Reduced Deep Convection and Bottom Water Formation Due To Antarctic Meltwater in a Multi‐Model Ensemble
Name
Geophysical Research Letters - 2023 - Chen - Reduced Deep Convection and Bottom Water Formation Due To Antarctic Meltwater.pdf
Description
Published version
Size
1.74 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Chen, Jia‐Jia
Swart, Neil C
Beadling, Rebecca
Cheng, Xuhua
Hattermann, Tore
Jüling, André
Li, Qian
Marshall, John
Martin, Torge
Muilwijk, Morven
Date Issued
December 19, 2023
Journal
Geophysical Research Letters
Publisher
American Geophysical Union
Citation
Chen, J.-J., Swart, N. C., Beadling, R., Cheng, X., Hattermann, T., Jüling, A., et al. (2023). Reduced deep convection and bottom water formation due to Antarctic meltwater in a multi-model ensemble. Geophysical Research Letters, 50, e2023GL106492.
Version
Final published version
Abstract
The additional water from the Antarctic ice sheet and ice shelves due to climate‐induced melt can impact ocean circulation and global climate. However, the major processes driving melt are not adequately represented in Coupled Model Intercomparison Project phase 6 (CMIP6) models. Here, we analyze a novel multi‐model ensemble of CMIP6 models with consistent meltwater addition to examine the robustness of the modeled response to meltwater, which has not been possible in previous single‐model studies. Antarctic meltwater addition induces a substantial weakening of open‐ocean deep convection. Additionally, Antarctic Bottom Water warms, its volume contracts, and the sea surface cools. However, the magnitude of the reduction varies greatly across models, with differing anomalies correlated with their respective mean‐state climatology, indicating the state‐dependency of the climate response to meltwater. A better representation of the Southern Ocean mean state is necessary for narrowing the inter‐model spread of response to Antarctic meltwater.
MIT Department
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivatives
Persistent DSpace Link
DOI of Published Version
10.1029/2023gl106492
