DOI: 10.1002/2017JC013400
Scopus记录号: 2-s2.0-85045929618
论文题名: Reconstruction of the 3-D Dynamics From Surface Variables in a High-Resolution Simulation of North Atlantic
作者: Fresnay S. ; Ponte A.L. ; Le Gentil S. ; Le Sommer J.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 3 起始页码: 1612
结束页码: 1630
语种: 英语
英文关键词: correlation analysis
; ocean dynamics
; potential vorticity
; quasi-geostrophy
; sea surface height
; spectral analysis
Scopus关键词: correlation
; potential vorticity
; quasi-geostrophic flow
; reconstruction
; satellite altimetry
; sea level change
; sea surface height
; sea surface salinity
; sea surface temperature
; simulation
; spatial resolution
; spectral analysis
; three-dimensional modeling
; wavelength
; Atlantic Ocean
; Atlantic Ocean (North)
; Gulf Stream
英文摘要: Several methods that reconstruct the three-dimensional ocean dynamics from sea level are presented and evaluated in the Gulf Stream region with a 1/60° realistic numerical simulation. The use of sea level is motivated by its better correlation with interior pressure or quasi-geostrophic potential vorticity (PV) compared to sea surface temperature and sea surface salinity, and, by its observability via satellite altimetry. The simplest method of reconstruction relies on a linear estimation of pressure at depth from sea level. Another method consists in linearly estimating PV from sea level first and then performing a PV inversion. The last method considered, labeled SQG for surface quasi-geostrophy, relies on a PV inversion but assumes no PV anomalies. The first two methods show comparable skill at levels above −800 m. They moderately outperform SQG which emphasizes the difficulty of estimating interior PV from surface variables. Over the 250–1,000 m depth range, the three methods skillfully reconstruct pressure at wavelengths between 500 and 200 km whereas they exhibit a rapid loss of skill between 200 and 100 km wavelengths. Applicability to a real case scenario and leads for improvements are discussed. © 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/114399
Appears in Collections: 气候减缓与适应
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作者单位: OceanDataLab, Brest, France; Univ. Brest, CNRS, IRD, Ifremer, Laboratoire d'Océanographie Physique et Spatiale, IUEM, Brest, France; Univ. Grenoble-Alpes, CNRS, IRD, IGE, Grenoble, France
Recommended Citation:
Fresnay S.,Ponte A.L.,Le Gentil S.,et al. Reconstruction of the 3-D Dynamics From Surface Variables in a High-Resolution Simulation of North Atlantic[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(3)