DOI: 10.1002/2015GL067235
论文题名: Variability of the directly observed, middepth subpolar North Atlantic circulation
作者: Palter J.B. ; Caron C.-A. ; Law K.L. ; Willis J.K. ; Trossman D.S. ; Yashayaev I.M. ; Gilbert D.
刊名: Geophysical Research Letters
ISSN: 0094-9257
EISSN: 1944-8988
出版年: 2016
卷: 43, 期: 6 起始页码: 2700
结束页码: 2708
语种: 英语
英文关键词: Argo
; boundary currents
; decadal variability
; ocean circulation
; profiling floats
; subpolar North Atlantic
Scopus关键词: Bathymetry
; Hydrographic surveys
; Ocean currents
; Uncertainty analysis
; Argo
; Boundary currents
; Decadal variability
; Ocean circulation
; Profiling float
; Subpolar North Atlantic
; Oceanography
; Argo
; bathymetry
; boundary current
; decadal variation
; oceanic circulation
; profiler
; satellite altimetry
; water depth
; Atlantic Ocean
; Labrador Sea
; Mid-Atlantic Ridge
; North Atlantic Current
英文摘要: Satellite views of the ocean have suggested a decline of the subpolar North Atlantic surface circulation during the 1990s and 2000s. This was a period of unprecedented observational capacity in the basin, thanks to the presence of many hundreds of profiling floats. We use more than 40,000 subsurface displacements of these floats to characterize the circulation at 1000 m depth, and its evolution from 1997-2013. We show a statistically significant slowdown in the Labrador Sea boundary currents of -0.8 cm s-1 per decade (95% confidence interval of -1.4 to -0.15 cm s-1 per decade, a conservative estimate of the uncertainty). Otherwise, the middepth circulation field was largely stable. Our analysis of the location where the North Atlantic Current crosses the Mid-Atlantic Ridge shows that profiling floats can reveal steering by bathymetric features, but do not reveal of decadal variability in the position where the current crosses the ridge. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84977950774&doi=10.1002%2f2015GL067235&partnerID=40&md5=094ba78d1cca8ec52d538866a618935a
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10220
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Graduate School of Oceanography, University of Rhode Island, Kingston, RI, United States
Recommended Citation:
Palter J.B.,Caron C.-A.,Law K.L.,et al. Variability of the directly observed, middepth subpolar North Atlantic circulation[J]. Geophysical Research Letters,2016-01-01,43(6).