Arctic Ocean basin liquid freshwater storage trend 1992-2012

被引：154

作者：

Rabe, B. ^{[1
]}

Karcher, M. ^{[1
,2
]}

Kauker, F. ^{[1
,2
]}

Schauer, U. ^{[1
]}

Toole, J. M. ^{[3
]}

Krishfield, R. A. ^{[3
]}

Pisarev, S. ^{[4
]}

Kikuchi, T. ^{[5
]}

Su, J. ^{[6
]}

机构：

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

[2] OASys, Hamburg, Germany

[3] Woods Hole Oceanog Inst, Woods Hole, MA 02543 USA

[4] PP Shirshov Oceanol Inst, Moscow, Russia

[5] Japan Agcy Marine Earth Sci & Technol, Yokosuka, Kanagawa 2370061, Japan

[6] Ocean Univ China, Key Lab Phys Oceanog, Qingdao, Peoples R China

来源：

GEOPHYSICAL RESEARCH LETTERS | 2014年 / 41卷 / 03期

基金：

美国国家科学基金会;

关键词：

Arctic; liquid freshwater; observation; model; THERMOHALINE CIRCULATION; NORTH-ATLANTIC; ICE; OSCILLATION; HALOCLINE; LAYER;

D O I：

10.1002/2013GL058121

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Freshwater in the Arctic Ocean plays an important role in the regional ocean circulation, sea ice, and global climate. From salinity observed by a variety of platforms, we are able, for the first time, to estimate a statistically reliable liquid freshwater trend from monthly gridded fields over all upper Arctic Ocean basins. From 1992 to 2012 this trend was 600300 km(3) yr(-1). A numerical model agrees very well with the observed freshwater changes. A decrease in salinity made up about two thirds of the freshwater trend and a thickening of the upper layer up to one third. The Arctic Ocean Oscillation index, a measure for the regional wind stress curl, correlated well with our freshwater time series. No clear relation to Arctic Oscillation or Arctic Dipole indices could be found. Following other observational studies, an increased Bering Strait freshwater import to the Arctic Ocean, a decreased Davis Strait export, and enhanced net sea ice melt could have played an important role in the freshwater trend we observed.

引用

页码：961 / 968

页数：8

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