Atlantic modulation of El Niño influence on summertime rainfall over southeastern South America

Details Atlantic modulation of El Niño influence on summertime rainfall over southeastern South America Atlantic modulation of El Niño influence on summertime rainfall over southeastern South America

Aug 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3516704b&link_type=abstract

Geophysical Research Letters, Volume 35, Issue 16, CiteID L16704

Physics

3

Global Change: Climate Variability (1635, 3305, 3309, 4215, 4513), Atmospheric Processes: Ocean/Atmosphere Interactions (0312, 4504), Oceanography: General: Climate And Interannual Variability (1616, 1635, 3305, 3309, 4513)

Scientific paper

This study addresses the effect of Atlantic sea surface temperature (SST) anomalies on rainfall over southeastern South America during January-February, particularly during El Niño years, using observations as well as model simulations. It is found that the state of the equatorial Atlantic during El Niño years can modulate its influence on rainfall over southeastern South America, such that when the equatorial Atlantic is warm, the El Niño influence is weaker. This Atlantic influence is shown to occur through the response of the low level winds to equatorial SST anomalies: the convergence of westerly anomalies onto the warm anomaly decreases the equatorial trades and moisture flow into the Amazon and, moreover, reduces the northerly flow that brings moisture to southeastern South America. The total rainfall response in this region can thus be thought as the combination of rainfall anomalies from the equatorial Pacific and Atlantic oceans.

Affiliated with

Also associated with

No associations

Rating

Atlantic modulation of El Niño influence on summertime rainfall over southeastern South America does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Atlantic modulation of El Niño influence on summertime rainfall over southeastern South America, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Atlantic modulation of El Niño influence on summertime rainfall over southeastern South America will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1860882