Ice-Shelf Melting Around Antarctica

被引：984

作者：

Rignot, E. ^{[1
,2
]}

Jacobs, S. ^{[3
]}

Mouginot, J. ^{[1
]}

Scheuchl, B. ^{[1
]}

机构：

[1] Univ Calif Irvine, Dept Earth Syst Sci, Irvine, CA 92697 USA

[2] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

[3] Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY 10964 USA

来源：

SCIENCE | 2013年 / 341卷 / 6143期

基金：

美国国家科学基金会; 美国海洋和大气管理局;

关键词：

PINE ISLAND GLACIER; MASS-BALANCE; SHEET; CIRCULATION; THICKNESS; CAVITY;

D O I：

10.1126/science.1235798

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

We compare the volume flux divergence of Antarctic ice shelves in 2007 and 2008 with 1979 to 2010 surface accumulation and 2003 to 2008 thinning to determine their rates of melting and mass balance. Basal melt of 1325 +/- 235 gigatons per year (Gt/year) exceeds a calving flux of 1089 +/- 139 Gt/year, making ice-shelf melting the largest ablation process in Antarctica. The giant cold-cavity Ross, Filchner, and Ronne ice shelves covering two-thirds of the total ice-shelf area account for only 15% of net melting. Half of the meltwater comes from 10 small, warm-cavity Southeast Pacific ice shelves occupying 8% of the area. A similar high melt/area ratio is found for six East Antarctic ice shelves, implying undocumented strong ocean thermal forcing on their deep grounding lines.

引用

页码：266 / 270

页数：5

共 36 条

[1]

Allen C., 2010, ICEBRIDGE MCORDS L2

[2]

[Anonymous], 2010, PHYS GLACIERS, DOI DOI 10.3189/002214311796405906

[3]

[Anonymous], 2005, Principles of glacier mechanics

[4]

Barkov N. I., 1985, ICE SHELVES ANTARCTI

[5]

Blankenship D. D., 2012, IceBridge HiCARS 2 L2 Geolocated Ice Thickness, Version 1", Distributed by

[6] Current measurements near Ronne Ice Shelf: Implications for circulation and melting [J].

Foldvik, A ;

Gammelsrod, T ;

Nygaard, E ;

Osterhus, S .

JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 2001, 106 (C3) :4463-4477

[7] Bedmap2: improved ice bed, surface and thickness datasets for Antarctica [J].

Fretwell, P. ;

Pritchard, H. D. ;

Vaughan, D. G. ;

Bamber, J. L. ;

Barrand, N. E. ;

Bell, R. ;

Bianchi, C. ;

Bingham, R. G. ;

Blankenship, D. D. ;

Casassa, G. ;

Catania, G. ;

Callens, D. ;

Conway, H. ;

Cook, A. J. ;

Corr, H. F. J. ;

Damaske, D. ;

Damm, V. ;

Ferraccioli, F. ;

Forsberg, R. ;

Fujita, S. ;

Gim, Y. ;

Gogineni, P. ;

Griggs, J. A. ;

Hindmarsh, R. C. A. ;

Holmlund, P. ;

Holt, J. W. ;

Jacobel, R. W. ;

Jenkins, A. ;

Jokat, W. ;

Jordan, T. ;

King, E. C. ;

Kohler, J. ;

Krabill, W. ;

Riger-Kusk, M. ;

Langley, K. A. ;

Leitchenkov, G. ;

Leuschen, C. ;

Luyendyk, B. P. ;

Matsuoka, K. ;

Mouginot, J. ;

Nitsche, F. O. ;

Nogi, Y. ;

Nost, O. A. ;

Popov, S. V. ;

Rignot, E. ;

Rippin, D. M. ;

Rivera, A. ;

Roberts, J. ;

Ross, N. ;

Siegert, M. J. .

CRYOSPHERE, 2013, 7 (01) :375-393

[8] Antarctic ice-shelf thickness from satellite radar altimetry [J].

Griggs, J. A. ;

Bamber, J. L. .

JOURNAL OF GLACIOLOGY, 2011, 57 (203) :485-498

[9]

Grosfeld K, 1998, ANTARCT RES SER, V75, P319

[10] Twenty-first-century warming of a large Antarctic ice-shelf cavity by a redirected coastal current [J].

Hellmer, Hartmut H. ;

Kauker, Frank ;

Timmermann, Ralph ;

Determann, Juergen ;

Rae, Jamie .

NATURE, 2012, 485 (7397) :225-228

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