Recent Changes of Arctic Multiyear Sea Ice Coverage and the Likely Causes

被引:158
作者
Polyakov, Igor V. [1 ]
Walsh, John E. [1 ]
Kwok, Ronald [2 ]
机构
[1] Univ Alaska Fairbanks, Int Arctic Res Ctr, Fairbanks, AK 99775 USA
[2] CALTECH, Jet Prop Lab, Pasadena, CA USA
基金
美国国家科学基金会;
关键词
AMPLIFICATION; THICKNESS;
D O I
10.1175/BAMS-D-11-00070.1
中图分类号
P4 [大气科学(气象学)];
学科分类号
0706 ; 070601 ;
摘要
Recent changes of Arctic multiyear sea ice coverage and the likely causes are discussed. Changes of multiyear ice (MYI) coverage are dependent on the observed changes in surface air temperature (SAT). Records of fast-ice thickness provide annual measures of ice growth due almost entirely to atmospheric thermodynamic forcing over the vast and shallow Siberian shelves, there there is negligible deep ocean influence on local ice formation. Double-diffusive heat fluxes provide a means for transferring Atlantic Water (AW) heat upward over more than a 100-m depth range toward the upper halocline. The reduction of MYI is driven by, and perhaps even contributes to the albedo-temperature feedback. Thus, the rapid loss of sea ice in response to the atmospheric and oceanic forcing of the past decade appears to have introduced some degree of irreversibility.
引用
收藏
页码:145 / 151
页数:7
相关论文
共 32 条
[1]   Role of Polar Amplification in Long-Term Surface Air Temperature Variations and Modern Arctic Warming [J].
Bekryaev, Roman V. ;
Polyakov, Igor V. ;
Alexeev, Vladimir A. .
JOURNAL OF CLIMATE, 2010, 23 (14) :3888-3906
[2]   Fluctuating arctic sea ice thickness changes estimated by an in situ learned and empirically forced neural network model [J].
Belchansky, G. I. ;
Douglas, D. C. ;
Platonov, N. G. .
JOURNAL OF CLIMATE, 2008, 21 (04) :716-729
[3]   Accelerated decline in the Arctic Sea ice cover [J].
Comiso, Josefino C. ;
Parkinson, Claire L. ;
Gersten, Robert ;
Stock, Larry .
GEOPHYSICAL RESEARCH LETTERS, 2008, 35 (01)
[4]   Abrupt decline in the Arctic winter sea ice cover [J].
Comiso, Josefino C. .
GEOPHYSICAL RESEARCH LETTERS, 2006, 33 (18)
[5]   Toward a warmer Arctic Ocean: Spreading of the early 21st century Atlantic Water warm anomaly along the Eurasian Basin margins [J].
Dmitrenko, Igor A. ;
Polyakov, Igor V. ;
Kirillov, Sergey A. ;
Timokhov, Leonid A. ;
Frolov, Ivan E. ;
Sokolov, Vladimir T. ;
Simmons, Harper L. ;
Ivanov, Vladimir V. ;
Walsh, David .
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 2008, 113 (C5)
[6]   Decline in Arctic sea ice thickness from submarine and ICESat records: 1958-2008 [J].
Kwok, R. ;
Rothrock, D. A. .
GEOPHYSICAL RESEARCH LETTERS, 2009, 36
[7]   Outflow of Arctic Ocean Sea Ice into the Greenland and Barents Seas: 1979-2007 [J].
Kwok, R. .
JOURNAL OF CLIMATE, 2009, 22 (09) :2438-2457
[8]   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)
[9]   The thinning of Arctic sea ice [J].
Kwok, Ronald ;
Untersteiner, Norbert .
PHYSICS TODAY, 2011, 64 (04) :36-41
[10]   High interannual variability of sea ice thickness in the Arctic region [J].
Laxon, S ;
Peacock, N ;
Smith, D .
NATURE, 2003, 425 (6961) :947-950