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

A new study suggests the southern portion of the Amazon rainforest is at a much higher risk of dieback due to stronger seasonal drying than projections made by the climate models used in the latest report by the Intergovernmental Panel on Climate Change (IPCC). If severe enough, the loss of rainforest could cause the release of large volumes of the greenhouse gas carbon dioxide into the atmosphere. It could also disrupt plant and animal communities in one of the regions of highest biodiversity in the world.

Using ground-based rainfall measurements from the past three decades, a research team led by Rong Fu, professor at The University of Texas at Austin's Jackson School of Geosciences, found that since 1979, the dry season in southern Amazonia has lasted about a week longer per decade. At the same time, the annual fire season has become longer. The researchers say the most likely explanation for the lengthening dry season is global warming.

"The dry season over the southern Amazon is already marginal for maintaining rainforest," says Fu. "At some point, if it becomes too long, the rainforest will reach a tipping point."

The new results are in stark contrast to forecasts made by climate models used by the IPCC. Even under future scenarios in which atmospheric greenhouse gases rise dramatically, the models project the dry season in the southern Amazon to be only a few to 10 days longer by the end of the century, and therefore the risk of climate change-induced rainforest dieback should be relatively low.

The report appears this week in the journal Proceedings of the National Academy of Sciences.

"The length of the dry season in the southern Amazon is the most important climate condition controlling the rainforest," says Fu. "If the dry season is too long, the rainforest will not survive."

To see why the length of the dry season is such a limiting factor, imagine there is heavier than usual rainfall duri
'/>"/>

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:12/15/2014)... , Dec. 12, 2014 Research and Markets ... addition of the "Global Facial Recognition Market ... http://photos.prnewswire.com/prnh/20130307/600769 Facial ... of individuals. Facial recognition system measures the overall ... jaw edges, mouth, and the distance between eyes. ...
(Date:12/11/2014)... SALEM, N.C. , Dec. 10, 2014  That blood ... for quite a while. Hypertension – the medical term for ... in the early 1800s, and the inflatable cuff that,s used ... That doesn,t, however, mean there,s nothing new about hypertension, its ... some long-held beliefs about the condition and the best ways ...
(Date:12/10/2014)... 9, 2014  Valencell, a leader in performance biometric ... staggering demand from its licensees for highly accurate, clinically ... not solely coming from fitness and health sectors, but ... "A wearable is only as useful as the biometric ... ultimate driver in long-term mass consumer adoption of wearable ...
Breaking Biology News(10 mins):Global Facial Recognition Market 2015-2019: Key Vendors are 3M Cogent, Cognitec Systems, NEC and Safran Group 2Global Facial Recognition Market 2015-2019: Key Vendors are 3M Cogent, Cognitec Systems, NEC and Safran Group 3Research points to need for new approaches to treatment of high blood pressure 2Research points to need for new approaches to treatment of high blood pressure 3Research points to need for new approaches to treatment of high blood pressure 4Wearable Technology Products Demand Highly Accurate Biometric Technology 2
... egg question. Where do the infectious protein particles called ... cause neurodegenerative disorders, such as mad cow/Creutzfeld-Jakob disease, in ... of their properly folded protein counterparts, but they usually ... Biochemists at Emory University School of Medicine have identified ...
... Institute of Molecular and Cell Biology (IMCB) has discovered ... deadly plant toxin Ricin, widely feared for its bioterrorism ... for the tens of thousands of hospital-acquired infections in ... this first ever genome-wide study to understand how the ...
... sometimes have its advantages. That,s according to a study of ... native Chilean forest. The data show that the pollinators those ... of resources found in agricultural lands. As a result, trees ... successfully when separated by resource-poor pine plantations than by those ...
Cached Biology News:Cellular stress can induce yeast to promote prion formation 2A*Star scientists discover how to combat hospital-acquired infections and life-threatening toxins 2A*Star scientists discover how to combat hospital-acquired infections and life-threatening toxins 3As agricultural riches waylay pollinators, an endangered tree suffers 2As agricultural riches waylay pollinators, an endangered tree suffers 3
(Date:12/17/2014)... 17, 2014 Audacity, a leading California-based ... member of the Huntsworth Health Group, is proud to ... team. In her role, Gonzales will serve as Senior ... incredibly honored to welcome a talent of Jamie’s caliber ... Gaëtan Fraikin. “She is a proven healthcare innovation leader ...
(Date:12/17/2014)... 2014  United Therapeutics Corporation (NASDAQ: UTHR ... as changes to Martine Rothblatt , Ph.D,s compensation ... United Therapeutics announced the promotion of Roger ... and David Zaccardelli , Pharm.D. to Executive Vice ... promotions, Dr. Rothblatt,s title will change from Chairman and ...
(Date:12/17/2014)... 17, 2014 Tigercat Pharma, Inc. today ... evaluating the investigational oral NK-1 receptor antagonist VPD-737 ... chronic itch who are unresponsive or inadequately responsive ... steroids and antihistamines. The primary ... Scale (VAS) itch score from baseline, comparing drug ...
(Date:12/15/2014)... (PRWEB) December 15, 2014 METTLER ... inline PVM tool, ParticleView V19 with PVM ... situ probe-based particle vision and measurement tool continuously ... process conditions. ParticleView V19 then automatically prepares a ... tracking particle size and concentration changes. This compelling ...
Breaking Biology Technology:Audacity Welcomes Healthcare Communications Expert Jamie Gonzales as Senior Vice President of Client Services 2United Therapeutics Corporation Announces Executive Promotions and CEO Compensation Change 2United Therapeutics Corporation Announces Executive Promotions and CEO Compensation Change 3United Therapeutics Corporation Announces Executive Promotions and CEO Compensation Change 4Velocity Pharmaceutical Development, LLC and Tigercat Pharma, Inc. Announce Phase 2 Results for VPD-737 in Patients With Chronic Pruritus 2Velocity Pharmaceutical Development, LLC and Tigercat Pharma, Inc. Announce Phase 2 Results for VPD-737 in Patients With Chronic Pruritus 3Velocity Pharmaceutical Development, LLC and Tigercat Pharma, Inc. Announce Phase 2 Results for VPD-737 in Patients With Chronic Pruritus 4New Real-Time In Situ Probe-Based Video Microscope from METTLER TOLEDO 2
... will seek additional venture funding this year in ... president and CEO Loren G. Peterson said. , ,Peterson ... the Innovation Monday program. He said ZyStor, which is ... filing the application for its lead product in early ...
... Wis. - For the second time in six ... giant, claiming patent infringement. , ,This time Hyperphrase Technologies ... Internet search engine company, for allegedly using technology that ... other sites or advertisements. Hyperphrase claims that Google Toolbar ...
... enjoyed another year of impressive growth, according to the ... a quarterly publication on the trademark industry published by ... and online brand monitoring services. , ,The report provides ... trademark filing activity, a ranking of leading trademark law ...
Cached Biology Technology:Milwaukee area biotech ZyStor seeks more funding 2Milwaukee area biotech ZyStor seeks more funding 3
... Costar strip ejector is a unique product ... strips from their holder. Linkage: This CLS ... to easily match Cornings product number. If ... the old Sigma-Aldrich number (Z71,314-7) or contact ...
...
... The ideal modular cleanroom for biological ... that require cleanliness (to Class 10/ISO ... precision-joined to create ultra-smooth surfaces that ... disinfect. One-inch radius corners simplify cleaning. ...
This free-standing work station safely ventilates fumes upwards, away from the work surface. Optional Exhaust Purification System features bonded charcoal filters that remove organic chemical vapors ...
Biology Products: