Artikel getaggt mit "GRACE"

Antarctic ice-mass balance

Gepostet am Dez 18, 2012 | Keine Kommentare

Antarctic ice-mass balance

Presentation and introduction to the topic of antarctic ice-mass balances and the improvement of its estimate for the past 5 years. For further reading please see: Sasgen, I.; Konrad, H.; Ivins, E.R.; van den Broeke; M.R.; Bamber, J.L.; Martinec, Z.; Klemann, V.: Antarctic ice-mass balance 2002 to 2011: regional re-analysis of GRACE satellite gravimetry measurements with improved estimate of glacial-isostatic adjustment, The Cryosphere Discuss., 6, 3703-3732, doi:10.5194/tcd-6-3703-2012, 2012. http://www.esa.int/Our_Activities/Observing_the_Earth/Space_for_our_climate/Clearest_evidence_yet_of_polar_ice_losses Antarctic ice-mass balance 2002 to 2011 from Sasgen et al. Table of Contents The author of the study Glacial Isostatic Adjustment (GIA) and its concept Limitation for GIA modeling Setup and techniques of Sasgen Statistical Approach for GIA modeling and ice-mass estimation using GRACE and GPS data GIA estimation errors and their influence on the estimate Final results for different calculation models Keyfacts out of the study Graphical representation and comparison with past studies Briefly introduction to current ESA/NASA study published recently in Science Major compliance for aquired satellite data of the past 20 years GRACE gravity measurement explanation Input-Output method and its key...

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GRACE: melting land ice

Gepostet am Jul 26, 2012 | Keine Kommentare

GRACE: melting land ice

Content: In the context of a presentation for the ESPACE program at TUM, the GRACE mission and its measurement technique, as well as its use for the geoscientific community for melting land ice oberservations is presented and discussed. For this purpose several studies have been analysed and summarized. Presentation   GRACE gravity field observations of melting land ice Outlook GRACE mission GRACE spacecraft Gravity measurement principle From measurement to model Spherical harmonics model Assumptions and properties of GRACE data Computational effort GRACE gravity models over time Gravity models and its applications Melting land ice with contributions from worldwide glaciers Melting land ice with contributions from Greenland/Antarctica Animation showing melting land ice worldwide Melting land ice in Antarctica study Melting land ice in Greenland study Future missions References used for the presentation Predicted lifetime of GRACE GRACE Level 2 data explanation Post-glacial rebound explanation Sea-Level Change explanation Methods for equivialent water height determination GRACE mass estimate explanation from...

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