A younger, thinner Arctic ice cover: Increased potential for rapid, extensive sea-ice loss

被引：535

作者：

Maslanik, J. A. ^{[1
]}

Fowler, C. ^{[1
]}

Stroeve, J. ^{[2
]}

Drobot, S. ^{[1
]}

Zwally, J. ^{[3
]}

Yi, D. ^{[3
]}

Emery, W. ^{[1
]}

机构：

[1] Univ Colorado, Colorado Ctr Astrodynam Res, Boulder, CO 80309 USA

[2] Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA

[3] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2007年 / 34卷 / 24期

关键词：

D O I：

10.1029/2007GL032043

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Satellite-derived estimates of sea-ice age and thickness are combined to produce a proxy ice thickness record for 1982 to the present. These data show that in addition to the well-documented loss of perennial ice cover as a whole, the amount of oldest and thickest ice within the remaining multiyear ice pack has declined significantly. The oldest ice types have essentially disappeared, and 58% of the multiyear ice now consists of relatively young 2-and 3-year-old ice compared to 35% in the mid-1980s. Ice coverage in summer 2007 reached a record minimum, with ice extent declining by 42% compared to conditions in the 1980s. The much-reduced extent of the oldest and thickest ice, in combination with other factors such as ice transport that assist the ice-albedo feedback by exposing more open water, help explain this large and abrupt ice loss.

引用

页数：5

共 22 条

[1] Spatial and temporal multiyear sea ice distributions in the Arctic: A neural network analysis of SSM/I data, 1988-2001 [J].

Belchansky, GI ;

Douglas, DC ;

Alpatsky, IV ;

Platonov, NG .

JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 2004, 109 (C10) :C100171-17

[2] Abrupt decline in the Arctic winter sea ice cover [J].

Comiso, Josefino C. .

GEOPHYSICAL RESEARCH LETTERS, 2006, 33 (18)

[3] Satellite-Derived Evolution of Arctic Sea Ice Age: October 1978 to March 2003 [J].

Fowler, C. ;

Emery, W. J. ;

Maslanik, J. .

IEEE GEOSCIENCE AND REMOTE SENSING LETTERS, 2004, 1 (02) :71-74

[4]

Fowler C., 2003, POLAR PATHFINDER DAI

[5]

Holloway G, 2002, J CLIMATE, V15, P1691, DOI 10.1175/1520-0442(2002)015<1691:HASIRT>2.0.CO

[6]

[7] Satellite evidence for an Arctic sea ice cover in transformation [J].

Johannessen, OM ;

Shalina, EV ;

Miles, MW .

SCIENCE, 1999, 286 (5446) :1937-1939

[8]

Kovacs A, 1996, SEA ICE PART 2 ESTIM

[9] ICESat observations of Arctic sea ice: A first look [J].

Kwok, R ;

Zwally, HJ ;

Yi, DH .

GEOPHYSICAL RESEARCH LETTERS, 2004, 31 (16) :L164011-5

[10] Near zero replenishment of the Arctic multiyear sea ice cover at the end of 2005 summer [J].

Kwok, Ron .

GEOPHYSICAL RESEARCH LETTERS, 2007, 34 (05)

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