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Acceleration signal in GRACE time-variable gravity in relation to interannual hydrological changes
| Title: | Acceleration signal in GRACE time-variable gravity in relation to interannual hydrological changes |
| Authors: | Ogawa, Ryoko Browse this author | | Chao, Benjamin F. Browse this author | | Heki, Kosuke Browse this author →KAKEN DB |
| Keywords: | Satellite geodesy | | Time variable gravity | | Global change from geodesy | | Hydrology |
| Issue Date: | Feb-2011 |
| Publisher: | the Royal Astronomical Society and Blackwell Publishing |
| Journal Title: | Geophysical Journal International |
| Volume: | 184 |
| Issue: | 2 |
| Start Page: | 673 |
| End Page: | 679 |
| Publisher DOI: | 10.1111/j.1365-246X.2010.04843.x |
| Abstract: | We use 6 yr of data of the GRACE (Gravity Recovery and Climate Experiment) satellite mission, which yield estimation for interannual signals in gravity changes. We solve for such signals in the form of not only linear trend but also quadratic term (acceleration/deceleration) of mass variations globally at a spatial resolution of 500 km. On continents they signify hydrological mass transport, where any linear trend in precipitation minus evepotranspiration is the input to and hence responsible for, the quadratic change in continental water storage and hence in gravity. Comparison studies of geographical patterns of the quadratic (representing acceleration/ deceleration) terms show interesting agreement of the hydrological model GLDAS with GRACE data in many major areas, providing independent assessment as to the quality and validity of the hydrological models for interannual applications. |
| Rights: | The definitive version is available at www.blackwell-synergy.com |
| Type: | article |
| URI: | http://hdl.handle.net/2115/44791 |
| Appears in Collections: | 理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 日置 幸介
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