Subscribe to our free daily newsletters
. Earth Science News .




Subscribe to our free daily newsletters



WOOD PILE
Extreme Amazon weather could have global climate consequences
by Staff Writers
Cape Cod MA (SPX) Oct 13, 2015


This image shows a dry season soy field in the Southeastern corner of the Amazon. Image courtesy Chris Linder. For a larger version of this image please go here.

A new paper co-authored by WHRC scientists Philip Duffy and Paulo Brando evaluates the accuracy of current climate models and uses them to project future drought and wet periods in the Amazon.

They conclude that the whole of the Amazon will confront more hydrological extremes, and that most of the region will experience much more frequent and extensive drought. These changes would have profound implications for forest structure, composition, biomass, and carbon emissions.

According to Dr. Duffy, "Historically, the main source of CO2 emissions from Amazon forests has been direct human action, especially deforestation. However, in the future, climate change may cause large emissions that result from changes in the large-scale environment rather than from direct human action, and hence are much more difficult to control.

This study, based on 35 climate models, suggests that future climate change will increase the frequency and geographic extent of meteorological drought in most of Amazon. This may contribute to forest degradation and increased emissions of CO2 to the atmosphere, amplifying global warming."

This past year, Brazil has endured drought in Sao Paulo and record-high floods in Acre and Rodonia, showing that hydrological extremes are already affecting the lives of millions in Brazil.

These extremes are expected to become more frequent according to Dr. Brando, "The best climate model simulations predict extreme periods of dryness and wetness across different parts of the Amazon and a longer dry season. We know that these results are important for forest dynamics, forest fires, food production; river transportation, hydroelectric power and flooding. However, we are still figuring how important they are. "

The team of scientists led by Dr. Duffy analyzed the properties of recent and future meteorological droughts in climate models used by the Intergovernmental Panel on Climate Change (IPCC) and found they accurately reproduce mechanisms that have produced historical droughts.

The models predict different outcomes in the eastern and western Amazon - more frequent droughts are expected in the east, while less frequent droughts are expected in a small part of the region located in the west. Collectively, the area of the Amazon affected by mild and severe drought is expected to double and triple respectively by 2100 and increased wetness is expected after 2040.

Although there are uncertainties associated with model simulations far into the future, the team concludes that current greenhouse gas emissions will increase the likelihood of extreme weather that will negatively impact Amazonian forests.

For Dr. Paulo Moutinho of the Amazon Environmental Research Institute (IPAM), "Beyond the implications for the Amazon forest related to climate change, this important study represents a clear alert to Brazil and other Amazonian countries that only forest conservation on a large scale will reduce a risk of a forest and regional agriculture collapse in the future."

The Woods Hole Research Center (WHRC) is an independent research institute where scientists investigate the causes and effects of climate change to identify and implement opportunities for conservation, restoration and economic development around the globe. In June 2015, WHRC was ranked as the top independent climate think tank in the world for the second year in a row. For more information, please visit whrc.org.


Thanks for being here;
We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain.

With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords.

Our news coverage takes time and effort to publish 365 days a year.

If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.

SpaceDaily Contributor
$5 Billed Once


credit card or paypal
SpaceDaily Monthly Supporter
$5 Billed Monthly


paypal only

.


Related Links
Woods Hole Research Center
Forestry News - Global and Local News, Science and Application






Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle

Previous Report
WOOD PILE
Smithsonian scientists say vines strangle carbon storage in tropical forests
Panama City, Panama (SPX) Oct 13, 2015
Although useful to Tarzan, vines endanger tropical forests' capacity to store carbon. In a major experimental study in Panama, Smithsonian researchers showed that woody vines, or lianas, slow tropical forest tree growth and may even cause premature tree death. Lianas reduced aboveground carbon uptake by more than three-quarters, threatening the forests' ability to buffer climate change. Tr ... read more


WOOD PILE
Man survives on ants for six days in remote Australia

New warehouse blast hits Tianjin: China state media

LORELEI Imagines Rapid Automated Language Toolkit

Drama therapy breaks new ground for Iraq's teenage girls

WOOD PILE
Using optical fiber to generate a two-micron laser

Dielectric film has refractive index close to air

Northrop Grumman upgrading G/ATOR radar system

Raytheon's AESA 360-degree radar moves toward production

WOOD PILE
Global marine analysis suggests food chain collapse

A balanced diet is good for corals too, study finds

Food chain collapse predicted in world's oceans

Sea level rise will swallow Miami, New Orleans: study

WOOD PILE
Could 'The Day After Tomorrow' happen?

New study projects that melting of Antarctic ice shelves will intensify

Scientists catch billions of juvenile fish under arctic sea ice

Arctic Militarization 'Moot Point' - NORAD Commander

WOOD PILE
Trade in invasive plants is blossoming

Colorful caterpillar chemists

Accurate timing of migration prolongs life expectancy in pike

Fertilizing and recycling Si in Vietnamese fields

WOOD PILE
Volcanic eruptions affect flow of world's major rivers

Simulating path of 'magma mush' inside an active volcano

Ecuador volcano spews giant ash column

Guatemala volcano roars back to life

WOOD PILE
Cow dung and old tyres inspire S.African township artists

Pro-Compaore politician arrested in Burkina over failed coup

Eutelsat and Facebook to partner on vsat initiative to get Africa online

Two Niger soldiers killed in 'Boko Haram ambush'

WOOD PILE
Breakthrough for electrode implants in the brain

Researchers build a digital piece of brain

Foot fossils of human relative shows evolutionary 'messiness' of bipeds

Research reveals new clues about how humans become tool users




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News






The content herein, unless otherwise known to be public domain, are Copyright 1995-2017 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. All articles labeled "by Staff Writers" include reports supplied to Space Media Network by industry news wires, PR agencies, corporate press officers and the like. Such articles are individually curated and edited by Space Media Network staff on the basis of the report's information value to our industry and professional readership. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement