Navigation Links
Risk of Amazon rainforest dieback is higher than IPCC projects
Date:10/21/2013

ng the wet season. The soil can only hold so much water and the rest runs off. The water stored in the soil at the end of the wet season is all that the rainforest trees have to last them through the dry season. The longer the dry season lasts, regardless of how wet the wet season was, the more stressed the trees become and the more susceptible they are to fire.

The researchers say the most likely explanation for the lengthening dry season in the southern Amazon in recent decades is human-caused greenhouse warming, which inhibits rainfall in two ways. First, it makes it harder for warm, dry air near the surface to rise and freely mix with cool, moist air above. And second, it blocks cold front incursions from outside the tropics that could trigger rainfall. The climate models used by the IPCC do a poor job representing these processes, which might explain why they project only a slightly longer Amazonian dry season, says Fu.

The Amazon rainforest normally removes the greenhouse gas carbon dioxide from the atmosphere, but during a severe drought in 2005, it released 1 petagram of carbon (about one-tenth of annual human emissions) to the atmosphere. Fu and her colleagues estimate that if dry seasons continue to lengthen at just half the rate of recent decades, the Amazon drought of 2005 could become the norm rather than the exception by the end of this century.

"Because of the potential impact on the global carbon cycle, we need to better understand the changes of the dry season over southern Amazonia," says Fu.

Some scientists have speculated that the combination of longer dry seasons, higher surface temperatures and more fragmented forests resulting from ongoing human-caused deforestation could eventually convert much of southern Amazonia from rainforest to savanna.

Earlier studies have shown that human-caused deforestation in the Amazon can alter rainfall patterns. But the researchers didn't see a strong signal of defore
'/>"/>

