The Extraordinary March 2022 East Antarctica "Heat" Wave. Part II: Impacts on the Antarctic Ice Sheet

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. ORCID: https://orcid.org/0000-0002-8868-4739; Casado, Mathieu; Choi, Taejin; Clem, Kyle R.; Codron, Francis; Datta, Rajashree; Di Battista, Stefano; 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. ORCID: https://orcid.org/0000-0003-3315-7568; Kittel, Christoph; Landais, Amaelle; Lazzara, Matthew; Leonard, Gregory H.; Lieser, Jan L.; Maclennan, Michelle; Mikolajczyk, David; Neff, Peter; Ollivier, Inès; Sprenger, Michael; Trusel, Luke; Udy, Danielle; Vance, Tessa; Vignon, Étienne; Walker, Catherine; Wever, Nander; Zou, Xun. 2024 The Extraordinary March 2022 East Antarctica "Heat" Wave. Part II: Impacts on the Antarctic Ice Sheet. Journal of Climate, 37 (3). 779-799. 10.1175/JCLI-D-23-0176.1

Before downloading, please read NORA policies.

Preview

Text (Open Access published article is licensed under the terms of the default AMS reuse license.) © 2024 American Meteorological Society. This published article is licensed under the terms of the default AMS reuse license. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses). clim-JCLI-D-23-0176.1.pdf - Published Version Download (44MB) | Preview

Abstract/Summary

Between 15 and 19 March 2022, East Antarctica experienced an exceptional heat wave 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) that caused these record-shattering temperature anomalies. Here, 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 that 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. Last, 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.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1175/JCLI-D-23-0176.1
ISSN:	0894-8755
Additional Keywords:	Antarctica; Ice shelves; Snow; Energy budget/balance; Paleoclimate
Related URLs:	https://nora.nerc.ac.uk/id/eprint/536267...
Date made live:	20 Nov 2023 08:57 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/536268

Actions (login required)

View Item

Document Downloads

More statistics for this item...