Journal
JOURNAL OF HYDROMETEOROLOGY
Volume 10, Issue 6, Pages 1561-1568Publisher
AMER METEOROLOGICAL SOC
DOI: 10.1175/2009JHM1108.1
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- NOAA [NA07OAR4310268]
- NASA Advanced Supercomputing (NAS) Division at Ames Research Center [SMD-07-0382]
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The remote influence of the El Nino-Southern Oscillation (ENSO) strongly manifests over the equatorial Amazon (EA)-including parts of southern Venezuela, Guyana, French Guiana, and Suriname-when there is a large-scale anomalous upper-level divergence over continental tropical South America. Modeling studies conducted in this paper suggest that it is because of the modulation of the local diurnal cycle of the moisture flux convergence, which results in the local amplification of the ENSO signal over the EA. Further, it is shown that the local land surface feedback plays a relatively passive but important role of maintaining these interannual precipitation anomalies over the EA region.
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