DOI: 10.1002/2017JC013702
Scopus记录号: 2-s2.0-85045894827
论文题名: The Deep Western Boundary Current in the Labrador Sea From Observations and a High-Resolution Model
作者: Handmann P. ; Fischer J. ; Visbeck M. ; Karstensen J. ; Biastoch A. ; Böning C. ; Patara L.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 4 起始页码: 2829
结束页码: 2850
语种: 英语
英文关键词: DWBC
; Labrador Sea
; ocean circulation
; ocean model and observations comparison
; subpolar North Atlantic
Scopus关键词: annual variation
; buoyancy forcing
; comparative study
; mixed layer
; North Atlantic Deep Water
; numerical model
; observational method
; oceanic circulation
; temporal evolution
; western boundary current
; wind stress
; Atlantic Ocean
; Atlantic Ocean (North)
; Labrador Sea
英文摘要: Long-term observations from a 17 year long mooring array at the exit of the Labrador Sea at 53°N are compared to the output of a high-resolution model (VIKING20). Both are analyzed to define robust integral properties on basin and regional scale, which can be determined and evaluated equally well. While both, the observations and the model, show a narrow DWBC cyclonically engulfing the Labrador Sea, the model's boundary current system is more barotropic than in the observations and spectral analysis indicates stronger monthly to interannual transport variability. Compared to the model, the observations show a stronger density gradient, hence a stronger baroclinicity, from center to boundary. Despite this, the observed temporal evolution of the temperature in the central Labrador Sea is reproduced. The model results yield a mean export of North Atlantic Deep Water (NADW) (33.0 ± 5.7 Sv), which is comparable to the observed transport (31.2 ± 5.5 Sv) at 53°N. The results also include a comparable spatial pattern and March mixed layer depth in the central Labrador Sea (maximum depth ∼2,000 m). During periods containing enhanced deep convection (1990s) our analyses show increased correlation between LSW and LNADW model transport at 53°N. Our results indicate that the transport variability in LSW and LNADW at 53°N is a result of a complex modulation of wind stress and buoyancy forcing on regional and basin wide scale. © 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/114155
Appears in Collections: 气候减缓与适应
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作者单位: GEOMAR, Helmholz Centre for Ocean Research, Kiel, Germany; Kiel University, Kiel, Germany
Recommended Citation:
Handmann P.,Fischer J.,Visbeck M.,et al. The Deep Western Boundary Current in the Labrador Sea From Observations and a High-Resolution Model[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(4)