Seasonal cycle and interannual variability in the Amazon hydrologic cycle

  title={Seasonal cycle and interannual variability in the Amazon hydrologic cycle},
  author={Ning Zeng},
  journal={Journal of Geophysical Research},
  • N. Zeng
  • Published 27 April 1999
  • Environmental Science
  • Journal of Geophysical Research
An analysis of the Amazon basin hydrologic cycle has been carried out using the NASA/Goddard Earth Observing System (GEOS-1) atmospheric reanalysis, observed rainfall of Xie and Arkin (1996), and historical Amazon River discharge. Over a seasonal cycle the precipitation is found to vary by 5 mm d 21 , and the runoff is found to vary by 2 mm d 21 , while the evaporation largely remains constant. On interannual timescales the hydrologic variability both in the atmosphere and at the land surface… 

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