DOI: 10.1002/2017JC013508
Scopus记录号: 2-s2.0-85040862615
论文题名: Variability of the Labrador Sea Surface Eddy Kinetic Energy Observed by Altimeter From 1993 to 2012
作者: Zhang W. ; Yan X.-H.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 1 起始页码: 601
结束页码: 612
语种: 英语
英文关键词: convection
; eddy kinetic energy
; EEMD
; restratification
Scopus关键词: altimeter
; annual variation
; circulation
; convection
; data set
; eddy
; energy flux
; gyre
; heat flux
; kinetic energy
; North Atlantic Oscillation
; oceanic current
; sea surface
; stratification
; temperature profile
; wind stress
; Arctic Ocean
; Atlantic Ocean
; Irminger Sea
; Labrador Sea
; West Greenland Shelf
英文摘要: A merged along track altimeter data set is used to study the variability of eddy kinetic energy (EKE) in the Labrador Sea from 1993 to 2012. The EKE near the west Greenland current (WGC) has strong interannual variability without long-term trend from 1993 to 2012. The propagation direction of the Irminger Rings (IRs) originating from the WGC can be inferred from the EKE derived from altimeter, and the southward propagation of the IRs varies interannually. The central Labrador Sea EKE increases significantly from 1993 to 2012. The central Labrador Sea temperature difference between the end and the beginning of the winter convections is defined as restratification index to measure the restratification strengths. The relation between the central Labrador Sea EKE and the restratification index shows that the enhanced eddy activity originating from the west of the central Labrador Sea may cool the central Labrador Sea significantly. The interannual variability of the WGC EKE is likely to be driven by the large scale Subpolar Gyre (SPG) circulation variability and the North Atlantic Oscillation (NAO). The NAO also affects the central Labrador Sea EKE through its fingerprint in the local wind stress and surface heat flux. The NAO affects the WGC EKE by changing the SPG circulation strength, which will subsequently affect the WGC EKE through unknown physical processes. © 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/114789
Appears in Collections: 气候减缓与适应
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作者单位: State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, Fujian, China; Laboratory for Regional Oceanography and Numerical Modeling, National Laboratory for Marine Science and Technology, Qingdao, Shandong, China; College of Earth, Ocean, and Environment, University of Delaware, Newark, DE, United States; College of Ocean and Earth Sciences, Xiamen University, 4221 Xiang'An Nan Lu, Xiamen, Fujian, China
Recommended Citation:
Zhang W.,Yan X.-H.. Variability of the Labrador Sea Surface Eddy Kinetic Energy Observed by Altimeter From 1993 to 2012[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(1)