Evaluation of high-frequency oceanographic signal in GRACE data: Implications for de-aliasing
Edited: 2011-09-20
| Title | Evaluation of high-frequency oceanographic signal in GRACE data: Implications for de-aliasing |
| Publication Type | Journal Article |
| Year of Publication | 2011 |
| Authors | Bonin, J., and D. Chambers |
| Journal | Geophysical Research Letters |
| Volume | 38 |
| Issue | 17 |
| Date Published | 09/2011 |
| ISSN | 0094-8276 |
| Keywords | grace, sea_level |
| Abstract | The 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. |
| DOI | 10.1029/2011GL048881 |
| Short Title | Geophys. Res. Lett. |