellers and other interested parties to meet to discuss the input datasets, modelling setup, progress, and challenges, and for participants to show some initial results and analysis. This meeting would facilitate collaboration and exchange of ideas for the success of these projects. This meeting may also result in more groups participating with their models.

Global climate change mitigation and adaptation efforts remain largely inadequate, leading to a significant increase in climate-related lawsuits. This open splinter meeting offers geoscientists interested in climate change litigation a chance to engage with peers and legal scholars. The goal is to facilitate discussions, exchange ideas, and enhance mutual understanding of how the collaboration between science and law can develop to serve society in the best possible way.

ORFEUS Governance & Coordination Meetings (ORFEUS ExeCom, EIDA and EarthScope), by invitation only.

Decades of work in data standardization, integration, and interoperability have enabled scientists to combine data from diverse disciplines and sources, driving innovative research to address scientific and societal challenges. While we often take for granted the crucial role Research Infrastructures (from small national or regional facilities to large pan-European ones) play in advancing scientific knowledge, how do we measure their performance and assess their scientific and societal impact? Convened by three ESFRI Environmental Research Infrastructures ECCSEL (www.eccsel.org), EMSO (https://emso.eu/) and EPOS (www.epos-eu.org), and the Geo-INQUIRE project, this session will explore methodologies for defining and evaluating KPIs and impact indicators for both national and international RIs.

This meeting is intended to create awareness in the geoscience community and beyond that there is a demand for a coordinated effort to consolidate the Cenozoic Geological Time Scale. We want to discuss potential avenues to set up an international consortium to form a synchronized and highly accurate time frame for Earth Sciences spanning the last 100 million years.

This meeting is designed to establish a network for scientists using environmental DNA (eDNA) and other biological tracers in hydrological research. We warmly invite those already working in this field and those interested in starting projects at the intersection of biology and hydrology or hydrologically related topics to join us. The goal is to foster collaboration by bringing together experts from these two disciplines to exchange knowledge and encourage interdisciplinary partnerships. This gathering will provide a platform for sharing experiences, brainstorming innovative ideas, and discussing the use of biological tracers in hydrological studies. We are excited to explore this interdisciplinary space and look forward to the potential breakthroughs that can emerge from closer collaboration between biology and hydrology. By uniting researchers from various backgrounds, we aim to explore the use of natural tracers, inspire new ideas, generate solutions, and develop new ideas for advancing environmental science. We look forward to exploring with you how biology and hydrology can work together, paving the way for future breakthroughs.

The IERS/IAG/IAU Working Group on EOP Prediction focuses on comparing and assessing the accuracy, reliability, and robustness of Earth Orientation Parameters (EOP) predictions from different centers. It also evaluates the quality of Effective Angular Momentum forecasts essential for EOP prediction, verifies the accuracy of final EOP estimates, and analyzes both stationary and non-stationary uncertainties in present-day EOP predictions. Additionally, the group explores opportunities to integrate EOP predictions from various institutions.
The objectives of the Working Group on Climate Variability and Climate Change in EOP are exploring temporal limits of predictability of individual Earth orientation parameters with (partially) coupled climate models, quantification of contributions from various components of the (anthropogenically altered) Earth’s system to rotational variations on time-scales from days to centennials, assessment of angular momentum budgets of global numerical climate and Earth system models.
We would like to discuss ongoing activities, future plans, and suggestions for improvement within the groups.