Anomalous Meltwater From Ice Sheets and Ice Shelves Is a Historical Forcing
Name
Geophysical Research Letters - 2023 - Schmidt - Anomalous Meltwater From Ice Sheets and Ice Shelves Is a Historical Forcing.pdf
Description
Published version
Size
1.94 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Schmidt, Gavin A
Romanou, Anastasia
Roach, Lettie A
Mankoff, Kenneth D
Li, Qian
Rye, Craig D
Kelley, Maxwell
Marshall, John C
Busecke, Julius JM
Date Issued
December 13, 2023
Journal
Geophysical Research Letters
Publisher
American Geophysical Union
Citation
Schmidt, Gavin A, Romanou, Anastasia, Roach, Lettie A, Mankoff, Kenneth D, Li, Qian et al. 2023. "Anomalous Meltwater From Ice Sheets and Ice Shelves Is a Historical Forcing." Geophysical Research Letters, 50 (24).
Version
Final published version
Abstract
Recent mass loss from ice sheets and ice shelves is now persistent and prolonged enough that it impacts downstream oceanographic conditions. To demonstrate this, we use an ensemble of coupled GISS‐E2.1‐G simulations forced with historical estimates of anomalous freshwater, in addition to other climate forcings, from 1990 through 2019. There are detectable differences in zonal‐mean sea surface temperatures (SST) and sea ice in the Southern Ocean, and in regional sea level around Antarctica and in the western North Atlantic. These impacts mostly improve the model's representation of historical changes, including reversing the forced trends in Antarctic sea ice. The changes in SST may have implications for estimates of the SST pattern effect on climate sensitivity and for cloud feedbacks. We conclude that the changes are sufficiently large that model groups should strive to include more accurate estimates of these drivers in all‐forcing historical simulations in future coupled model intercomparisons.
MIT Department
Massachusetts Institute of Technology. Program in Atmospheres, Oceans, and Climate
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Creative Commons Attribution
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DOI of Published Version
10.1029/2023gl106530
