DOI: 10.1002/2014GL062402
论文题名: Improving the geoid: Combining altimetry and mean dynamic topography in the California coastal ocean
作者: Mazloff M.R. ; Gille S.T. ; Cornuelle B.
刊名: Geophysical Research Letters
ISSN: 0094-9444
EISSN: 1944-9175
出版年: 2014
卷: 41, 期: 24 起始页码: 8944
结束页码: 8952
语种: 英语
英文关键词: altimetry
; dynamic ocean topography
; geoid
; gravity
; sea surface height
; state estimation
Scopus关键词: Gravitation
; Oceanography
; State estimation
; Surface topography
; Surface waters
; Topography
; Uncertainty analysis
; Altimetric observations
; altimetry
; California current systems
; geoid
; Horizontal resolution
; Mean dynamic topographies
; Ocean topography
; Sea surface height
; Planetary surface analysis
; accuracy assessment
; altimetry
; atmospheric correction
; geoid
; resolution
; satellite imagery
; topography
; uncertainty analysis
; California
; United States
英文摘要: Satellite gravity mapping missions, altimeters, and other platforms have allowed the Earth's geoid to be mapped over the ocean to a horizontal resolution of approximately 100 km with an uncertainty of less than 10 cm. At finer resolution this uncertainty increases to greater than 10 cm. Achieving greater accuracy requires accurate estimates of the dynamic ocean topography (DOT). In this study two DOT estimates for the California Current System with uncertainties less than 10 cm are used to solve for a geoid correction field. The derived field increases the consistency between the DOTs and along-track altimetric observations, suggesting it is a useful correction to the gravitational field. The correction is large compared to the dynamic ocean topography, with a magnitude of 15 cm and significant structure, especially near the coast. The results are evidence that modern high-resolution dynamic ocean topography products can be used to improve estimates of the geoid. Key PointsWe present a procedure to improve geoid models using ocean topography estimatesOcean topography products can correct geoid modelsThe uncertainty of ocean topography measurements in this region is given ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84921768965&doi=10.1002%2f2014GL062402&partnerID=40&md5=200e79ae0b50d535cfc2cdd89df4482e
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6708
Appears in Collections: 气候减缓与适应
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作者单位: Scripps Institution of Oceanography, University of California, San Diego, San Diego, CA, United States
Recommended Citation:
Mazloff M.R.,Gille S.T.,Cornuelle B.. Improving the geoid: Combining altimetry and mean dynamic topography in the California coastal ocean[J]. Geophysical Research Letters,2014-01-01,41(24).