KOPRI Repository

S2 tide aliasing in GRACE time-variable gravity solutions

Cited 32 time in scopus
Metadata Downloads
Title
S2 tide aliasing in GRACE time-variable gravity solutions
Other Titles
GRACE 중력변화를 이용한 S2 조석 신호 연구
Authors
Chen
Wilson
Seo, Ki-Weon
Subject
Geochemistry & Geophysics
Keywords
Alias error; GRACE; Gravity; Ocean tide; S2 tide; Remote Sensing
Issue Date
2009
Publisher
Springer
Citation
Chen, Wilson, Seo, Ki-Weon. 2009. "S2 tide aliasing in GRACE time-variable gravity solutions". Journal of Geodesy, 83: 679-687.
Abstract
Errors in high-frequency ocean tide models alias to lowfrequencies in time-variable gravity solutions from the Gravity Recovery and Climate Experiment (GRACE). We conduct an observational study of apparent gravity changes at a period of 161 days, the alias period of errors in the S2 semidiurnal solar tide. We examine this S2 alias in the release 4 (RL04) reprocessed GRACE monthly gravity solutions for the period April 2002 to February 2008, and compare with that in release 1 (RL01) GRACE solutions. One of the major differences between RL04 and RL01 is the ocean tide model. In RL01, the alias is evident at high latitudes, near the Filchner-Ronne and Ross ice shelves in Antarctica, and regions surrounding Greenland and Hudson Bay. RL04 shows significantly lower alias amplitudes in many of these locations, reflecting improvements in the ocean tide model. However, RL04 shows continued alias contamination between the Ronne and Larson ice shelves, somewhat larger than in RL01, indicating a need for further tide model improvement in that region. For unknown reasons, the degree-2 zonal spherical harmonics (C20) of the RL04 solutions show significantly larger S2 aliasing errors than those from RL01.
URI
http://repository.kopri.re.kr/handle/201206/6084
DOI
http://dx.doi.org/10.1007/s00190-008-0282-1
Files in This Item
General Conditions
      ROMEO Green
    Can archive pre-print and post-print or publisher's version/PDF
      ROMEO Blue
    Can archive post-print (ie final draft post-refereeing) or publisher's version/PDF
      ROMEO Yellow
    Can archive pre-print (ie pre-refereeing)
      ROMEO White
    Archiving not formally supported

    qrcode

    Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

    Browse