Antarctic Ice Sheet paleo-constraint database
2023
Lecavalier, Benoit, S | Tarasov, Lev | Balco, Greg | Spector, Perry | Hillenbrand, Claus-Dieter | Buizert, Christo | Ritz, Catherine | Leduc-Leballeur, Marion | Mulvaney, Robert | Whitehouse, Pippa, L | Bentley, Michael, J | Bamber, Jonathan | Department of Physics and Physical Oceanography ; Memorial University of Newfoundland = Université Memorial de Terre-Neuve [St. John's, Canada] (MUN) | Department of Physics and Physical Oceanography ; Memorial University of Newfoundland = Université Memorial de Terre-Neuve [St. John's, Canada] (MUN) | Berkeley Geochronology Center (BGC) | British Antarctic Survey (BAS) ; Natural Environment Research Council (NERC) | College of Earth, Ocean and Atmospheric Sciences [Corvallis] (CEOAS) ; Oregon State University (OSU) | Institut des Géosciences de l’Environnement (IGE) ; Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Observatoire des Sciences de l'Univers de Grenoble (Fédération OSUG)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP) ; Université Grenoble Alpes (UGA) | Institute of Applied Physics "Nello Carrara" (IFAC) ; National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR) | Durham University | Department of Geography, Durham University ; Durham University | School of Geographical Sciences [Bristol] ; University of Bristol [Bristol] | Department of Aerospace and Geodesy, Data Science in Earth Observation, Technical University of Munich, Munich
International audience
Показать больше [+] Меньше [-]Английский. We present a database of observational constraints on past Antarctic Ice Sheet changes during the last glacial cycle intended to consolidate the observations that represent our understanding of past Antarctic changes and for state-space estimation and paleo-model calibrations. The database is a major expansion of the initial work of Briggs and Tarasov (2013). It includes new data types and multi-tier data quality assessment. The updated constraint database, AntICE2 (https://theghub.org/resources/4884, Lecavalier et al., 2022), consists of observations of past grounded- and floating-ice-sheet extent, past ice thickness, past relative sea level, borehole temperature profiles, and present-day bedrock displacement rates. In addition to paleo-observations, the present-day ice sheet geometry and surface ice velocities are incorporated to constrain the present-day ice sheet configuration. The method by which the data are curated using explicitly defined criteria is detailed. Moreover, the observational uncertainties are specified. The methodology by which the constraint database can be applied to evaluate a given ice sheet reconstruction is discussed. The implementation of the AntICE2 database for Antarctic Ice Sheet model calibrations will improve Antarctic Ice Sheet predictions during past warm and cold periods and yield more robust paleo-model spin ups for forecasting future ice sheet changes.
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Эту запись предоставил Institut national de la recherche agronomique