Amazon River Discharge and Climate Variability: 1903 to 1985

Reconstruction of an 83-year record (1903 to 1985) of the discharge of the Amazon River shows that there has been no statistically significant change in discharge over the period of record and that the predominant interannual variability occurs on the 2- to 3-year time scale. Oscillations of river d...

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Bibliographic Details
Published inScience (American Association for the Advancement of Science) Vol. 246; no. 4926; pp. 101 - 103
Main Authors Richey, Jeffrey E., Nobre, Carlos, Deser, Clara
Format Journal Article
LanguageEnglish
Published United States The American Association for the Advancement of Science 06.10.1989
American Association for the Advancement of Science
Subjects
Climate change
Climate models
El Nino
Freshwater
Geographic profiles
Marine
Oceans
Oscillation
Precipitation
River basins
Rivers
Southern oscillation
Water cycle
Amazon River
IS, Tropical Pacific
South America, Amazon R
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Summary:Reconstruction of an 83-year record (1903 to 1985) of the discharge of the Amazon River shows that there has been no statistically significant change in discharge over the period of record and that the predominant interannual variability occurs on the 2- to 3-year time scale. Oscillations of river discharge predate significant human influences in the Amazon basin and reflect both extrabasinal and local factors. Cross-spectrum analyses of Amazon flow anomalies with indicators of the E1 Niño-Southern Oscillation phenomenon suggest that the oscillations in the hydrograph are coupled to the tropical Pacific climate cycle.
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ISSN:0036-8075
1095-9203
DOI:10.1126/science.246.4926.101