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Abstract
A new synthetic model of the time-variable global gravity field is now available based on realistic mass variability in atmosphere, oceans, terrestrial water storage, continental ice-sheets, and the solid Earth. The updated ESA Earth System Model is provided in Stokes coefficients up to degree and order 180 with a temporal resolution of 6 h covering the time period 1995–2006, and can be readily applied as a source model in future gravity mission simulation studies. The model contains plausible variability and trends in both low-degree coefficients and the global mean eustatic sea level. It depicts reasonable mass variability all over the globe at a wide range of frequencies including multi-year trends, year-to-year variability, and seasonal variability even at very fine spatial scales, which is important for a realistic representation of spatial aliasing and leakage. In particular on these small spatial scales between 50 and 250 km, the model contains a range of signals that have not been reliably observed yet by satellite gravimetry. In addition, the updated Earth System Model provides substantial high-frequency variability at periods down to a few hours only, thereby allowing to critically test strategies for the minimization of temporal aliasing.
Originalsprog | Engelsk |
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Tidsskrift | Journal of Geodesy |
Vol/bind | 89 |
Sider (fra-til) | 505–513 |
ISSN | 0949-7714 |
DOI | |
Status | Udgivet - 4 jan. 2015 |
Udgivet eksternt | Ja |
Fingeraftryk
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The Updated ESA Earth System Model for Gravity Mission Simulation Studies (ESA ESM)
Dobslaw, H., Kusche, J. & Forootan, E.
01/12/2013 → 01/07/2015
Projekter: Projekt › Forskning