DOI: 10.1002/2017JC013350
Scopus记录号: 2-s2.0-85044086904
论文题名: Seasonal Cycles of Oceanic Transports in the Eastern Subpolar North Atlantic
作者: Gary S.F. ; Cunningham S.A. ; Johnson C. ; Houpert L. ; Holliday N.P. ; Behrens E. ; Biastoch A. ; Böning C.W.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 2 起始页码: 1471
结束页码: 1484
语种: 英语
英文关键词: geostrophic transport
; hydrographic data quality control
; Meridional Overturning Circulation
; Subpolar North Atlantic
Scopus关键词: climate prediction
; geostrophic flow
; hydrographic survey
; meridional circulation
; observational method
; quality control
; sea surface temperature
; seasonal variation
; volume transport
; wind stress
; Arctic
; Atlantic Ocean
; Atlantic Ocean (North)
; Greenland
; Rockall Trough
; Scotland
; United Kingdom
英文摘要: The variability of the Atlantic Meridional Overturning Circulation (AMOC) may play a role in sea surface temperature predictions on seasonal to decadal time scales. Therefore, AMOC seasonal cycles are a potential baseline for interpreting predictions. Here we present estimates for the seasonal cycle of transports of volume, temperature, and freshwater associated with the upper limb of the AMOC in the eastern subpolar North Atlantic on the Extended Ellett Line hydrographic section between Scotland and Iceland. Due to weather, ship-based observations are primarily in summer. Recent glider observations during other seasons present an opportunity to investigate the seasonal variability in the upper layer of the AMOC. First, we document a new method to quality control and merge ship, float, and glider hydrographic observations. This method accounts for the different spatial sampling rates of the three platforms. The merged observations are used to compute seasonal cycles of volume, temperature, and freshwater transports in the Rockall Trough. These estimates are similar to the seasonal cycles in two eddy-resolving ocean models. Volume transport appears to be the primary factor modulating other Rockall Trough transports. Finally, we show that the weakest transports occur in summer, consistent with seasonal changes in the regional-scale wind stress curl. Although the seasonal cycle is weak compared to other variability in this region, the amplitude of the seasonal cycle in the Rockall Trough, roughly 0.5–1 Sv about a mean of 3.4 Sv, may account for up to 7–14% of the heat flux between Scotland and Greenland. © 2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114498
Appears in Collections: 气候减缓与适应
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作者单位: SAMS, Scottish Marine Institute, Oban, United Kingdom; National Oceanography Centre, European Way, Southampton, United Kingdom; National Institute for Water and Atmospheric Research (NIWA)Wellington, New Zealand; GEOMAR—Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
Recommended Citation:
Gary S.F.,Cunningham S.A.,Johnson C.,et al. Seasonal Cycles of Oceanic Transports in the Eastern Subpolar North Atlantic[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(2)