Featured Research

from universities, journals, and other organizations

Northern South America rainier during Little Ice Age

Date:
January 1, 2010
Source:
American Geophysical Union
Summary:
During the Little Ice Age (LIA; covering approximately the fifteenth through the eighteenth centuries), northern South America experienced about 10 percent more rainfall than during the twentieth century, according to researchers.

During the Little Ice Age (LIA; covering approximately the fifteenth through the eighteenth centuries), northern South America experienced about 10 percent more rainfall than during the twentieth century, according to Reuter et al.

The authors analyzed two new records of oxygen isotopes (which track precipitation levels) from cave formations in northeastern Peru. They attribute the higher rainfall in northern South America during the LIA to cooler spring sea surface temperatures in the tropical North Atlantic.

Furthermore, the authors note that some studies have shown that during the twentieth century, a significant amount of rainfall variability in northern South America was related to the El Niño-Southern Oscillation (ENSO), with higher rainfall occurring during La Niña conditions.

However, the authors determine that the ENSO was probably not as significant an influence on rainfall during that time period as it is now.

The authors suggest that the results point to a need to reevaluate some ideas about hydroclimate change over South America during the past millennia.

The research is published in Geophysical Research Letters. Authors: Justin Reuter, Lowell Stott, and Deborah Khider: Department of Earth Sciences, University of Southern California, Los Angeles, California, USA; Ashish Sinha: Department of Earth Sciences, California State University, Carson, California, USA; and Hai Cheng and R. Lawrence Edwards: Department of Geology and Geophysics, University of Minnesota, Minneapolis, Minnesota, USA.


Story Source:

The above story is based on materials provided by American Geophysical Union. Note: Materials may be edited for content and length.


Journal Reference:

  1. Reuter et al. A new perspective on the hydroclimate variability in northern South America during the Little Ice Age. Geophysical Research Letters, 2009; 36 (21): L21706 DOI: 10.1029/2009GL041051

Cite This Page:

American Geophysical Union. "Northern South America rainier during Little Ice Age." ScienceDaily. ScienceDaily, 1 January 2010. <www.sciencedaily.com/releases/2009/12/091230183843.htm>.
American Geophysical Union. (2010, January 1). Northern South America rainier during Little Ice Age. ScienceDaily. Retrieved July 30, 2014 from www.sciencedaily.com/releases/2009/12/091230183843.htm
American Geophysical Union. "Northern South America rainier during Little Ice Age." ScienceDaily. www.sciencedaily.com/releases/2009/12/091230183843.htm (accessed July 30, 2014).

Share This




More Earth & Climate News

Wednesday, July 30, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Climate Change Could Cost Billions, According To White House

Climate Change Could Cost Billions, According To White House

Newsy (July 29, 2014) — A report from the White House warns not curbing greenhouse gas emissions could cost the U.S. billions. Video provided by Newsy
Powered by NewsLook.com
Climate Change Could Cost Billions According To White House

Climate Change Could Cost Billions According To White House

Newsy (July 29, 2014) — A report from the White House warns not curbing greenhouse gas emissions could cost the U.S. billions. Video provided by Newsy
Powered by NewsLook.com
Jane Goodall Warns Great Apes Face Extinction

Jane Goodall Warns Great Apes Face Extinction

AFP (July 29, 2014) — The world's great apes face extinction within decades, renowned chimpanzee expert Jane Goodall warned Tuesday in a call to arms to ensure man's closest relatives are not wiped out. Duration: 00:58 Video provided by AFP
Powered by NewsLook.com
Rat Infestation at Paris' Tuileries Garden

Rat Infestation at Paris' Tuileries Garden

AFP (July 29, 2014) — An infestation of rats is causing concern among tourists at Paris' most famous park -- the Tuileries garden next to the Louvre Museum. Duration: 00:54 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins