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Evidence of past Southern hemisphere rainfall cycles related to Antarctic temperatures
Date:1/17/2012

les (3,800 meters) above sea level in the Peruvian Andes for this study. The sample grew from 49,500 to 16,000 years ago, providing a 34,000-year-long record of rainfall changes in the Amazon Basin. Kanner and colleagues found that cold periods in the high Northern latitudes are associated with an increase in precipitation, the South American Summer Monsoon, in the Amazon Basin.

They found that cold periods in the Northern Hemisphere are associated with an increase in precipitation, the South American Summer Monsoon, in the Amazon Basin.

"This relationship is the exact opposite of changes in rainfall in the Northern Hemisphere tropics, where cold intervals result in a decrease in rainfall," Burns says.

Revised chronology for several major climate events that took place in the last glacial period proposed in this study could lead to a better understanding of Antarctic warming during the same period and its relationship to warming the subtropical North Atlantic, the authors state.


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Contact: Janet Lathrop
jlathrop@admin.umass.edu
413-545-0444
University of Massachusetts at Amherst
Source:Eurekalert  

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Evidence of past Southern hemisphere rainfall cycles related to Antarctic temperatures
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