Polar oceans and sea ice in a changing climate

• Published in: Elem Sci Anth
• Main Authors: Willis, Megan, D, Lannuzel, Delphine, Else, Brent, Angot, Hélène, Campbell, Karley, Crabeck, Odile, Delille, Bruno, Hayashida, Hakase, Lizotte, Martine, Loose, Brice, Meiners, Klaus, M, Miller, Lisa, Moreau, Sebastien, Nomura, Daiki, Prytherch, John, Schmale, Julia, Steiner, Nadja, Tedesco, Letizia, Thomas, Jennie
• Other Authors: Colorado State University Fort Collins (CSU), University of Tasmania Hobart, Australia (UTAS), University of Calgary, 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), The Arctic University of Norway Tromsø, Norway (UiT), Université de Liège, Université libre de Bruxelles (ULB), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Takuvik Joint International Laboratory (IRL3376), Centre National de la Recherche Scientifique (CNRS), Graduate School of Oceanography Narragansett, University of Rhode Island (URI), Institute of Ocean Sciences, Fisheries and Oceans Canada, Norwegian Polar Institute, Hokkaido University of Science, Stockholm University, Ecole Polytechnique Fédérale de Lausanne (EPFL), Finnish Environment Institute (SYKE)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2023
• Subjects: Arctic Ocean Southern Ocean Atmosphere Sea ice Ocean; Arctic Ocean; Southern Ocean; Atmosphere; Sea ice; Ocean; [SDE]Environmental Sciences; [SDE.ES]Environmental Sciences/Environment and Society; [SDE.MCG]Environmental Sciences/Global Changes; [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces; environment; [SDU.OCEAN]Sciences of the Universe [physics]/Ocean; Climate change
• Online Access: https://hal.science/hal-04382605; https://hal.science/hal-04382605/document; https://hal.science/hal-04382605/file/Willis%20et%20al.%20-%202023%20-%20Polar%20oceans%20and%20sea%20ice%20in%20a%20changing%20climate.pdf; https://doi.org/10.1525/elementa.2023.00056

International audience Polar oceans and sea ice cover 15% of the Earth's ocean surface, and the environment is changing rapidly at both poles. Improving knowledge on the interactions between the atmospheric and oceanic realms in the polar regions, a Surface Ocean-Lower Atmosphere Study (SOLAS) project key focus, is essential to understanding the Earth system in the context of climate change. However, our ability to monitor the pace and magnitude of changes in the polar regions and evaluate their impacts for the rest of the globe is limited by both remoteness and sea-ice coverage. Sea ice not only supports biological activity and mediates gas and aerosol exchange but can also hinder some in-situ and remote sensing observations. While satellite remote sensing provides the baseline climate record for sea-ice properties and extent, these techniques cannot provide key variables within and below sea ice. Recent robotics, modeling, and in-situ measurement advances have opened new possibilities for understanding the ocean-sea ice-atmosphere system, but critical knowledge gaps remain. Seasonal and long-term observations are clearly lacking across all variables and phases. Observational and modeling efforts across the sea-ice, ocean, and atmospheric domains must be better linked to achieve a system-level understanding of polar ocean and sea-ice environments. As polar oceans are warming and sea ice is becoming thinner and more ephemeral than before, dramatic changes over a suite of physicochemical and biogeochemical processes are expected, if not already underway. These changes in sea-ice and ocean conditions will affect atmospheric processes by modifying the production of aerosols, aerosol precursors, reactive halogens and oxidants, and the exchange of greenhouse gases. Quantifying which processes will be enhanced or reduced by climate change calls for tailored monitoring programs for high-latitude ocean environments. Open questions in this coupled system will be best resolved by leveraging ongoing international and ...