Evaluation of high-frequency oceanographic signal in GRACE data: Implications for de-aliasing

Edited: 2011-09-20
TitleEvaluation of high-frequency oceanographic signal in GRACE data: Implications for de-aliasing
Publication TypeJournal Article
Year of Publication2011
AuthorsBonin, J., and D. Chambers
JournalGeophysical Research Letters
Volume38
Issue17
Date Published09/2011
ISSN0094-8276
Keywordsgrace, sea_level
AbstractThe sub-monthly portion of a recent daily-resolution GRACE data set (ITG-Grace2010) is evaluated over the ocean by comparing with the high-frequency component of sea level variability measured by satellite altimetry. The current Atmosphere and Ocean De-aliasing (AOD) model used to remove the high-frequency non-tidal ocean mass variations in GRACE data processing is also assessed. We demonstrate that the OMCT-based AOD model does not adequately represent the true sub-monthly variability in non-tidal ocean mass variability, but that ITG-Grace2010 does. The differences are not small, and indicate that a new model, or a data set derived from sub-monthly GRACE information, should be considered for de-aliasing in future GRACE processing.
DOI10.1029/2011GL048881
Short TitleGeophys. Res. Lett.