A Complete Formula of Ocean Surface Absolute Geostrophic Current
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Authors
Chu, Peter C.
Subjects
Advisors
Date of Issue
2020
Date
2020
Publisher
Springer
Language
Abstract
Absolute geostrophic current at the ocean surface (S) contains three components: (1) absolute geostrophic current at the geoid undulation (N), (2) geostrophic shear (between S and N) due to horizontal gradient of dynamic ocean topography, and (3) geostrophic shear (between S and N) due to horizontal gradient of density. However, only the second component is used to represent the surface absolute geostrophic current in physical oceanography and satellite geodesy. Four public datasets
are used to calculate each component. Evident difference between the surface absolute geostrophic current and the second component (i.e., geostrophic shear due to horizontal gradient of dynamic ocean topography) was found by the statistical characteristics with the relative root mean square difference of 0.605. It shows that the common practice in physical oceanography and satellite geodesy is not correct. The horizontal gradient of dynamic ocean topography alone cannot be claimed as the surface absolute geostrophic current.
Type
Article
Description
The article of record as published may be found at https://doi.org/10.1038/s41598-020-58458-w
Supplementary information is available for this paper at https://doi.org/10.1038/s41598-020-58458-w
Supplementary information is available for this paper at https://doi.org/10.1038/s41598-020-58458-w
Series/Report No
Department
Oceanography
Organization
Identifiers
NPS Report Number
Sponsors
Naval Postgraduate School
Funder
Format
10 p.
Citation
Chu, Peter C. "A complete formula of ocean Surface Absolute Geostrophic current." Scientific Reports 10.1 (2020): 1-9.
Distribution Statement
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.