HOME >> BIOLOGY >> NEWS
Research reveals use of tree rings and ocean temperature shifts in anticipating megadroughts

Not long ago, conventional wisdom was that you couldn't predict the climate for more than a few days in advance. Then came the awareness of El Nio and La Nia and the forecast window increased to as much as 6 to 9 months, depending on the region and season. But a forthcoming study in the Geophysical Research Letters suggests that opposing shifts in Tropical Pacific and North Atlantic Ocean temperatures may foretell persistence of disastrous, multiyear droughts across the North American continent.

Forecasts longer than the 6 to 9 months typical today, if possible, would rely on two principles: the well-defined relationship between temperatures in the upper one meter of the ocean, so-called sea surface temperatures, and precipitation on land. The second principle is the ocean's thermal inertia. Once an ocean basin begins to cool or warm anomalously, it generally tends to stay that way for several years and even decades. If these slow shifts in ocean regime can be identified in their early stages, then perhaps they can used to assess the probability of disastrous, multiyear droughts across the North American continent and elsewhere.

In this light, the study published today evaluates multidecadal, precipitation variability across a network of 750-year-long tree-ring chronologies from the central and southern Rockies. The study suggests that the Great Plains, the Rockies, and the Southwest are stricken by the same 'megadrought' when for multiple years the tropical Pacific turns cold at the same time that the North Atlantic warms. The geographic scale of such megadroughts is determined by the failure of winter (November-March), early summer (May-June) and mid- to late summer (July-September) precipitation, each of which has specific links to tropical Pacific and North Atlantic sea surface temperatures.

A team of researchers from the U.S. Geological Survey, University of Wyoming and Middlebury College (Vermont) analyzed precipitation changes occurri
'"/>

Contact: Julio Betancourt
jlbetanc@usgs.gov
520-670-6821
United States Geological Survey
14-Feb-2003


Page: 1 2 3

Related biology news :

1. Researchers determine genetic cause of Timothy syndrome
2. Researchers find color sensitive atomic switch in bacteria
3. Schepens Eye Research Institute receives Roadmap grant to develop center for curing eye diseases
4. Researchers identify protein promoting vascular tumor growth
5. Researchers devise potent new tools to curb ivory poaching
6. Researchers create nanotubes that change colors, form nanocarpet and kill bacteria
7. Researchers ID chlorophyll-regulating gene
8. Environmental issues center of Inland Northwest Research Alliance 4th Annual Symposium
9. Research suggests new avenue for stopping, preventing colon cancer
10. Researchers develop fast track way to discover how cells are regulated
11. Research on carbohydrate metabolism receives historical recognition

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:4/3/2017)... , April 3, 2017  Data captured ... engineering platform, detected a statistically significant association ... prior to treatment and objective response of ... potential to predict whether cancer patients will ... treatment, as well as to improve both pre-infusion ...
(Date:3/30/2017)... -- The research team of The Hong Kong Polytechnic ... by adopting ground breaking 3D fingerprint minutiae recovery and matching technology, ... accuracy for use in identification, crime investigation, immigration control, security of ... ... A research team led by Dr ...
(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 ...
Breaking Biology News(10 mins):
(Date:10/10/2017)... ... October 10, 2017 , ... ... pharmaceutical company advancing targeted antibody-drug conjugate (ADC) therapeutics, today confirmed licensing rights ... (Hybrid Polymerized Liposomal Nanoparticle), a technology developed in collaboration with Children’s Hospital ...
(Date:10/10/2017)... CRUZ, Calif. , Oct. 10, 2017 ... grant from the NIH to develop RealSeq®-SC (Single Cell), ... kit for profiling small RNAs (including microRNAs) from single ... Analysis Program highlights the need to accelerate development of ... "New techniques for measuring ...
(Date:10/9/2017)... (PRWEB) , ... October 09, 2017 , ... The award-winning ... to broadcast first quarter 2018. American Farmer airs Tuesdays at 8:30aET on RFD-TV. ... is faced with the challenge of how to continue to feed a growing nation. ...
(Date:10/7/2017)... ... October 06, 2017 , ... ... advanced instruments and applications consulting for microscopy and surface analysis, Nanoscience Instruments ... consulting, Nanoscience Analytical offers a broad range of contract analysis services for ...
Breaking Biology Technology:
Cached News: