Featured Research

from universities, journals, and other organizations

Changes In Jet Stream, Storm Tracks, Linked To Prairie Drought Patterns, Study Finds

Date:
March 10, 2003
Source:
Queen's University
Summary:
New findings from Queen's researchers will help experts better predict future drought patterns and water availability in the prairies.

New findings from Queen's researchers will help experts better predict future drought patterns and water availability in the prairies.

Related Articles


An international research team including biologists Kathleen Laird and Brian Cumming from the Queen's Paleoecological Environmental Assessment and Research Laboratory (PEARL), and Peter Leavitt from the University of Regina, investigated records of drought over the past 2000 years from lake sediments in the northern Canadian prairie region (Manitoba to Alberta), as well as from sites in North Dakota and Minnesota.

"Our results from the Canadian prairies show a previously unknown and abrupt shift in climatic conditions around AD 700, while in the northern U.S. prairies, the shift occurred 500 years later, at the onset of the Little Ice Age in North America," says Dr. Laird.

Although the mechanisms behind these patterns are poorly understood, the research team believes they are likely related to persistent changes in the shape and location of the jet stream and associated storm tracks.

"Similar large-scale shifts today would prove to be a major challenge for society, regardless of global warming – particularly since persistent periods of drought in the past have coincided with stress and even collapse of societies," Dr. Laird says.

The study will be published in the March issue of the Proceedings of the National Association of Sciences (PNAS). Also on the team are researchers from the University of Nebraska, and NASA's National Space Science and Technology Center in Huntsville, AL.

In a previous study led by Dr. Cumming that spanned the past 5500 years, a similar large-scale change in climate was observed in British Columbia at AD 700. Additionally, they found that similar distinct shifts in climatic conditions occurred roughly every 1200 years throughout the entire span.

"The persistence and abrupt nature of these millennial-scale events represents a scale of climate change that isn't well understood yet," says Dr. Cumming. "Consequently, these data have huge implications for future climate predictions, and particularly drought assessment, on the prairies."

The current study was supported by a strategic grant from the Natural Sciences and Engineering Research Council of Canada (NSERC).


Story Source:

The above story is based on materials provided by Queen's University. Note: Materials may be edited for content and length.


Cite This Page:

Queen's University. "Changes In Jet Stream, Storm Tracks, Linked To Prairie Drought Patterns, Study Finds." ScienceDaily. ScienceDaily, 10 March 2003. <www.sciencedaily.com/releases/2003/03/030310071025.htm>.
Queen's University. (2003, March 10). Changes In Jet Stream, Storm Tracks, Linked To Prairie Drought Patterns, Study Finds. ScienceDaily. Retrieved October 25, 2014 from www.sciencedaily.com/releases/2003/03/030310071025.htm
Queen's University. "Changes In Jet Stream, Storm Tracks, Linked To Prairie Drought Patterns, Study Finds." ScienceDaily. www.sciencedaily.com/releases/2003/03/030310071025.htm (accessed October 25, 2014).

Share This



More Earth & Climate News

Saturday, October 25, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

EU Gets Climate Deal, UK PM Gets Knock

EU Gets Climate Deal, UK PM Gets Knock

Reuters - Business Video Online (Oct. 24, 2014) EU leaders achieve a show of unity by striking a compromise deal on carbon emissions. But David Cameron's bid to push back EU budget contributions gets a slap in the face as the European Commission demands an extra 2bn euros. David Pollard reports. Video provided by Reuters
Powered by NewsLook.com
Deep Sea 'mushroom' Could Be Early Branch on Tree of Life

Deep Sea 'mushroom' Could Be Early Branch on Tree of Life

Reuters - Innovations Video Online (Oct. 24, 2014) Miniature deep sea animals discovered off the Australian coast almost three decades ago are puzzling scientists, who say the organisms have proved impossible to categorise. Academics at the Natural History of Denmark have appealed to the world scientific community for help, saying that further information on Dendrogramma enigmatica and Dendrogramma discoides could answer key evolutionary questions. Jim Drury has more. Video provided by Reuters
Powered by NewsLook.com
Raw: Tornado Rips Roofs in Washington State

Raw: Tornado Rips Roofs in Washington State

AP (Oct. 24, 2014) A rare tornado ripped roofs off buildings, uprooted trees and shattered windows Thursday afternoon in the southwest Washington city of Longview, but there were no reports of injuries. (Oct. 24) Video provided by AP
Powered by NewsLook.com
Fast-Moving Lava Headed For Town On Hawaii's Big Island

Fast-Moving Lava Headed For Town On Hawaii's Big Island

Newsy (Oct. 24, 2014) Lava from the Kilauea volcano on Hawaii's Big Island has accelerated as it travels toward a town called Pahoa. Video provided by Newsy
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:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

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