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- PP42B-04: Water Isotope Model Intercomparison Project (WisoMIP): Present-day Climate (invited)
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NOLA CC
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Hayoung Bong, NASA Goddard Institute for Space Studies (First Author, Presenting Author)
Allegra LeGrande, NASA Goddard Institute for Space Studies
Sylvia Dee, Rice University
Jiang Zhu, NSF National Center for Atmospheric Research
Alexandre Cauquoin, The University of Tokyo
Rich Fiorella, Los Alamos National Laboratory
Qinghua Ding, University of California Santa Barbara
Niels Dutrievoz, Laboratoire des Sciences du Climat et de l’Environnement
Masahiro Tanoue, Meteorological Research Institute
Michelle Frazer, Rice University
Mampi Sarkar, Rice University
Cécile Agosta, Laboratoire des Sciences du Climat et de l’Environnement
Kei Yoshimura, The University of Tokyo
Martin Werner, Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research
Atsushi Okazaki, Chiba University
Camille Risi, Laboratoire de Météorologie Dynamique
Hans Christian Steen-Larsen, University of Bergen
Mathieu Casado, Laboratoire des Sciences du Climat et de l’Environnement
Sonja Wahl, University of Bergen
Jesse Nusbaumer, National Center for Atmospheric Research
John Worden, Jet Propulsion Laboratory, California Institute of Technology
Stephen Good, Oregon State University
Adriana Raudzens Bailey, University of Michigan
Matthias Schneider, Karlsruhe Institute of Technology
Stefan Noel, University of Bremen
Soumyajit Mandal, Space Research Organisation Netherlands
Kevin W. Bowman, Jet Propulsion Laboratory, California Institute of Technology
Yifan Li, The University of Tokyo
Gavin Schmidt, NASA Goddard Institute for Space Studies
Water molecules can have slightly different weights depending on the types of hydrogen and oxygen atoms they contain. These are called water isotopologues, or more simply, water isotopes. This study focuses on stable water isotopes, which serve as natural fingerprints that help track how water moves through the atmosphere, oceans, and land. They are especially useful for studying cloud processes, rainfall, temperature, and humidity, and can even reveal past climate conditions using ice cores or cave deposits. Many climate models can now simulate water isotopes, but they often produce different results, making it difficult to assess accuracy. To address this, the international Water Isotope Model Intercomparison Project (WisoMIP) tested several leading climate models by using the same conditions for winds, sea surface temperatures, and sea ice. This study compares WisoMIP model simulations over the period 1979–2023. By analyzing the models side by side and evaluating them against observations, the project identifies where the models agree, where they diverge, and why. These insights improve our understanding of water movement in the climate system and help refine climate models. The WisoMIP dataset offers a valuable global resource for studying Earth's water cycle now and under future climate change.
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