In recent decades, quantitative methods have become increasingly important in the field of palaeoenvironmental, palaeoclimatic and palaeohydrological reconstruction, due to the need for comparison between different records and to provide boundary conditions for computational modelling. Continental environmental archives (e.g. speleothems, lake sediments, land snails, rivers, or peatlands) are often highly temporally resolved (subdecadal to seasonal) and may provide more direct information about atmospheric and hydrological processes than marine archives. The wide variety of archive types available on land also allows for intercomparison and ground-truthing of results from different techniques and proxies, and multi-proxy reconstructions from the same archive can disentangle local and supra-regional environmental conditions. This approach is particularly useful for the reconstruction of hydrological dynamics, which are challenging to reconstruct due to their high spatial variability, signal buffering, nonlinearities and uncertainties in the response of palaeoclimate archives and proxies. For example, climate-independent factors such as land cover change can affect the local to regional water availability recorded in proxies.
This session aims to highlight recent advances in the use of innovative and quantitative proxies to reconstruct past environmental change on land. We present studies of various continental archives, including but not limited to carbonates (caves, palaeosols, snails), sediments (lakes, peatlands, rivers, alluvial fans), and biological proxies (tree rings, fossil assemblages, biomarkers). We particularly include studies involving the calibration of physical and chemical proxies that incorporate modern transfer functions, forward modeling and/or geochemical modeling to predict proxy signals, and quantitative estimates of past temperature and palaeohydrological dynamics. We also include reconstructions of temperature and hydrologic variability over large spatial scales and palaeoclimate data assimilation. This session will provide a forum for discussing recent innovations and future directions in the development of terrestrial palaeoenvironmental proxies on seasonal to multi-millennial timescales.
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Please note that the order and number of presentations has been changed as some authors could not attend under the circumstances, or have parallel duties. Authors are kindly asked to upload display material by Friday, 1st May, 2020 so that there is the weekend prior to the online chat for viewing the displays. Our Programme for the Live Chat on 4th May, 2020, 10.45 - 12.30 CET 10.45 - 10.50 Sign in and introduction to session 10.50 - 10.56 D3703 | EGU2020-12712 Changes in biogeochemistry recorded in the Lisan formation and the Dead Sea Basin Alexandra Turchyn, Harold Bradbury, and Adi Torfstein 10.56 - 11.02 D3707 | EGU2020-21994 Holocene climate in Northern Urals (Komi Republic, Russia): a multiproxy approach based on pollen and brGDGTs Chéïma Barhoumi, Sébastien Joannin, Adam A. Ali, Guillemette Ménot, Yulia Golubeva, Dmitri Subetto, Alexander Kryshen, Igor Drobyshev, and Odile Peyron 11.02 - 11.08 D3708 | EGU2020-1150 Primary production in a kettle lake (Canada) was not driven by effective moisture over the last ~900 years Rebecca Doyle, Zijun Liu, Jacob Walker, Ryan Hladyniuk, Katrina Moser, and Fred Longstaffe 11.08 - 11.14 D3731 | EGU2020-18227 Reconstructing past hydrology from drift sand archives: possibilities and limitations Koen Beerten, Wouter van der Meer, Koen Hebinck, Miel Schurmans, and Jan Bastiaens 11.14 - 11.20 D3709 | EGU2020-19247 Global hydroclimate of the Last Interglacial: precipitation, river discharge, floods Paolo Scussolini and the Last Interglacial Floods 11.20 - 11.26 D3705 | EGU2020-18100 A 1,600 year record of paleoseasonality from the neotropics of Central America and its implications for rainfall predictability in agricultural societies Keith Prufer, Sebastian Breitenbach, James Baldini, Tobias Braun, Erin Ray, Lisa Baldini, Victor Polyak, Franziska Lechleitner, Norbert Marwan, Douglas Kennett, and Yemane Asmerom D3725 | EGU2020-11105 CANCELLED :-( Nehme et al.: Speleothem record from Pentadactylos cave (Cyprus): high resolution insight into climatic variations during MIS 6 and MIS 5 11.26 - 11.32 D3723 | EGU2020-2397 Application of novel trace analysis methods for lignin and levoglucosan in flowstone samples from New Zealand during the Holocene Anja Beschnitt and Thorsten Hoffmann 11.32 - 11.38 D3724 | EGU2020-2413 Trace analysis of levoglucosan and lignin-phenols in speleothems by HILIC-UHPLC-ESI-HRMS: A new method Julia Homann, Anja Beschnitt, and Thorsten Hoffmann 11.38 - 11.44 D3726 | EGU2020-16898 Rainfall seasonality changes in northern India across the 4.2 ka event Alena Giesche, Sebastian F.M. Breitenbach, Norbert Marwan, Adam Hartland, Birgit Plessen, Jess F. Adkins, Gerald H. Haug, Amanda French, Cameron A. Petrie, and David A. Hodell 11.44 - 11.50 D3720 | EGU2020-992 Structural ecosystem change in Holocene chironomid assemblages Roseanna Mayfield, Peter Langdon, John Dearing, Patrick Doncaster, and Rong Wang 11.50 - 11.56 D3711 | EGU2020-5311 Paleoclimatic reconstruction studies in lake sediments: major proxies, technical evolution and database Paula Bianchini, Elder Yokoyama, and Luciana Prado 11.56 - 12.02 D3715 | EGU2020-12592 Biomarker (brGDGT) degradation and production in lacustrine surface sediments: Implications for paleoclimate reconstructions Cindy De Jonge, Annika Fiskal, Xingguo Han, and Mark Lever 12.02 - 12.08 D3721 | EGU2020-8457 A theory of palaeoclimate reconstruction Mengmeng Liu, Iain Colin Prentice, Cajo ter Braak, and Sandy Harrison 12.08 - 12.14 D3729 | EGU2020-4240 What we talk about when we talk about seasonality? Ola Kwiecien 12.14 - 12.20 D3732 | EGU2020-4887 Reconstructions of past sediment and water discharges from fluvial-fill terraces in the southern Central Andes of NW Argentina Stefanie Tofelde, Taylor Schildgen, Andrew Wickert, Manfred Strecker, and Ricardo Alonso 12.20 - 12.30 Summary of session |