Lengthy Droughts Tied to Long-Lived la Ninas. (Long, Dry Spells)
Perkins, S., Science News
A new study of persistent droughts that occurred in the United States during the past 3 centuries suggests that those dry spells may be associated with prolonged instances of the climate phenomenon known as La Nina. That occurs when sea-surface temperatures in the central Pacific are cooler than average.
La Nina events typically bring drier-than-normal conditions to the southwestern United States, says Edward R. Cook of the Lamont-Doherty Earth Observatory in Palisades, N.Y. In the 20th century, each La Nina typically didn't last more than 2 years. However, new analyses of coral taken from the central Pacific indicate that the sea-surface temperatures there were …
Questia, a part of Gale, Cengage Learning. www.questia.com
Publication information: Article title: Lengthy Droughts Tied to Long-Lived la Ninas. (Long, Dry Spells). Contributors: Perkins, S. - Author. Magazine title: Science News. Volume: 162. Issue: 6 Publication date: August 10, 2002. Page number: 85+. © 2009 Science Service, Inc. COPYRIGHT 2002 Gale Group.
This material is protected by copyright and, with the exception of fair use, may not be further copied, distributed or transmitted in any form or by any means.