HOME >> BIOLOGY >> NEWS
Changes in jet stream, storm tracks, linked to prairie drought patterns, study finds

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

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
'"/>

Contact: Nancy Dorrance
dorrance@post.queensu.ca
613-533-2869
Queen's University
7-Mar-2003


Page: 1 2

Related biology news :

1. Changes to insect-seeking calls of horseshoe bats may drive new species formation
2. Changes in shape of single protein plays key role in the spread of cancer cells
3. Changes in arctic ice affect life around the globe
4. Changes in prevalence of mutations associated with HIV treatment failure
5. Changes in rainfall patterns spur plant growth, carbon absorption across U.S.
6. Changes in agricultural practices help clean up Lake Erie
7. Changes in Lake Erie fish population suggest lakes recovery
8. Changes in Australian ecosystems tied to arrival of exotic animals
9. Changes in North American land use have had major impact on global environment
10. Changes in diet related to prevalence of asthma and allergies
11. Changes for chickens? New hybrid corn helps reduce phosphorus in poultry litter, UD scientists report

Post Your Comments:
(Date:4/15/2014)... Biologists at UC San Diego have succeeded in ... hormone responsible for growth and resistance to drought. ... studies to determine how the hormone helps plants ... by the continuing increase in the atmosphere,s carbon ... achievement appears in the April 15 issue of ...
(Date:4/15/2014)... Looking at the question of how social behavior has ... universities in Mainz and Basel have gained new insights ... simply compete for food. Rather the siblings share what ... absent," explained Dr. Jol Meunier of the Evolutionary Biology ... University of Mainz (JGU). The team of biologists from ...
(Date:4/15/2014)... (April 15, 2014) The American Association of Anatomists ... All awards will be presented during the Closing ... Hotel on Tuesday, April 29th at 7:30 p.m. during ... , The 2014 award winners are: , ... PhD, of the Icahn School of Medicine at Mount ...
Breaking Biology News(10 mins):Biologists develop nanosensors to visualize movements and distribution of plant hormone 2Sibling cooperation in earwig families gives clues to early evolution of social behavior 2American Association of Anatomists 2014 award winners 2
(Date:1/15/2014)... January 15, 2014 This webinar ... on nonclinical and clinical safety assessment in biosimilars. ... guide a path for biosimilar drug development, however ... of biosimilarity with regards to quality, safety and ... of biosimilar drug development and registration, development strategies ...
(Date:1/15/2014)... NC (PRWEB) January 15, 2014 ... an enhancement to its Online Web Portal for Life ... now have the ability to specify the subject matter ... nearly 50 life science sub-domains. This will help reduce ... and scientific fields, and decrease the likelihood of error. ...
(Date:1/14/2014)... Doylestown, PA (PRWEB) January 14, 2014 ... – 11 p.m. , Location: Warrington Country Club, 1360 ... Hepatitis B Foundation, the only national nonprofit organization solely ... improving the quality of life for those affected worldwide, ... 11 at Warrington Country Club in Warrington, Pa. ...
(Date:1/14/2014)... York, NY (PRWEB) January 14, 2014 ... initiated coverage of Alliqua, Inc. (OTCQB: ALQA). Alliqua ... and marketing proprietary products to serve the wound ... , In late 2012, Alliqua was restructured ... launched the company’s new strategy to become a ...
Breaking Biology Technology:Xtalks Life Sciences Webinar Examines Safety Assessment of Biosimilars 2DTS Improves Efficiency for Life Science Document Translations 2Hepatitis B Foundation to Host Annual Crystal Ball Gala 2EquitiesIQ Initiates Coverage of Alliqua, Inc. 2EquitiesIQ Initiates Coverage of Alliqua, Inc. 3
Cached News: