Antarctic Glacial Melt as a Driver of Recent Southern Ocean Climate Trends

被引：40

作者：

Rye, Craig D. ^{[1
]}

Marshall, John ^{[2
]}

Kelley, Maxwell ^{[3
]}

Russell, Gary ^{[3
]}

Nazarenko, Larissa S. ^{[3
]}

Kostov, Yavor ^{[4
]}

Schmidt, Gavin A. ^{[3
]}

Hansen, James ^{[1
]}

机构：

[1] Columbia Univ, Ctr Climate Syst Res, New York, NY 10027 USA

[2] MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA USA

[3] NASA, Goddard Inst Space Studies, New York, NY 10025 USA

[4] Univ Exeter, Atmospher & Ocean Sci, Exeter, Devon, England

来源：

GEOPHYSICAL RESEARCH LETTERS | 2020年 / 47卷 / 11期

关键词：

Antarctica; melt; ice shelf; Southern Ocean; sea surface temperature; sea ice; SEA-LEVEL RISE; FRESH-WATER; ICE SHELVES; ANNULAR MODE; SENSITIVITY; COVER;

D O I：

10.1029/2019GL086892

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Recent trends in Southern Ocean (SO) climate-of surface cooling, freshening, and sea ice expansion-are not captured in historical climate simulations. Here we demonstrate that the addition of a plausible increase in Antarctic meltwater to a coupled climate model can produce a closer match to a wide range of climate trends. We use an ensemble of simulations of the Goddard Institute for Space Studies Earth system model to compute "climate response functions" (CRFs) for the addition of meltwater. These imply a cooling and freshening of the SO, an expansion of sea ice, and an increase in steric height, all consistent with observations since 1992. The CRF framework allows one to compare the efficacy of Antarctic meltwater as a driver of SO climate trends, relative to greenhouse gas and surface wind forcing. The meltwater CRFs presented here strongly suggest that interactive Antarctic ice melt should be included in climate models.

引用

页数：9

共 37 条

[1] Abernathey RP, 2016, NAT GEOSCI, V9, P596, DOI [10.1038/ngeo2749, 10.1038/NGEO2749]
[2] Sensitivity of the present-day climate to freshwater forcing associated with Antarctic sea ice loss
Aiken, Christopher M.
England, Matthew H.
[J]. JOURNAL OF CLIMATE, 2008, 21 (15) : 3936 - 3946
[3] [Anonymous], 2001, OBSERVING OCEAN CLIM
[4] [Anonymous], 2018, CLIMATE DYNAMICS
[5] The effect of increased fresh water from Antarctic ice shelves on future trends in Antarctic sea ice
Bintanja, R.
Van Oldenborgh, G. J.
Katsman, C. A.
[J]. ANNALS OF GLACIOLOGY, 2015, 56 (69) : 120 - 126
[6] Bintanja R, 2013, NAT GEOSCI, V6, P376, DOI [10.1038/NGEO1767, 10.1038/ngeo1767]
[7] An Assessment of Precipitation Changes over Antarctica and the Southern Ocean since 1989 in Contemporary Global Reanalyses
Bromwich, David H.
Nicolas, Julien P.
Monaghan, Andrew J.
[J]. JOURNAL OF CLIMATE, 2011, 24 (16) : 4189 - 4209
[8] Change in future climate due to Antarctic meltwater
Bronselaer, Ben
Winton, Michael
Griffies, Stephen M.
Hurlin, William J.
Rodgers, Keith B.
Sergienko, Olga V.
Stouffer, Ronald J.
Russell, Joellen L.
[J]. NATURE, 2018, 564 (7734) : 53 - +
[9] A record of atmospheric halocarbons during the twentieth century from polar firn air
Butler, JH
Battle, M
Bender, ML
Montzka, SA
Clarke, AD
Saltzman, ES
Sucher, CM
Severinghaus, JP
Elkins, JW
[J]. NATURE, 1999, 399 (6738) : 749 - 755
[10] The CORA dataset: validation and diagnostics of in-situ ocean temperature and salinity measurements
Cabanes, C.
Grouazel, A.
von Schuckmann, K.
Hamon, M.
Turpin, V.
Coatanoan, C.
Paris, F.
Guinehut, S.
Boone, C.
Ferry, N.
Montegut, C. de Boyer
Carval, T.
Reverdin, G.
Pouliquen, S.
Le Traon, P. -Y.
[J]. OCEAN SCIENCE, 2013, 9 (01) : 1 - 18

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