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Title: Spacebased observations of oceanic influence on the annual variation of South American water balance
Authors: Liu, W. Timothy
Xie, Xiaosu
Tang, Wenqing
Zlotnicki, Victor
Keywords: water cycle
rainfall annual cycle
remote sensing
ocean moisture influx
Andes mountains
Issue Date: 27-Apr-2006
Publisher: American Geophysical Union
Citation: Geophysical Research Letter, Vol 33, L08710. doi: 10.1029/2006GL25683, 2006
Abstract: The mass change of South America (SA) continent measured by the Gravity Recovery and Climate Experiment (GRACE) imposes a constraint on the uncertainties in estimating the annual variation of rainfall measured by Tropical Rain Measuring Mission (TRMM) and ocean moisture influx derived from QuikSCAT data. The approximate balance of the mass change rate with the moisture influx less climatological river discharge, in agreement with the conservation principle, bolsters not only the credibility of the spacebased measurements, but supports the characterization of ocean’s influence on the annual variation of continental water balance. The annual variation of rainfall is found to be in phase with the mass change rate in the Amazon and the La Plata basins, and the moisture advection across relevant segments of the Pacific and Atlantic coasts agrees with the annual cycle of rainfall in the two basins and the Andes mountains.
Appears in Collections:JPL TRS 1992+

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