Changes in freshwater content in the North Atlantic Ocean 1955-2006

被引：48

作者：

Boyer, Tim ^{[1
]}

Levitus, Syd

Antonov, John

Locarnini, Ricardo

Mishonov, Alexey

Garcia, Hernan

Josey, Simon A.

机构：

[1] NOAA, Natl Oceanogr Data Ctr, Silver Spring, MD 20910 USA

[2] Natl Oceanog Ctr, Southampton, Hants, England

来源：

GEOPHYSICAL RESEARCH LETTERS | 2007年 / 34卷 / 16期

基金：

英国自然环境研究理事会;

关键词：

D O I：

10.1029/2007GL030126

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Freshwater content changes (FW) for the North Atlantic Ocean (NA) are calculated from in situ salinity profiles for the period 1955-2006 from the surface to 2,000 meters. Heat content (HC) is also calculated from in situ temperature profiles for comparison. A decrease in FW between 1955 and 2006 of similar to 30,000 km 3 is found for the NA, despite an increase in FW of similar to 16,000 km 3 in the subpolar North Atlantic (SNA) and Nordic Seas between the late 1960s and the early 1990s. Over the last two decades there is a pattern of decreasing FW in the upper 400 meters and increasing FW below 1,300 meters for the NA. FW and HC are strongly negatively correlated for both the SNA (r = -0.93) and the NA ( r = -0.79). Net precipitation, from NCEP/NCAR, is found to have a strong influence on FW changes in the SNA but this relation is weaker elsewhere.

引用

页数：5

共 10 条

[1]

ANTONOVJO, 2005, WORLD OCEAN ATLAS, V62

[2]

Boyer T.P., 2005, NOAA ATLAS NESDIS

[3] A change in the freshwater balance of the Atlantic Ocean over the past four decades [J].

Curry, R ;

Dickson, B ;

Yashayaev, I .

NATURE, 2003, 426 (6968) :826-829

[4] Dilution of the northern North Atlantic Ocean in recent decades [J].

Curry, R ;

Mauritzen, C .

SCIENCE, 2005, 308 (5729) :1772-1774

[5] THE GREAT SALINITY ANOMALY IN THE NORTHERN NORTH-ATLANTIC 1968-1982 [J].

DICKSON, RR ;

MEINCKE, J ;

MALMBERG, SA ;

LEE, AJ .

PROGRESS IN OCEANOGRAPHY, 1988, 20 (02) :103-151

[6] Influence of the Atlantic subpolar gyre on the thermohaline circulation [J].

Hátún, H ;

Sando, AB ;

Drange, H ;

Hansen, B ;

Valdimarsson, H .

SCIENCE, 2005, 309 (5742) :1841-1844

[7] Surface freshwater flux variability and recent freshening of the North Atlantic in the eastern subpolar gyre [J].

Josey, SA ;

Marsh, R .

JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 2005, 110 (C5) :1-17

[8] Trajectory shifts in the Arctic and subarctic freshwater cycle [J].

Peterson, Bruce J. ;

McClelland, James ;

Curry, Ruth ;

Holmes, Robert M. ;

Walsh, John E. ;

Aagaard, Knut .

SCIENCE, 2006, 313 (5790) :1061-1066

[9] Multidecadal variability of North Atlantic temperature and salinity during the twentieth century [J].

Polyakov, IV ;

Bhatt, US ;

Simmons, HL ;

Walsh, D ;

Walsh, JE ;

Zhang, X .

JOURNAL OF CLIMATE, 2005, 18 (21) :4562-4581

[10] Tracing the flow of North Atlantic Deep Water using chlorofluorocarbons [J].

Smethie, WM ;

Fine, RA ;

Putzka, A ;

Jones, EP .

JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 2000, 105 (C6) :14297-14323

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