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:
*Name:
*Comment:
*Email:


(Date:3/30/2017)... 2017 The research team of The Hong ... fingerprint identification by adopting ground breaking 3D fingerprint minutiae recovery and ... speed and accuracy for use in identification, crime investigation, immigration control, ... ... A research team led ...
(Date:3/29/2017)... the health IT company that operates the largest health ... today announced a Series B investment from BlueCross BlueShield ... investment and acquisition accelerates higi,s strategy to create the ... activities through the collection and workflow integration of ambient ... secures data today on behalf of over 36 million ...
(Date:3/27/2017)... CENTRE, N.Y. , March 27, 2017 /PRNewswire-USNewswire/ ... Healthcare Information and Management Systems Society (HIMSS) Analytics ... Outpatient EMR Adoption Model sm . In addition, ... 12% of U.S. hospitals using an electronic medical ... CHS for its high level of EMR usage ...
Breaking Biology News(10 mins):
(Date:10/11/2017)... , Oct. 11, 2017  VMS BioMarketing, a leading provider ... nationwide oncology Clinical Nurse Educator (CNE) network, which will launch ... for communication among health care professionals to enhance the patient ... office staff, and other health care professionals to help women ... cancer. ...
(Date:10/11/2017)... ... October 11, 2017 , ... Singh Biotechnology today ... designation to SBT-100, its novel anti-STAT3 (Signal Transducer and Activator of Transcription 3) ... able to cross the cell membrane and bind intracellular STAT3 and inhibit its ...
(Date:10/10/2017)... ... October 10, 2017 , ... Dr. Bob Harman, founder ... local San Diego Rotary Club. The event entitled “Stem Cells and ... had 300+ attendees. Dr. Harman, DVM, MPVM was joined by two human doctors: ...
(Date:10/10/2017)... ... October 10, 2017 , ... ... 13 prestigious awards honoring scientists who have made outstanding contributions ... scheduled symposium during Pittcon 2018, the world’s leading conference and exposition for laboratory ...
Breaking Biology Technology:
Cached News: