Navigation Links
Tropical Atlantic cooling and African deforestation correlate to drought, report scientists

Against the backdrop of the Montreal Summit on global climate being held this week, an article on African droughts and monsoons, by a University of California, Santa Barbara scientist and others, which appears in the December issue of the journal Geology, underlines concern about the effects of global climate change.

Tropical ocean temperatures and land vegetation have an important effect on African monsoon systems, explains first author Syee Weldeab, a post-doctoral fellow in the Department of Earth Science at the University of California, Santa Barbara. The monsoons are critical to sustaining agriculture in equatorial Africa.

Weldeab says that man's reduction of inland vegetation cover through deforestation and overgrazing in equatorial Africa and increases in global temperatures through the emission of greenhouse gases will likely strongly affect the African monsoon system in the future.

"The weakening of the monsoon has a huge effect," says Weldeab, "resulting in shortages of harvests and hunger."

As vegetation is cleared, the land loses its capacity to retain heat and becomes cooler. As the land cools relative to the ocean, there is a larger gradient between the ocean temperature and the land causing less moisture to be pulled from the ocean air toward the land.

Weldeab and his colleagues studied cores from beneath the ocean floor of the Gulf of Guinea, in the tropical Atlantic just off the coast of Cameroon, to understand the history of climate in the area for the past 10,000 years. The cores contain foraminifera, tiny plankton shells that are composed of calcium and trace elements. By studying the ratios of magnesium and calcium in the shells, the scientists are able to correlate that information to past temperature changes in the ocean. In analyzing these records for the past 10,000 years, the scientists found three pronounced cooling periods which indicate drought.

Besides the ocean records, the scientists a
'"/>

Source:University of California - Santa Barbara


Page: 1 2

Related biology news :

