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:5/11/2015)... Calif. , May 11, 2015  Synaptics ... of human interface solutions, today announced the appointment ... President and Chief Financial Officer, reporting to ... replaces Synaptics, current Chief Financial Officer, Kathleen ... 2014. Mr. Ali brings extensive ...
(Date:5/10/2015)... Sweden , May 11, 2015 ... fingerprint sensors FPC1025 and FPC1155 from the distributor World Peace ... of FPC,s distributors in Asia . Deliveries ... sensors will be used by smartphone manufacturers in ... included in the communicated revenue guidance of + 1 000 MSEK ...
(Date:5/6/2015)... , May 6, 2015 LifeBEAM, a ... established helmet producer, announced today that they will expand ... the world,s first bio-sensing cycling helmet and the first ... in two new colors in order to give cyclists ... product. In addition, LifeBEAM and Lazer announced their plan ...
Breaking Biology News(10 mins):Synaptics Appoints Wajid Ali as Senior Vice President and Chief Financial Officer 2Fingerprint Cards Receives Touch Fingerprint Sensor Order of SEK 235 Million 2LifeBEAM and Lazer Announce Expanded Partnership in Bio-Sensing Sports Gear 2LifeBEAM and Lazer Announce Expanded Partnership in Bio-Sensing Sports Gear 3
... 2014 A study conducted by Marie Kmita,s team ... McGill University, shows the importance of the chromatin architecture ... for proper embryonic development. This discovery, recently published in ... a significant impact on the diagnosis of genetic diseases. ...
... in the vicinity of a molecule can change spatial arrangement ... of researchers was able to change persistently positions of the ... a single copper atom to the molecule. A subatomic ... molecule can be switched by approaching a single copper atom ...
... (U of T) have found that the theory behind the ... by blood type--is not valid. The findings are published this ... on the data of 1,455 study participants, we found no ... author of the study, Dr. Ahmed El-Sohemy, Associate Professor and ...
Cached Biology News:Important discovery for the diagnosis of genetic diseases 22-proton bit controlled by a single copper atom 22-proton bit controlled by a single copper atom 3Popular blood type diet debunked 2
(Date:5/28/2015)... -- Quest Diagnostics Incorporated (NYSE: DGX ), the world,s ... is scheduled to speak at the Jefferies 2015 Global ... the company,s President and CEO, will discuss the company,s ... scheduled for Tuesday, June 2, 2015 at 8:00 a.m. ... live during the conference and will be available to ...
(Date:5/28/2015)... Research and Markets( http://www.researchandmarkets.com/research/3nl6s2/neuroprotection ) has ... "Neuroprotection - Drugs, Markets and Companies" ... the role of neuroprotection in acute disorders such ... as well as in chronic diseases such as ... of damage to neural tissues are similar in ...
(Date:5/28/2015)... (PRWEB) May 28, 2015 BioNorth ... serving and representing the life sciences industry in ... of Directors meeting at The Foundry in Dallas ... the organization brought together a broad spectrum of ... underscored the organization's early successes in partnering with ...
(Date:5/28/2015)... and London (PRWEB) May 28, 2015 ... of Computer Aided Engineering software, announced today it ... Inc. (PSRI). CD-adapco will provide state-of-the-art engineering simulation ... will share their expertise and experiences in analyzing ... refining industry members and advance the understanding of ...
Breaking Biology Technology:Quest Diagnostics to Speak at the Jefferies 2015 Global Healthcare Conference 2Global Neuroprotection Market Report 2015-2024 - Drugs, Markets and Companies 2Global Neuroprotection Market Report 2015-2024 - Drugs, Markets and Companies 3BioNorthTX Holds Inaugural Board of Directors Meeting 2BioNorthTX Holds Inaugural Board of Directors Meeting 3CD-adapco and PSRI Chartering New Course in Particle Flow Simulations 2
... at American Society of Pharmacognosy, EMERYVILLE, Calif., ... will present seminal information on a new drug ... 7th Annual Oxford International,Conference on the Science of ... April 12-16, 2008. Scott Baggett, Ph.D., a member ...
... April 14 Codexis, Inc. announced,today that it has ... U.S.,Securities and Exchange Commission ("SEC") relating to the proposed ... of the Codexis,registration statement on Form S-1 can be ... shares being offered and the price,range for the offering ...
... and reduced cost for ... pharmaceutical manufacturers, NEW YORK, ... agreement with Chiral Quest, Inc., a manufacturer and,developer of chiral ... chiral products to the pharmaceutical industry., Effective immediately, Sumitomo ...
Cached Biology Technology:Bionovo Identifies and Describes ER-beta Selective Compounds for the Treatment of Vaginal Dryness 2Bionovo Identifies and Describes ER-beta Selective Compounds for the Treatment of Vaginal Dryness 3Codexis, Inc. Files Registration Statement for Proposed Initial Public Offering 2Sumitomo Corporation of America Named Exclusive Distribution and Sales Agent for Chiral Quest 2
BD BioCoat Gelatin 100 mm Culture Dishes, tissue-culture treated polystyrene with a uniform application of gelatin....
... an internal standard for the quantification of ... 5-OxoETE is a polyunsaturated keto acid formed ... neutrophils. It stimulates cytosolic calcium levels in ... 5-OxoETE selectively stimulates the migration and degranulation ...
...
... The dsRNA Marker consists of ten double-stranded ... 300, 400, 500 and 1,000 base pairs. ... marker for determinating sizes of double-stranded RNAs. ... the dsRNA Marker is adjusted to approximately ...
Biology Products: