DOI: 10.1175/JCLI-D-17-0532.1
Scopus记录号: 2-s2.0-85047080846
论文题名: Salinity trends within the upper layers of the subpolar North Atlantic
作者: Tesdal J.-E. ; Abernathey R.P. ; Goes J.I. ; Gordon A.L. ; Haine T.W.N.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 7 起始页码: 2675
结束页码: 2698
语种: 英语
英文关键词: Arctic Oscillation
; Gyres
; North Atlantic Ocean
; North Atlantic Oscillation
; Ocean
; Salinity
Scopus关键词: Atmospheric pressure
; Surface waters
; Arctic Oscillation
; Gyres
; North Atlantic Ocean
; North Atlantic oscillations
; Ocean
; Salinity
; Oceanography
; air-sea interaction
; Arctic Oscillation
; gyre
; North Atlantic Oscillation
; salinity
; sea surface salinity
; stratification
; trend analysis
; water column
; wind field
; Atlantic Ocean
; Atlantic Ocean (North)
; Labrador Sea
英文摘要: Examination of a range of salinity products collectively suggests widespread freshening of the North Atlantic from the mid-2000s to the present. Monthly salinity fields reveal negative trends that differ in magnitude and significance between western and eastern regions of the North Atlantic. These differences can be attributed to the large negative interannual excursions in salinity in the western subpolar gyre and the Labrador Sea, which are not apparent in the central or eastern subpolar gyre. This study demonstrates that temporal trends in salinity in the northwest (including the Labrador Sea) are subject to mechanisms that are distinct from those responsible for the salinity trends in the central and eastern North Atlantic. In the western subpolar gyre a negative correlation between near-surface salinity and the circulation strength of the subpolar gyre suggests that negative salinity anomalies are connected to an intensification of the subpolar gyre, which is causing increased flux of freshwater from the East Greenland Current and subsequent transport into the Labrador Sea during the melting season. Analyses of sea surface wind fields suggest that the strength of the subpolar gyre is linked to the North Atlantic Oscillation- and Arctic Oscillation-driven changes in wind stress curl in the eastern subpolar gyre. If this trend of decreasing salinity continues, it has the potential to enhance water column stratification, reduce vertical fluxes of nutrients, and cause a decline in biological production and carbon export in the North Atlantic Ocean. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111568
Appears in Collections: 气候减缓与适应
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作者单位: Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States; Department of Earth and Planetary Sciences, The Johns Hopkins University, Baltimore, MD, United States
Recommended Citation:
Tesdal J.-E.,Abernathey R.P.,Goes J.I.,et al. Salinity trends within the upper layers of the subpolar North Atlantic[J]. Journal of Climate,2018-01-01,31(7)