1. Finding Cures For Tropical Diseases: Is Open Source An Answer?
2. Tropical Deforestation affects rainfall in the U.S. and around the globe
3. Tropical dry forests receive international recognition
4. Tropical forest CO2 emissions tied to nutrient increases
5. Tropical forests -- Earths air conditioner
6. FSU scientist warns North Atlantic right whale facing extinction
7. Ancient trans-Atlantic swarm brought locusts to the New World
8. Microbes hitchhike across Atlantic on desert dust
9. How satellite tracking revealed the migratory mysteries of endangered Atlantic loggerhead turtles
10. Brazil creates buffer zone around coral reefs off Atlantic coast
11. A dichotomy in migration patterns found for sea turtles in east Atlantic
Post Your Comments:
(Date:4/2/2015)... BETHESDA, Md. , April 2, 2015 ... Salt Lake City , the American ... election of five new directors to its Board.  Members ... for the ACMG and for forming and advancing its ... the medical genetics profession. "It,s an eventful ...
(Date:4/1/2015)...   Medisafe ™, the leading global medication management ... and Android smartphones and tablets, announces ... platform to allow patients to track and correlate their ... patients will be able to visualize in real-time how ... such as glucose levels and blood pressure. ...
(Date:3/26/2015)... -- The Granite Club, Canada,s ... today announced it has implemented a state-of-the-art access and ... members and staff, while restricting access to authorized users ... FST,s IMID Access system because it has the perfect ... staff, in addition to unparalleled security," said James ...
Breaking Biology News(10 mins):American College of Medical Genetics and Genomics Announces New Board Members: Dr. Louanne Hudgins is ACMG President-Elect 2American College of Medical Genetics and Genomics Announces New Board Members: Dr. Louanne Hudgins is ACMG President-Elect 3American College of Medical Genetics and Genomics Announces New Board Members: Dr. Louanne Hudgins is ACMG President-Elect 4American College of Medical Genetics and Genomics Announces New Board Members: Dr. Louanne Hudgins is ACMG President-Elect 5American College of Medical Genetics and Genomics Announces New Board Members: Dr. Louanne Hudgins is ACMG President-Elect 6American College of Medical Genetics and Genomics Announces New Board Members: Dr. Louanne Hudgins is ACMG President-Elect 7American College of Medical Genetics and Genomics Announces New Board Members: Dr. Louanne Hudgins is ACMG President-Elect 8Medisafe Announces Launch of Biometric Integration, Enabling Patients to Stay Adherent to Their Meds and See Tangible Health Results 2Granite Club First Private Club in North America to Implement FST Biometrics Secure Access Solution, as Part of Multi-million Dollar Expansion 2
... that increase the risk of developing endometriosis, a common ... of this often very painful condition, which has a ... Details of the research, carried out at ... Nuffield Department of Obstetrics & Gynaecology, University of Oxford; ...
... Men with type 1 diabetes may be able ... tissue, say Georgetown University Medical Center (GUMC) researchers who ... Cell Biology 50th annual meeting in Philadelphia. Their laboratory ... human spermatogonial stem cells (SSCs) extracted from testicular tissue ...
... treatment of breast cancer just because a woman is pregnant, ... Breast Group. This suggestion is based on study results ... Loibl presented this data at the 33rd Annual CTRC-AACR San ... the time we started the study in 2003, there was ...
Cached Biology News:Genetic variants linked to increased risk of common gynecological disease 2'Grow your own transplant' may be possible for men with type 1 diabetes 2Unique needs and outcomes of pregnant women with breast cancer identified 2
(Date:5/1/2015)... , May 1, 2015 Pfenex ... engaged in the development of biosimilar therapeutics including ... today that its first quarter 2015 financial results ... before the open of market. At 8:30 am Eastern ... to discuss the financial results and provide a ...
(Date:5/1/2015)... 2015 Investor-Edge has initiated ... (NASDAQ: GENE ), Agilent Technologies Inc. (NYSE: ... TMO ), Sequenom Inc. (NASDAQ: SQNM ... Free research report on Genetic Technologies can be ... 30, 2015, the NASDAQ Composite ended at 4,941.42, ...
(Date:5/1/2015)... RESEARCH TRIANGLE PARK, N.C. , May 1, 2015 /PRNewswire/ ... Roger Jeffs , Ph.D., President and Co-Chief Executive Officer ... the company,s business at the Deutsche Bank 40 th ... . The presentation will take place on Wednesday, ... be accessed via a live webcast on the United Therapeutics ...
(Date:4/30/2015)... DIEGO , April 30, 2015   Tamir ... announced today an update on its Ebola antiviral therapy ... Tamir,s leading candidates, TMR004, is currently being evaluated and ... of the battle against Ebola. During the first quarter ... And Leadership Meeting To Accelerate The Evaluation of Potential ...
Breaking Biology Technology:Pfenex To Report First Quarter 2015 Results and Provide Business Update on Thursday, May 14, 2015 2Life Sciences Tools and Services Stocks on our Radar -- Genetic Technologies, Agilent Technologies, Thermo Fisher Scientific, Sequenom, and PerkinElmer 2Life Sciences Tools and Services Stocks on our Radar -- Genetic Technologies, Agilent Technologies, Thermo Fisher Scientific, Sequenom, and PerkinElmer 3Life Sciences Tools and Services Stocks on our Radar -- Genetic Technologies, Agilent Technologies, Thermo Fisher Scientific, Sequenom, and PerkinElmer 4Life Sciences Tools and Services Stocks on our Radar -- Genetic Technologies, Agilent Technologies, Thermo Fisher Scientific, Sequenom, and PerkinElmer 5Tamir Biotechnology Provides Update on TMR004 Development Against Mutating Ebola 2Tamir Biotechnology Provides Update on TMR004 Development Against Mutating Ebola 3Tamir Biotechnology Provides Update on TMR004 Development Against Mutating Ebola 4
... Overview , ... the separation and purification of a number of biological molecules. For ... A, or a protein may be purified on the basis of ... purifications take place in a chromatographic column with a relatively large ...
... Purpose , Agricultural ... effectively and efficiently using LC/MS/MS. These agricultural compounds are extracted from ... Overview , ... great importance on the identification and quantitation of insecticides and herbicides ...
... Abstract , ... techniques that produce highpurity total RNA from biological sources such as ... or other manual handling, and produce a highly pure product, free ... These new techniques respond to the ...
Cached Biology Technology:Use of ZipTip Pipette Tips for Microscale Affinity Mass Spectrometry 2Use of ZipTip Pipette Tips for Microscale Affinity Mass Spectrometry 3Identification of Insecticides and Herbicides by LC/MS/MS Using the API 2000 LC/MS/MS System 2Total RNA Purification from Cultured Cells Using the ABI PRISM 6700 Automated Nucleic Acid Workstation and Total RNA Lysis Reagents 2Total RNA Purification from Cultured Cells Using the ABI PRISM 6700 Automated Nucleic Acid Workstation and Total RNA Lysis Reagents 3Total RNA Purification from Cultured Cells Using the ABI PRISM 6700 Automated Nucleic Acid Workstation and Total RNA Lysis Reagents 4Total RNA Purification from Cultured Cells Using the ABI PRISM 6700 Automated Nucleic Acid Workstation and Total RNA Lysis Reagents 5Total RNA Purification from Cultured Cells Using the ABI PRISM 6700 Automated Nucleic Acid Workstation and Total RNA Lysis Reagents 6