Spacebased observations of oceanic influence on the annual variation of South American water balance

Details Spacebased observations of oceanic influence on the annual variation of South American water balance Spacebased observations of oceanic influence on the annual variation of South American water balance

Apr 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3308710l&link_type=abstract

Geophysical Research Letters, Volume 33, Issue 8, CiteID L08710

Mathematics

Logic

2

Geodesy And Gravity: Global Change From Geodesy (1222, 1622, 1630, 1641, 1645, 4556), Global Change: Water Cycles (1836), Hydrology: Hydroclimatology, Atmospheric Processes: Precipitation (1854), Oceanography: General: Remote Sensing And Electromagnetic Processes (0689, 2487, 3285, 4455, 6934)

Scientific paper

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.

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