The extraordinary March 2022 East Antarctica “heat” wave. Part II: impacts on the Antarctic ice sheet

International audience Between March 15-19, 2022, East Antarctica experienced an exceptional heatwave with widespread 30-40° C temperature anomalies across the ice sheet. In Part I, we assessed the meteorological drivers that generated an intense atmospheric river (AR) which caused these record-shat...

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Bibliographic Details
Published in:Journal of Climate
Main Authors: Wille, Jonathan, D, Alexander, Simon, P, Amory, Charles, Baiman, Rebecca, Barthélemy, Léonard, Bergstrom, Dana, M, Berne, Alexis, Binder, Hanin, Blanchet, Juliette, Bozkurt, Deniz, Bracegirdle, Thomas, J, Casado, Mathieu, Choi, Taejin, Clem, Kyle, R, Codron, Francis, Datta, Rajashree, Battista, Stefano Di, Favier, Vincent, Francis, Diana, Fraser, Alexander, D, Fourré, Elise, Garreaud, René, D, Genthon, Christophe, Gorodetskaya, Irina, V, González-Herrero, Sergi, Heinrich, Victoria, J, Hubert, Guillaume, Joos, Hanna, Kim, Seong-Joong, King, John, C, Kittel, Christoph, Landais, Amaelle, Lazzara, Matthew, Leonard, Gregory, H, Lieser, Jan, L, Maclennan, Michelle, Mikolajczyk, David, Neff, Peter, Ollivier, Inès, Picard, Ghislain, Pohl, Benjamin, Ralph, F. Martin, Rowe, Penny, Schlosser, Elisabeth, Shields, Christine, A, Smith, Inga, J, Sprenger, Michael, Trusel, Luke, Udy, Danielle, Vance, Tessa, Vignon, Étienne, Walker, Catherine, Wever, Nander, Zou, Xun
Other Authors: 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)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Loyola University Chicago, Department of Atmospheric and Oceanic Sciences Boulder (ATOC), University of Colorado Boulder, Océan et variabilité du climat (VARCLIM), Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN), Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Ecole Polytechnique Fédérale de Lausanne (EPFL), Institute for Atmospheric and Climate Science Zürich (IAC), Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology Zürich (ETH Zürich), Laboratoire de Météorologie Dynamique (UMR 8539) (LMD), Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Universidad de Valparaiso Chile, British Antarctic Survey (BAS), Natural Environment Research Council (NERC), Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Korea Polar Research Institute (KOPRI), Sorbonne Université (SU), Université Pierre et Marie Curie - Paris 6 (UPMC), Environmental and Geophysical Sciences Lab (ENGEOS Lab), Khalifa University, Institute for Marine and Antarctic Studies Hobart (IMAS), University of Tasmania Hobart, Australia (UTAS), Glaces et Continents, Climats et Isotopes Stables (GLACCIOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Departamento de Geofísica Santiago, Universidad de Chile = University of Chile Santiago (UCHILE), Centre for Environmental and Marine Studies Aveiro (CESAM), Universidade de Aveiro, SLF Institut pour l'étude de la neige et des avalanches (SLF), SLF, Agencia Estatal de Meteorología (AEMet), ONERA / DPHY, Université de Toulouse Toulouse, ONERA-PRES Université de Toulouse, University of Rhode Island (URI), Space Science and Engineering Center Madison (SSEC), University of Wisconsin-Madison, University of Minnesota, Bjerknes Centre for Climate Research (BCCR), Department of Biological Sciences Bergen (BIO / UiB), University of Bergen (UiB)-University of Bergen (UiB)
Format: Article in Journal/Newspaper
Language:English
Published: HAL CCSD 2024
Subjects:
Online Access:https://hal.science/hal-04289361
https://hal.science/hal-04289361/document
https://hal.science/hal-04289361/file/clim-JCLI-D-23-0176.1.pdf
https://doi.org/10.1175/JCLI-D-23-0176.1
Description
Summary:International audience Between March 15-19, 2022, East Antarctica experienced an exceptional heatwave with widespread 30-40° C temperature anomalies across the ice sheet. In Part I, we assessed the meteorological drivers that generated an intense atmospheric river (AR) which caused these record-shattering temperature anomalies. Here in Part II, we continue our large, collaborative study by analyzing the widespread and diverse impacts driven by the AR landfall. These impacts included widespread rain and surface melt which was recorded along coastal areas, but this was outweighed by widespread, high snowfall accumulations resulting in a largely positive surface mass balance contribution to the East Antarctic region. An analysis of the surface energy budget indicated that widespread downward longwave radiation anomalies caused by large cloud-liquid water contents along with some scattered solar radiation produced intense surface warming. Isotope measurements of the moisture were highly elevated, likely imprinting a strong signal for past climate reconstructions. The AR event attenuated cosmic ray measurements at Concordia, something previously never observed. Finally, an extratropical cyclone west of the AR landfall likely triggered the final collapse of the critically unstable Conger Ice Shelf while further reducing an already record low sea-ice extent.