Article (Scientific journals)
Wind-Associated Melt Trends and Contrasts Between the Greenland and Antarctic Ice Sheets
Laffin, Matthew K.; Zender, Charles S.; van Wessem, Melchior et al.
2023In Geophysical Research Letters, 50 (16)
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Keywords :
Antarctic ice sheets; Downslope winds; Greenland Ice Sheet; Hydrofractures; Ice sheet; Ice shelves; Katabatic winds; Regional climate model simulation; Run-off; Sheet surface; Geophysics; Earth and Planetary Sciences (all); General Earth and Planetary Sciences
Abstract :
[en] Föhn and katabatic winds (downslope winds) can increase ice sheet surface melt, run-off, and ice-shelf vulnerability to hydrofracture and are poorly constrained on the Greenland and Antarctic ice sheets (GIS and AIS). We use regional climate model simulations of the GIS and AIS to quantify and intercompare trends in downslope winds and associated melt since 1960. Results reveal surface melt associated with downslope wind is significant on both the GIS and AIS representing 27.5 ± 4.5% and 19.7 ± 3.8% of total surface melt respectively. Wind-associated melt has decreased 31.8 ± 5.3% on the AIS while total melt decreased 15.4 ± 2.4% due to decreased föhn-induced melt on the Antarctic Peninsula and increasing stratospheric ozone. Wind-associated melt has increased 10.3 ± 2.5% on the GIS, combining with a more positive North Atlantic Oscillation and warmer surface to increase total melt 34 ± 5.8%.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Laffin, Matthew K. ;  Department of Earth System Science, University of California Irvine, Irvine, United States
Zender, Charles S. ;  Department of Earth System Science, University of California Irvine, Irvine, United States ; Department of Computer Science, University of California Irvine, Irvine, United States
van Wessem, Melchior;  Institute for Marine and Atmospheric Research Utrecht (IMAU), Utrecht University, Utrecht, Netherlands
Noël, Brice  ;  Université de Liège - ULiège > Département de géographie > Climatologie et Topoclimatologie ; Institute for Marine and Atmospheric Research Utrecht (IMAU), Utrecht University, Utrecht, Netherlands
Wang, Wenshan ;  Department of Earth System Science, University of California Irvine, Irvine, United States
Language :
English
Title :
Wind-Associated Melt Trends and Contrasts Between the Greenland and Antarctic Ice Sheets
Publication date :
28 August 2023
Journal title :
Geophysical Research Letters
ISSN :
0094-8276
eISSN :
1944-8007
Publisher :
John Wiley and Sons Inc
Volume :
50
Issue :
16
Peer reviewed :
Peer Reviewed verified by ORBi
Funding text :
MKL was supported by the National Science Foundation (NRT‐1633631) and NASA AIST (80NSSC17K0540). CSZ and WW gratefully acknowledges support from the DOE BER ESM and SciDAC programs (DE‐SC0019278, LLNL‐B641620, LANL‐520117). JMVW acknowledges support by PROTECT and was partly funded by the NWO (Netherlands Organisation for Scientific Research) VENI Grant VI.Veni.192.083. BN was funded by the NWO VENI Grant VI.Veni.192.019. We also thank the Institute for Marine and Atmospheric research Utrecht (IMAU) for providing RACMO2 output.MKL was supported by the National Science Foundation (NRT-1633631) and NASA AIST (80NSSC17K0540). CSZ and WW gratefully acknowledges support from the DOE BER ESM and SciDAC programs (DE-SC0019278, LLNL-B641620, LANL-520117). JMVW acknowledges support by PROTECT and was partly funded by the NWO (Netherlands Organisation for Scientific Research) VENI Grant VI.Veni.192.083. BN was funded by the NWO VENI Grant VI.Veni.192.019. We also thank the Institute for Marine and Atmospheric research Utrecht (IMAU) for providing RACMO2 output.
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