Water level fluctuations in the Plata Basin (South America) from Topex/Poseidon Satellite Altimetry

Details Water level fluctuations in the Plata Basin (South America) from Topex/Poseidon Satellite Altimetry Water level fluctuations in the Plata Basin (South America) from Topex/Poseidon Satellite Altimetry

Feb 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30c..43m&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 3, pp. 43-1, CiteID 1143, DOI 10.1029/2002GL016033

Physics

10

Hydrology: Hydroclimatology, Hydrology: Runoff And Streamflow, Hydrology: Wetlands, Global Change: Remote Sensing, Global Change: Water Cycles (1836)

Scientific paper

Time series of water level in major rivers of the Plata basin are examined using altimetry data from the Topex/Poseidon satellite over the period 1993-2001. Ten sites are selected on the Paraná, three on the Paraguay, one the Uruguay and seven on wetlands. It is confirmed that the seasonal cycle of river levels decreases in amplitude with increasing latitude of the site. The normalized time series for sites along the same river differ mainly by a time-lag corresponding to propagation speeds of about 0.1 ms-1. The interannual variability of the Lower Paraná, with a strong peak in early 1998 and minima in early 1996 and 2000, shows the remote effects of El Niño/Southern Oscillation (ENSO). The variability of the Upper Paraná and Paraguay shows similar ENSO impacts with smaller amplitudes after 1995, and the effects of regional features climate variability before that date (e.g. the South American monsoon). The results support the usefulness of satellite altimetry for a dense and continuous monitoring of river water levels.

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