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Determining the Ocean's Role on the Variable Gravity Field on Earth RotationA number of ocean models of different complexity have been used to study changes in the oceanic mass field and angular momentum and their relation to the variable Earth rotation and gravity field. Time scales examined range from seasonal to a few days. Results point to the importance of oceanic signals in driving polar motion, in particular the Chandler and annual wobbles. Results also show that oceanic signals have a measurable impact on length-of-day variations. Various circulation features and associated mass signals, including the North Pacific subtropical gyre, the equatorial currents, and the Antarctic Circumpolar Current play a significant role in oceanic angular momentum variability.
Document ID
20000021311
Document Type
Contractor or Grantee Report
Authors
Ponte, Rui M. (Atmospheric and Environmental Research, Inc. Cambridge, MA United States)
Date Acquired
August 19, 2013
Publication Date
November 11, 1999
Subject Category
Oceanography
Funding Number(s)
CONTRACT_GRANT: NAS5-97270
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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