Ocean temperature thresholds for Last Interglacial West Antarctic Ice Sheet collapse

被引：55

作者：

Sutter, Johannes ^{[1
]}

Gierz, Paul ^{[1
]}

Grosfeld, Klaus ^{[1
]}

Thoma, Malte ^{[1
]}

Lohmann, Gerrit ^{[1
,2
]}

机构：

[1] Alfred Wegener Inst Polar & Marine Res, Paleoclimate Dynam, Bremerhaven, Germany

[2] Univ Bremen, MARUM Ctr Marine Environm Sci, D-28359 Bremen, Germany

来源：

GEOPHYSICAL RESEARCH LETTERS | 2016年 / 43卷 / 06期

关键词：

SEA-LEVEL RISE; PINE ISLAND; DISCHARGE; RETREAT; VARIABILITY; THWAITES; MELT;

D O I：

10.1002/2016GL067818

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The West Antarctic Ice Sheet (WAIS) is considered the major contributor to global sea level rise in the Last Interglacial (LIG) and potentially in the future. Exposed fossil reef terraces suggest sea levels in excess of 7m in the last warm era, of which probably not much more than 2 m are considered to originate from melting of the Greenland Ice Sheet. We simulate the evolution of the Antarctic Ice Sheet during the LIG with a 3-D thermomechanical ice sheet model forced by an atmosphere-ocean general circulation model (AOGCM). Our results show that high LIG sea levels cannot be reproduced with the atmosphere-ocean forcing delivered by current AOGCMs. However, when taking reconstructed Southern Ocean temperature anomalies of several degrees, sensitivity studies indicate a Southern Ocean temperature anomaly threshold for total WAIS collapse of 2-3 degrees C, accounting for a sea level rise of 3-4m during the LIG. Potential future Antarctic Ice Sheet dynamics range from a moderate retreat to a complete collapse, depending on rate and amplitude of warming.

引用

页码：2675 / 2682

页数：8

共 43 条

[1] Reassessment of the Potential Sea-Level Rise from a Collapse of the West Antarctic Ice Sheet [J].

Bamber, Jonathan L. ;

Riva, Riccardo E. M. ;

Vermeersen, Bert L. A. ;

LeBrocq, Anne M. .

SCIENCE, 2009, 324 (5929) :901-903

[2] Interhemispheric Atlantic seesaw response during the last deglaciation [J].

Barker, Stephen ;

Diz, Paula ;

Vautravers, Maryline J. ;

Pike, Jennifer ;

Knorr, Gregor ;

Hall, Ian R. ;

Broecker, Wallace S. .

NATURE, 2009, 457 (7233) :1097-U50

[3] A parameterization of ice shelf-ocean interaction for climate models [J].

Beckmann, A ;

Goosse, H .

OCEAN MODELLING, 2003, 5 (02) :157-170

[4] Temporal and spatial structure of multi-millennial temperature changes at high latitudes during the Last Interglacial [J].

Capron, Emilie ;

Govin, Aline ;

Stone, Emma J. ;

Masson-Delmotte, Valerie ;

Mulitza, Stefan ;

Otto-Bliesner, Bette ;

Rasmussen, Tine L. ;

Sime, Louise C. ;

Waelbroeck, Claire ;

Wolff, Eric W. .

QUATERNARY SCIENCE REVIEWS, 2014, 103 :116-133

[5] Eemian interglacial reconstructed from a Greenland folded ice core [J].

Dahl-Jensen, D. ;

Albert, M. R. ;

Aldahan, A. ;

Azuma, N. ;

Balslev-Clausen, D. ;

Baumgartner, M. ;

Berggren, A. -M. ;

Bigler, M. ;

Binder, T. ;

Blunier, T. ;

Bourgeois, J. C. ;

Brook, E. J. ;

Buchardt, S. L. ;

Buizert, C. ;

Capron, E. ;

Chappellaz, J. ;

Chung, J. ;

Clausen, H. B. ;

Cvijanovic, I. ;

Davies, S. M. ;

Ditlevsen, P. ;

Eicher, O. ;

Fischer, H. ;

Fisher, D. A. ;

Fleet, L. G. ;

Gfeller, G. ;

Gkinis, V. ;

Gogineni, S. ;

Goto-Azuma, K. ;

Grinsted, A. ;

Gudlaugsdottir, H. ;

Guillevic, M. ;

Hansen, S. B. ;

Hansson, M. ;

Hirabayashi, M. ;

Hong, S. ;

Hur, S. D. ;

Huybrechts, P. ;

Hvidberg, C. S. ;

Iizuka, Y. ;

Jenk, T. ;

Johnsen, S. J. ;

Jones, T. R. ;

Jouzel, J. ;

Karlsson, N. B. ;

Kawamura, K. ;

Keegan, K. ;

Kettner, E. ;

Kipfstuhl, S. ;

Kjaer, H. A. .

NATURE, 2013, 493 (7433) :489-494

[6] Calving fluxes and basal melt rates of Antarctic ice shelves [J].

Depoorter, M. A. ;

Bamber, J. L. ;

Griggs, J. A. ;

Lenaerts, J. T. M. ;

Ligtenberg, S. R. M. ;

van den Broeke, M. R. ;

Moholdt, G. .

NATURE, 2013, 502 (7469) :89-+

[7] Tropical tales of polar ice: evidence of Last Interglacial polar ice sheet retreat recorded by fossil reefs of the granitic Seychelles islands [J].

Dutton, Andrea ;

Webster, Jody M. ;

Zwartz, Dan ;

Lambeck, Kurt ;

Wohlfarth, Barbara .

QUATERNARY SCIENCE REVIEWS, 2015, 107 :182-196

[8] Testing the sensitivity of the East Antarctic Ice Sheet to Southern Ocean dynamics: past changes and future implications [J].

Fogwill, Christopher J. ;

Turney, Christian S. M. ;

Meissner, Katrin J. ;

Golledge, Nicholas R. ;

Spence, Paul ;

Roberts, Jason L. ;

England, Mathew H. ;

Jones, Richard T. ;

Carter, Lionel .

JOURNAL OF QUATERNARY SCIENCE, 2014, 29 (01) :91-98

[9] Response of Atlantic overturning to future warming in a coupled atmosphere-ocean-ice sheet model [J].

Gierz, Paul ;

Lohmann, Gerrit ;

Wei, Wei .

GEOPHYSICAL RESEARCH LETTERS, 2015, 42 (16) :6811-6818

[10] The multi-millennial Antarctic commitment to future sea-level rise [J].

Golledge, N. R. ;

Kowalewski, D. E. ;

Naish, T. R. ;

Levy, R. H. ;

Fogwill, C. J. ;

Gasson, E. G. W. .

NATURE, 2015, 526 (7573) :421-+

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