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Using an Altimeter-Derived Internal Tide Model to Remove Tides from in Situ DataInternal waves at tidal frequencies, i.e., the internal tides, are a prominent source of variability in the ocean associated with significant vertical isopycnal displacements and currents. Because the isopycnal displacements are caused by ageostrophic dynamics, they contribute uncertainty to geostrophic transport inferred from vertical profiles in the ocean. Here it is demonstrated that a newly developed model of the main semidiurnal (M2) internal tide derived from satellite altimetry may be used to partially remove the tide from vertical profile data, as measured by the reduction of steric height variance inferred from the profiles. It is further demonstrated that the internal tide model can account for a component of the near-surface velocity as measured by drogued drifters. These comparisons represent a validation of the internal tide model using independent data and highlight its potential use in removing internal tide signals from in situ observations.
Document ID
20170007845
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Zaron, Edward D. (Portland State Univ. OR, United States)
Ray, Richard D. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Date Acquired
August 18, 2017
Publication Date
May 14, 2017
Publication Information
Publication: Geophysical Research Letters
Volume: 44
Issue: 9
ISSN: 0094-8276
Subject Category
Oceanography
Report/Patent Number
GSFC-E-DAA-TN45570
Funding Number(s)
CONTRACT_GRANT: NNX09AF20G
Distribution Limits
Public
Copyright
Other