Contact: Marc Airhart
mairhart@jsg.utexas.edu
512-471-2241
University of Texas at Austin
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Field Museum scientists estimate 16,000 tree species in the Amazon
2. LSU research responsible for naming 15 new species of Amazonian birds
3. Garcinia Cambogia Weight Loss Supplement from Revocure is now Back in Stock on Amazon
4. Amazon River exhales virtually all carbon taken up by rain forest
5. No-win situation for agricultural expansion in the Amazon
6. Ecology, economy and management of an agro-industrial Amazon frontier
7. Researchers question evaluation methods for protected areas in the Amazon
8. From the Amazon rainforest to human body cells: Quantifying stability
9. Amazon deforestation brings loss of microbial communities
10. Deforestation in the Amazon equals net losses of diversity for microbial communities
11. Climate warming unlikely to cause near-term extinction of Amazon trees, but threats remain
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Risk of Amazon rainforest dieback is higher than IPCC projects
(Date:4/10/2015)... Research and Markets ( http://www.researchandmarkets.com/research/cjk4gb/security ) has ... - NEC" report to their offering. ... to supply a range of IT security management and ... on the development of a Big Data and cloud ... Asia-Pacific region is a core ...
(Date:4/2/2015)... At its 2015 ACMG Annual Clinical Genetics ... the American College of Medical Genetics and Genomics (ACMG) ... Board.  Members of the ACMG Board of Directors serve ... advancing its policies and programs. ACMG is the national ... an eventful time in medical genetics and genomics.  We ...
(Date:3/31/2015)... 2015  Elephant Talk Communications Corp. (NYSE MKT: ETAK) ... Software Defined Network Architecture (ET Software DNA® 2.0) platforms ... approximately $20.4 million for the year ended December 31, ... the year ended December 31, 2013. ... completed its multi-year transition away from its legacy landline ...
Breaking Biology News(10 mins):NEC Security Competitive Profile 2015 2American College of Medical Genetics and Genomics Announces New Board Members: Dr. Louanne Hudgins is ACMG President-Elect 2American College of Medical Genetics and Genomics Announces New Board Members: Dr. Louanne Hudgins is ACMG President-Elect 3American College of Medical Genetics and Genomics Announces New Board Members: Dr. Louanne Hudgins is ACMG President-Elect 4American College of Medical Genetics and Genomics Announces New Board Members: Dr. Louanne Hudgins is ACMG President-Elect 5American College of Medical Genetics and Genomics Announces New Board Members: Dr. Louanne Hudgins is ACMG President-Elect 6American College of Medical Genetics and Genomics Announces New Board Members: Dr. Louanne Hudgins is ACMG President-Elect 7American College of Medical Genetics and Genomics Announces New Board Members: Dr. Louanne Hudgins is ACMG President-Elect 8Elephant Talk Reports 2014 Fourth Quarter and Year End Financial Results 2Elephant Talk Reports 2014 Fourth Quarter and Year End Financial Results 3Elephant Talk Reports 2014 Fourth Quarter and Year End Financial Results 4Elephant Talk Reports 2014 Fourth Quarter and Year End Financial Results 5Elephant Talk Reports 2014 Fourth Quarter and Year End Financial Results 6
... are reporting that a technique used in the search for ... discover new, environmentally friendly materials for fighting global warming. Such ... dioxide from industrial smokestacks and other fixed sources before it ... journal Energy & Fuels . Michael Drummond and ...
... an advance with overtones of Star Trek phasers and other ... an internal on-off "switch" that paralyzes animals when exposed to ... when the light is turned off. When exposed to ordinary ... appears in the Journal of the American Chemical Society ...
... of Pennsylvania studying oocytes in mice, the immature egg ... behavior in microRNA, or miRNA, activity that may be ... pluripotent blastomeres of the embryo. MicroRNAs are a member ... matter of the biological world. MicroRNAs imperfectly pair ...
Cached Biology News:Penn biologists determine microRNA activity is suppressed in mouse ovum 2
(Date:5/4/2015)... NEW YORK , May 4, 2015 /PRNewswire-USNewswire/ ... system for granted. But for certain infants with ... and death are stark consequences of their impaired ... Langone Medical Center have identified an important role ... infection resulting from Mycobacterium tuberculosis, the bacterium causing ...
(Date:5/4/2015)... JSS Medical Research Inc., a Montreal based ... of Max Neeman International (MNI), with head office in ... Ahmedabad, Bangalore , Chennai ... regional office is located North Carolina, USA . ... equity investment transaction into JSS with Capital Croissance PME (CCPME), a ...
(Date:5/4/2015)... BOSTON , May 4, 2015 ... development of novel therapies for neurological and neuropsychiatric ... has initiated dosing of Alzheimer,s patients in a ... candidate, GC021109, a compound developed as a potential ... disease is innovative in that it both promotes ...
(Date:5/4/2015)... 4, 2015  Traverse Biosciences announced today that ... development agreement (CRADA) with Aratana Therapeutics Inc. (NASDAQ: ... TRB-N0224 for the treatment and control of periodontal ... Traverse Biosciences has also granted Aratana an exclusive ... control of periodontal disease in companion animals, inclusive ...
Breaking Biology Technology:Researchers Discover A Novel And Unexpected Role For Calcium In Controlling Inflammation During Chronic Lung Infection 2Researchers Discover A Novel And Unexpected Role For Calcium In Controlling Inflammation During Chronic Lung Infection 3JSS Medical Canada widens its global presence across Asia/Pacific region 2JSS Medical Canada widens its global presence across Asia/Pacific region 3JSS Medical Canada widens its global presence across Asia/Pacific region 4GliaCure Initiates Phase 1b Dosing in Alzheimer's Patients 2Traverse Biosciences Executes Agreement with Aratana Therapeutics to Advance Development of TRB-N0224 for the Treatment and Control of Periodontal Disease in Pets 2Traverse Biosciences Executes Agreement with Aratana Therapeutics to Advance Development of TRB-N0224 for the Treatment and Control of Periodontal Disease in Pets 3Traverse Biosciences Executes Agreement with Aratana Therapeutics to Advance Development of TRB-N0224 for the Treatment and Control of Periodontal Disease in Pets 4
... Jan. 28 Bion Environmental Technologies, ... on Monday, January 26, 2009, the Pennsylvania Infrastructure ... to Bion PA 1, LLC (a wholly-owned subsidiary ... the loan will be used to construct Bion,s ...
... quarter EPS of $0.44 -- increase of 110% from prior year ... Corporation (Nasdaq: KNSY ), a leading medical technology company ... medical procedures, today reported the results for its second quarter and ... , Record ...
... , - Guests Will Bounce ... Staying healthy in these stressful times ... Health Retreats early in 2009 may provide,participants with the impetus ... A key component of the retreat will ...
Cached Biology Technology:Bion Announces PENNVEST Board Approves $7.8 Million Financing for Kreider Farms Dairy Project 2Bion Announces PENNVEST Board Approves $7.8 Million Financing for Kreider Farms Dairy Project 3Bion Announces PENNVEST Board Approves $7.8 Million Financing for Kreider Farms Dairy Project 4Kensey Nash Reports Strong Second Quarter and First Six Month Fiscal Year 2009 Results 2Kensey Nash Reports Strong Second Quarter and First Six Month Fiscal Year 2009 Results 3Kensey Nash Reports Strong Second Quarter and First Six Month Fiscal Year 2009 Results 4Kensey Nash Reports Strong Second Quarter and First Six Month Fiscal Year 2009 Results 5Kensey Nash Reports Strong Second Quarter and First Six Month Fiscal Year 2009 Results 6Kensey Nash Reports Strong Second Quarter and First Six Month Fiscal Year 2009 Results 7Kensey Nash Reports Strong Second Quarter and First Six Month Fiscal Year 2009 Results 8Kensey Nash Reports Strong Second Quarter and First Six Month Fiscal Year 2009 Results 9Kensey Nash Reports Strong Second Quarter and First Six Month Fiscal Year 2009 Results 10Kensey Nash Reports Strong Second Quarter and First Six Month Fiscal Year 2009 Results 11Kensey Nash Reports Strong Second Quarter and First Six Month Fiscal Year 2009 Results 12Kensey Nash Reports Strong Second Quarter and First Six Month Fiscal Year 2009 Results 13Kensey Nash Reports Strong Second Quarter and First Six Month Fiscal Year 2009 Results 14Kensey Nash Reports Strong Second Quarter and First Six Month Fiscal Year 2009 Results 15Kensey Nash Reports Strong Second Quarter and First Six Month Fiscal Year 2009 Results 16Kensey Nash Reports Strong Second Quarter and First Six Month Fiscal Year 2009 Results 17Kensey Nash Reports Strong Second Quarter and First Six Month Fiscal Year 2009 Results 18New Health Retreat Gives a Fresh Attitude Towards Disease Prevention 2
... Source: Crotalus adamanteus venom Description: ... widely used in studying nucleic ... . It hydrolyzes 5'-mononucleotides from ... . Phosphodiesterase I cleaves ADP-ribosylated ...
Economical and manually filled LN2 vacuum insulated storage container offers high capacity and low nitrogen consumption while offering convenient storage of samples....
... digitonin and digoxin. Physical form: Lyophilized powder containing ... 0.06% NaCl Preparation Note: Sodium iodide extracted fraction ... 19, 755 (1965). Unit Definition: One unit ... ATP per min at pH 7.4 at 37 ...
... introduced the highly potent TURBO DNase (patent pending) ... was set in DNA removal capabilities. TURBO DNase ... that is much more efficient than wild type ... unwanted DNA. TURBO DNase binds DNA substrates 6-fold ...
Biology Products: