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:12/2/2016)... Dec. 1, 2016   SoftServe , a ... BioLock , an electrocardiogram (ECG) biosensor analysis system ... key IoT asset. The smart system ensures device-to-device ... steering wheel and mobile devices to easily ,recognize, ... As vehicle technology advances, so too must ...
(Date:11/29/2016)... , Nov. 29, 2016   ... identification and object recognition technologies, today released ... for fingerprint recognition solutions that run on ... fingerprint template using less than 128KB of ... compact devices that have limited on-board resources, ...
(Date:11/22/2016)... 22, 2016 According to the new market research ... Face, Vein, Signature, Voice), Multi-Factor), Component (Hardware and Software), Function (Contact and ... the market is expected to grow from USD 10.74 Billion in 2015 ... between 2016 and 2022. Continue Reading ... ...
Breaking Biology News(10 mins):
(Date:12/9/2016)... 2016 The research report by ... in the  Global Label-Free Array Systems Market  accounted for ... 2015. Players such as Biacore, Agilent Technologies, ForteBio, Molecular ... the global market due to their unmatched product portfolio ... upgrades and timely product launches are expected to be ...
(Date:12/8/2016)... -- The Board of Directors of the Pittsburgh Life ... only pure life sciences investment firm, today announced ... plan developed by the Nominating and Governance Committee over ... F. Jordan is selected to serve as President ... , who is elected to the position of Executive ...
(Date:12/8/2016)... , December 8, 2016 AskLinkerReports.com ... comprehensive analysis, titled Global Amyloglucosidase Industry 2016 Market Research Report. ... application, and industry chain overview are all covered in the ... analysis, and investment return analysis of the Amyloglucosidase industry. ... , , ...
(Date:12/8/2016)... Oregon (PRWEB) , ... December 08, 2016 , ... ... and the FrontPanel SDK that provide essential device-to-computer interconnect using USB or PCI ... not require FrontPanel support. The FOMD-ACV-A4 is a small, thin, SODIMM-style module that ...
Breaking Biology Technology:
Cached News: