Steric sea-level variations inferred from combined Topex/Poseidon altimetry and GRACE gravimetry
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Title: | Steric sea-level variations inferred from combined Topex/Poseidon altimetry and GRACE gravimetry |
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Authors: | Garcia-Garcia, David | Ramillien, Guillaume | Lombard, Alix | Cazenave, Anny |
Research Group/s: | Geodesia Espacial y Dinámica Espacial |
Center, Department or Service: | Universidad de Alicante. Departamento de Matemática Aplicada | LEGOS, Observatoire Midi-Pyrénées, Toulouse, France |
Keywords: | GRACE time-variable gravity | Global ocean | Steric sea level | Ocean mass change | TOPEX/poseidon altimetry | Hydrographic data |
Knowledge Area: | Matemática Aplicada |
Date Created: | 2007 |
Issue Date: | Apr-2007 |
Publisher: | Birkhäuser Verlag |
Citation: | GARCÍA, David, et al. "Steric sea-level variations inferred from combined Topex/Poseidon altimetry and GRACE gravimetry". Pure and Applied Geophysics. Vol. 164, No. 4 (Apr. 2007). ISSN 0033-4553, pp. 721-731 |
Abstract: | In this study, we propose to estimate the steric sea-level variations over a < 2-year period (April 2002 through December 2003) by combining global mean sea level (GMSL) based on Topex/ Poseidon (T/P) altimetry with time-variable geoid averaged over the oceans, as observed by the GRACE (Gravity Recovery and Climate Experiment) satellite. In effect, altimetry-derived GMSL changes results from two contributions: Steric (thermal plus salinity) effects due to sea water density change and ocean mass change due to water exchange with atmosphere and continents. On the other hand, GRACE data over the oceans provide the ocean mass change component only. The paper first discusses the corrections to apply to the GRACE data. Then the steric contribution to the GMSL is estimated using GRACE and T/P data. Comparison with available thermal expansion based on in situ hydrographic data is performed. |
URI: | http://hdl.handle.net/10045/20070 |
ISSN: | 0033-4553 (Print) | 1420-9136 (Online) |
DOI: | 10.1007/s00024-007-0182-y |
Language: | eng |
Type: | info:eu-repo/semantics/article |
Rights: | The original publication is available at www.springerlink.com |
Peer Review: | si |
Publisher version: | http://dx.doi.org/10.1007/s00024-007-0182-y |
Appears in Collections: | INV - GEDE - Artículos de Revistas |
Files in This Item:
File | Description | Size | Format | |
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Garciaetal_PAGEOPH_2007.pdf | Versión revisada (acceso abierto) | 1,26 MB | Adobe PDF | Open Preview |
Garciaetal_PAGEOPH_2007_final.pdf | Versión final (acceso restringido) | 308,23 kB | Adobe PDF | Open Request a copy |
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