HOME >> BIOLOGY >> NEWS
West African Ocean sediment core links monsoons to global climate evolution

(Santa Barbara, Calif.) -- Monsoons, the life-giving, torrential rains of Asia and Africa, have an ancient, unsuspected connection to previous Ice Age climate cycles, according to scientists at the University of California, Santa Barbara, and at Kiel University in Germany.

Analyzing a 120-foot sediment core from the Gulf of Guinea in equatorial West Africa recovered by a German research expedition, UC Santa Barbara postdoctoral scholar Syee Weldeab and paleoclimatologist David Lea have revealed 155,000 years of continuous monsoon history. It is the longest, most detailed record of West African monsoons that has ever been reconstructed, said Lea. The find captured several Ice Age climate cycles.

From chemical data locked into fossil plankton shells, the researchers documented how the strength of ancient monsoons is directly tied to two factors: the Northern Hemispheres climate shifts due to the expansion and contraction of the European and North American continental ice sheets, and the amount of local solar radiation hitting the African region.

This is the first study to definitively tie together the influence of these two factors over several climate cycles, said Lea, who has published the collaborative results in the June 1 issue of the journal Science under the heading 155,000 Years of West African Monsoon and Ocean Thermal Evolution. He noted that there is a dramatic resurgence of the West African monsoon at the end of each glacial cycle.

The studys importance to the modern climate, said Lea, lies in its demonstration of the sensitivity of the monsoon region to global climate conditions. With hundreds of millions of people dependent on subsistence agriculture in these regions, he said, Insights from the study of ancient climate cycles will lead to more confident predictions of how monsoon patterns will evolve in a future warmed by greenhouse gases.


'"/>

Contact: Vic Cox
vic.cox@ia.ucsb.edu
805-893-4765
University of California - Santa Barbara
31-May-2007


Page: 1

Related biology news :

1. Clues to future evolution of HIV come from African green monkeys
2. First all-African produced genetically engineered maize is resistant to maize streak virus
3. New clue why MS affects African-Americans differently than Caucasians
4. Stressed-out African naked mole-rats may provide clues about human infertility
5. Slow wave activity during sleep is lower in African-Americans than Caucasians
6. OSA symptoms more common among African-American women than Caucasians
7. African carnage -- 1 years seized ivory likely came from 23,000 elephants
8. Survey finds perceived risk of recurrence low in African-American breast cancer survivors
9. African-Americans at increased risk for earlier preterm births
10. Missouris African-American mothers more likely to deliver prematurely
11. Study provides first genetic evidence of long-lived African presence within Britain

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:6/14/2017)... (NYSE: IBM ) is introducing several innovative partner startups ... collaboration between startups and global businesses, taking place in ... nine startups will showcase the solutions they have built with ... France is one of the ... percent increase in the number of startups created between 2012 ...
(Date:5/16/2017)...  Veratad Technologies, LLC ( www.veratad.com ), an innovative ... verification solutions, announced today they will participate as a ... thru May 17, 2017, in Washington D.C.,s ... Identity impacts the lives of billions ... evolving digital world, defining identity is critical to nearly ...
(Date:5/6/2017)... 5, 2017 RAM Group , ... new breakthrough in biometric authentication based on a ... properties to perform biometric authentication. These new sensors are ... created by Ram Group and its partners. This sensor ... supply chains and security. Ram Group is a ...
Breaking Biology News(10 mins):
(Date:10/9/2017)... 2017  BioTech Holdings announced today identification and ... ProCell stem cell therapy prevents limb loss in ... demonstrated that treatment with ProCell resulted in more ... compared to standard bone marrow stem cell administration.  ... reduction of therapeutic effect.  ...
(Date:10/9/2017)... ... October 09, 2017 , ... ... line of medical marijuana products targeting the needs of consumers who are incorporating ... Kindred takes place in Phoenix, Arizona. , As operators of two successful Valley ...
(Date:10/7/2017)... , ... October 06, 2017 ... ... in Hi-C-based genomic technologies, launched its ProxiMeta™ Hi-C metagenome deconvolution product, featuring ... kit and accompanying cloud-based bioinformatics software to perform Hi-C metagenome deconvolution using ...
(Date:10/6/2017)... ... 06, 2017 , ... On Tuesday, October 24th, ABC² (Accelerate ... first-ever adaptive clinical trial for glioblastoma (GBM). The featured speaker will be Dr. ... open to the public, but registration is required. , WHAT: ABC² Brain ...
Breaking Biology Technology:
Cached News: