Zuheir ALTAMIMI - Implication de l'IGN dans les ... - Recherche
Zuheir ALTAMIMI - Implication de l'IGN dans les ... - Recherche
Zuheir ALTAMIMI - Implication de l'IGN dans les ... - Recherche
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Impact of Terrestrial Reference Frame on Global Mean Sea<br />
Level Estimate (CSR95 + ITRF2000 vs. ITRF2005)<br />
Mean radial orbit differences by cycle, computed between orbits based on the ITRF2005<br />
reference frame and the GGM02 (Grace-<strong>de</strong>rived) gravity mo<strong>de</strong>l and those on the<br />
TOPEX/Poseidon MGDR-B (CSR95) and Jason-1 GDR-B (ITRF2000) GDR’s. Differences are<br />
sampled only over the oceans. The very low frequency signature of the differences maps directly<br />
into the estimated global MSL trend. Shorter periods of 5 – 7 years reveal significant rates of<br />
change exceeding 0.4 mm/yr.<br />
Update to: Beckley, B., F. Lemoine, S. Luthcke, R. Ray, and N. Zelensky (2007),<br />
A reassessment of global and regional mean sea level trends from TOPEX and Jason-1 altimetry<br />
based on revised reference frame and orbits,<br />
Geophysical Research Letters, doi:101029/2007GL030002.<br />
Journées <strong>Recherche</strong> IGN 11 mars 2009<br />
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