Zuheir ALTAMIMI - Implication de l'IGN dans les ... - Recherche

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Conséquence de la dérive Tz (ITRF2000 =>ITRF2005) sur les vitesses verticales Journées Recherche IGN 11 mars 2009 36
Global and Regional Mean Sea Level Trends from TOPEX/Poseidon and Jason-1 Altimetry 1993 – 2008 MSL rate = 3.21± 0.41 mm/yr 1993-1998 Mean=3.02 mm/yr 2003-2008 Mean=2.10 mm/yr Global mean sea level (MSL) variations are estimated from the combined 16 year record of T/P and Jason-1 altimetry based on revised orbits adhering to a consistent terrestrial reference frame (ITRF2005)and unified geophysical modeling. The thin red curve is the global Reynolds’ sea surface temperature variations for comparison. The MSL linear rate of 3.21 mm/yr (no GIA adjustment) is derived after removal of annual and semi-annual signals. The global MSL rate is modulated by inter-decadal type signals (such as El Nino and La Nina). The top right figure shows regional MSL rates during the development of the 1997 El Niño while the lower figure shows impact of current La Niña conditions. The launch of OSTM (Jason-2) will further extend the TOPEX & Jason-1 altimeter data time series and will improve detection of subtle longer-period signals and allow a better understanding of their impact on future MSL trends. Journées Recherche IGN 11 mars 2009 mm/yr Beckley, B., F. Lemoine, S. Luthcke, R. Ray, and N. Zelensky, NASA Goddard Space Flight Center, May 2008 37
Page 1 and 2: Contributions scientifiques de l’
Page 3 and 4: La géodésie • Discipline fondam
Page 5 and 6: La géodésie contribue à la compr
Page 7 and 8: Association Internationale de Géod
Page 9 and 10: Global Geodetic Observing System (G
Page 11 and 12: Association Internationale de Géod
Page 13 and 14: Centre d’analyse DORIS pour l’I
Page 15 and 16: Comparaison des signaux annuels ent
Page 17 and 18: IDS-1Intrinsic Origin and Scale Jou
Page 19 and 20: Centre d’analyse GRGS de l’ILRS
Page 21 and 22: IERS Structure Journées Recherche
Page 23 and 24: The International Terrestrial Refer
Page 25 and 26: Current Co-locations (2007) Journé
Page 27 and 28: Current Co-locations DORIS-GPS (37)
Page 29 and 30: Le logiciel CATREF Combination and
Page 31 and 32: SLR Origin & Scale Variation (wrt I
Page 33 and 34: Conséquence de la dérive Tz (ITRF
Page 35: Impact of the Terrestrial Reference
Page 39 and 40: TIGA: GPS velocities at TG... How w
Page 41 and 42: GPS Mean Residuals (effets de surch
Page 43 and 44: Pacific Africa Amur Antarctica Arab
Page 45 and 46: First Galileo Terrestrial Reference
Page 47: • L’importance: Mot de la fin -

Zuheir ALTAMIMI - Implication de l'IGN dans les ... - Recherche

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