Navigation Links
Africa to take it on chin again with climate change

drought in a surrounding ring that includes southern Africa.

"In our models, the Indian Ocean shows very clear and dramatic warming into the future, which means more and more drought for southern Africa," says Hurrell. "It is consistent with what we would expect from an increase in greenhouse gases."

Hurrell and Hoerling compared model results from 1950-99 to several control runs that omitted the Indian Ocean warming. None of those runs showed the magnitude of drying that actually occurred in southern Africa. When the models did include the Indian Ocean warming, southern Africa consistently dried out. The models also project that by 2049, monsoons across southern Africa could be 10% to 20% drier than the 1950-99 average.

A different process appears to shape rainfall in the Sahel. When sea-surface temperatures are warmer in the South Atlantic than in the North, it pulls the Sahelian monsoon cycle south as well, depriving the region of its usual rains.

"This was the situation during much of the latter half of the 20th century." says Hurrell. "We believe the North Atlantic Ocean cooling was natural and masked an expected greenhouse-gas warming effect."

Since 1990, the sea-surface temperature pattern has reversed, warming more rapidly in the North Atlantic than in the South. The models examined by Hurrell and Hoerling show this trend intensifying in future decades. They project that the Sahel monsoon will be some 20% to 30% wetter by 2049 compared to the 1950-99 average.

The warming of Indian Ocean waters is well beyond the range expected from natural processes. This strengthens the case that greenhouse gases are involved, says Hurrell. In the Atlantic, natural variability affects ocean temperatures more strongly, making it more difficult to attribute changes there to greenhouse-gas effects.

Paleoclimate records show that even greater climate swings have occurred in Africa's monsoons, most likely related to past v
'"/>

Source:NSF


Page: 1 2 3

Related biology news :

1. New push for public health, AIDS spending at African Union summit
2. A comprehensive response to HIV could prevent 10 million AIDS deaths in Africa by 2020
3. Scientists discuss improved biopesticides for locust control in West Africa
4. Reducing malarial transmission in Africa
5. Scientists journey to southern Africa to unravel the secret world of elephant communication
6. Study reveals dramatic difference between breast cancers in US and Africa
7. South African Tribunal Asks For Damages Estimates in GSK AIDS Drug Case
8. Researchers find new giant amphibian fossils in Africa
9. A New Species of Monkey is Discovered in Tanzania: The First in Africa for More Than 20 Years
10. Six million Africans face famine because of locusts, drought
11. Study of energy and health in Africa focuses spotlight on charcoal and forest management
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Africa take chin again with climate change

(Date:9/18/2014)... the International Space Station ever starts a "frequent flyers" ... status. Recently the orbiting laboratory has hosted increasing numbers ... returned from the space station in April, and another ... third experiment is planned to launch in December. , ... around the world-- and in space. Model organisms can ...
(Date:9/18/2014)... genetic information is stored in DNA, tiny strands of ... our bodies. To express this genetic data, our DNA ... instructions into proteins that perform tasks in our cells. ... type of RNA molecule. Unlike all other known RNAs, ... Although circRNA molecules are abundant, little has been known ...
(Date:9/18/2014)... to be cheerful, happy-go-lucky characters, so you might expect ... , In fact some dogs are distinctly more ... shows. , "This research is exciting because it ... and non-invasively. It offers researchers and dog owners an ... changes," said Dr Melissa Starling, from the Faculty of ...
Breaking Biology News(10 mins):Buzzing with activity: Fruit flies orbit Earth for science 2Buzzing with activity: Fruit flies orbit Earth for science 3Buzzing with activity: Fruit flies orbit Earth for science 4Scientists find how mysterious 'circular RNA' is formed, claim muscular dystrophy link 2Dogs can be pessimists too 2Dogs can be pessimists too 3
... or a missed ball can put a crimp in an ... but the processes occurring under the skin remain full of ... blood cells, mobilize to protect injured body tissue from infection. ... othersare attracted to damaged tissue. The response begins when ...
... should abandon the concept of carbon emissions trading in ... to genuine reductions in the amount of carbon dioxide ... mechanism for reducing climate change. Details of the carbon ... Environmental Review . Carbon emissions trading was to ...
... reproductive biologist has achieved a major breakthrough in IVF ... around the world who have suffered previous miscarriages after ... Research Fellow and member of the University,s Robinson Institute, ... product which improves IVF embryo implantation rates for some ...
Cached Biology News:Researchers investigate why a limited number of white blood cells are attracted to injured tissue 2Carbon swap bank to beat climate change 2Carbon swap bank to beat climate change 3IVF breakthrough to hit the world market 2
(Date:9/19/2014)...  An entire month is dedicated to one of ... disease (CMT) – a debilitating neuromuscular disease affecting the ... weakness, and foot and hand deformities. CMT affects 1 ... is a progressive disease, and over time patients lose ... such as leg braces, wheelchairs and scooters to get ...
(Date:9/19/2014)... Charlotte, NC (PRWEB) September 19, 2014 ... Certified Biobased Product Label for its Organic Cotton ... the product’s amount of renewable biobased ingredients meets or ... or intermediate materials composed in whole or in significant ... “This logo/label will allow our Organic cotton to be ...
(Date:9/18/2014)... 2014 Bipartisan passage this week by ... to stimulate development and commercialization of new technologies and ... leaders of SPIE, the international society for optics ... and Innovation (RAMI) Act, now moves to the full ... they are optimistic that it will win passage there ...
(Date:9/18/2014)...  Health Enhancement Products, Inc. (OTCQB: HEPI), a ... and metabolic processes, is pleased to announce the addition of ... Nola E. Masterson , a California ... September 17, 2014. "We,re very pleased and ... states Andrew Dahl , President and CEO. "She joins ...
Breaking Biology Technology:September is Charcot-Marie-Tooth (CMT) Awareness Month - Scheduled events, activities and important partnerships announced throughout the month! 2Barnhardt Manufacturing Company Earns USDA Certified Biobased Product Certification and Label for Organic Cotton 2House passage of high-tech manufacturing bill is move toward stronger economy, say SPIE leaders 2House passage of high-tech manufacturing bill is move toward stronger economy, say SPIE leaders 3Health Enhancement Announces New Board Member In Advance Of Annual Shareholder Meeting 2
... BRAY, Ireland, December 20, 2011 Osteologix Holdings, ... 0.06 per sharepayable to shareholders of record on December 19, ... payment date is being delayed to allow time for certain ... the Company by shareholders prior to dividend payment. ...
... The new measurements, by UCLA physics professor Giovanni Zocchi and ... times higher in resolution than previous mechanical measurements, a nanotechnology ... a solid nor a liquid. "Proteins are the molecular ... said. "We have found that sometimes they behave as a ...
... tasks -- may have applications in areas outside of ... and his collaborators. Working at the interface of ... Pitt,s Department of Physics and Astronomy in the Kenneth ... colleagues report their findings in a paper published online ...
Cached Biology Technology:Osteologix Announces Dividend 2Osteologix Announces Dividend 3UCLA physicists report nanotechnology feat with proteins 2Quantum computing has applications in magnetic imaging, say Pitt researchers 2
... and Tissue Staining Kits are intended for ... of histological and cytological specimens. These kits ... manufactured by either R&D Systems or by ... the formation of the Avidin-Biotin Complex (ABC) ...
... jetSI-ENDO is an easy-to-use siRNA transfection ... out endogenous genes in a variety of ... comes with an optimized, straightforward protocol. High ... are obtained following transfection of 20 to ...
... jetSI-ENDO-FluoR is a tetramethylrhodamine-conjugated ... emission at 580 nm), the ... reagents are used to determine ... the intracellular delivery and trafficking ...
... in a Morris Water Maze. Tracks up ... sequence of trials.The Spatial Behavior line is a ... camera, frame grabber, and feature extraction software and ... up to 6 moving animals. Software automatically ...
Biology Products: