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GRACE Measurements of Mass Variability in the Earth System

Tapley, Byron D. and Bettadpur, Srinivas and Ries, John C. and Thompson, Paul F. and Watkins, Michael M. (2004) GRACE Measurements of Mass Variability in the Earth System. Science, 305 (5683). pp. 503-505. ISSN 0036-8075. http://resolver.caltech.edu/CaltechAUTHORS:20141121-105248542

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Abstract

Monthly gravity field estimates made by the twin Gravity Recovery and Climate Experiment (GRACE) satellites have a geoid height accuracy of 2 to 3 millimeters at a spatial resolution as small as 400 kilometers. The annual cycle in the geoid variations, up to 10 millimeters in some regions, peaked predominantly in the spring and fall seasons. Geoid variations observed over South America that can be largely attributed to surface water and groundwater changes show a clear separation between the large Amazon watershed and the smaller watersheds to the north. Such observations will help hydrologists to connect processes at traditional length scales (tens of kilometers or less) to those at regional and global scales.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1126/science.1099192DOIArticle
http://www.sciencemag.org/content/305/5683/503PublisherArticle
http://www.sciencemag.org/content/305/5683/503/suppl/DC1PublisherSupporting Online Material
Additional Information:© 2004 American Association for the Advancement of Science. Received 15 April2004; accepted 18 June 2004. We thank M. Rodellfor providing terrestrial water storage output from the GLDAS model, T. Pekker and J. Chen for conversion of the GLDAS output into geopotential coefficients, and W. Bertiger, F. Flechtner, B. Gunter, Z. Kang, G. Kruizinga, P. Nagel, R. Pastor, S. Poole, L. Romans, H.-J. Rim, S.-C. Wu, S. Yoon, and D.-N. Yuan for their vital contributions to the software development, algorithm testing, and data processing required to accomplish these results. Supported by NASA contract NAS5-97213.
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NASANAS5-97213
Record Number:CaltechAUTHORS:20141121-105248542
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20141121-105248542
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:52043
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:21 Nov 2014 20:44
Last Modified:13 Sep 2016 23:51

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