Countries considered in this section include: Brazil, east Bolivia, Paraguay, and north Argentina. La Niña-like conditions were present in early 2009, followed by the development of El Niño patterns starting in June 2009. During June September, sea surface temperatures were generally about 1°C warmer than the long-term average across the central and eastern equatorial Pacific. Considering the summertime mean of the 200009 decade for the tropical region east of the Andes, this decade showed less rainfall (about 200 mm below normal) as compared to 198090 (about 350 mm above than normal), while air temperatures were 0.5°C to 2°C warmer.
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