Navigation Links
Global ocean currents explain why Northern Hemisphere is the soggier one
Date:10/20/2013

A quick glance at a world precipitation map shows that most tropical rain falls in the Northern Hemisphere. The Palmyra Atoll, at 6 degrees north, gets 175 inches of rain a year, while an equal distance on the opposite side of the equator gets only 45 inches. Scientists long believed that this was a quirk of the Earth's geometry that the ocean basins tilting diagonally while the planet spins pushed tropical rain bands north of the equator. But a new University of Washington study shows that the pattern arises from ocean currents originating from the poles, thousands of miles away.

The findings, published Oct. 20 in Nature Geoscience, explain a fundamental feature of the planet's climate, and show that icy waters affect seasonal rains that are crucial for growing crops in such places as Africa's Sahel region and southern India.

In general, hotter places are wetter because hot air rises and moisture precipitates out.

"It rains more in the Northern Hemisphere because it's warmer," said corresponding author Dargan Frierson, a UW associate professor of atmospheric sciences. "The question is: What makes the Northern Hemisphere warmer? And we've found that it's the ocean circulation."

Frierson and his co-authors first used detailed measurements from NASA's Clouds and Earth's Radiant Energy System, or CERES, satellites to show that sunlight actually provides more heat to the Southern Hemisphere and so, by atmospheric radiation alone, the Southern Hemisphere should be the soggier one.

After using other observations to calculate the ocean heat transport, the authors next used computer models to show the key role of the huge conveyor-belt current that sinks near Greenland, travels along the ocean bottom to Antarctica, and then rises and flows north along the surface. Eliminating this current flips the tropical rain bands to the south.

The reason is that as the water moves north over many decades it gradually heats up, carrying some 4
'/>"/>

Contact: Hannah Hickey
hickeyh@uw.edu
206-543-2580
University of Washington
Source:Eurekalert  

Page: 1 2

Related biology news :

1. Novo Nordisk and BGI establish global collaboration framework
2. EU-funded study underlines importance of Congo Basin for global climate and biodiversity
3. Global warming threat to coral reefs: Can some species adapt?
4. 1 solution to global overfishing found
5. Young researcher taking fight against global killer to the next level in Vietnam
6. Heightened Security Threats and Economic Issues Provide Fillip to Global Civil and Military Biometrics Market, Says Frost & Sullivan
7. Global Information Inc. Announces Discounted Conference Registration For Bio-IT World Asia and Biodetection Technologies 2012
8. Global effort launched to save turtles from extinction
9. New Biotech and Pharmaceutical Market Research from Global Information Inc Forecasts Strong Growth Coming Out of Recession
10. 2012 Forecast for US Molecular Diagnostics Market Now Available From Global Information Inc.
11. Desert to Rainforest global classroom links future teachers, classrooms in Phoenix and Panama
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Global ocean currents explain why Northern Hemisphere is the soggier one
(Date:12/10/2014)... N.C. , Dec. 9, 2014  Wake Forest Baptist ... education building for its School of Medicine. Funding for ... larger capital campaign that will be publicly launched next ... be located in the former 60 series R.J. Reynolds ... Innovation Quarter. Construction will begin immediately with plans to ...
(Date:12/5/2014)... MOUNTAIN VIEW, Calif. , Dec. 4, 2014 ... and safety has boosted investments in new testing ... products has also given rise to a range ... driven by the requirements of Generation Y, which ... digital technologies. As a result, product development strategies ...
(Date:12/3/2014)... , Dec. 2, 2014 As part ... readers, Inception Technologies is pleased to announce the release ... for customers to collect the workforce data that they ... that have been left by existing readers. Many such ... interface, connectivity and modern technology. Older models force users ...
Breaking Biology News(10 mins):Wake Forest Baptist to Build New Medical Education Facility In Wake Forest Innovation Quarter 2Wake Forest Baptist to Build New Medical Education Facility In Wake Forest Innovation Quarter 3Wake Forest Baptist to Build New Medical Education Facility In Wake Forest Innovation Quarter 4Emerging Technologies Enable Smarter Monitoring of Assets, Push Industrial Testing, Inspection and Monitoring Market 2Emerging Technologies Enable Smarter Monitoring of Assets, Push Industrial Testing, Inspection and Monitoring Market 3Emerging Technologies Enable Smarter Monitoring of Assets, Push Industrial Testing, Inspection and Monitoring Market 4Inception Technologies to Release New Biometric Reader 2
... scientific institutions today announced the launch of the Encyclopedia ... 1.8 million named species of animals, plants, and other ... time in the history of the planet, scientists, students, ... living species, even those that have just been discovered. ...
... that could revolutionize manufacturing for certain materials, researchers have ... world. While still slightly less than 2 centimeters long, ... , The fibers--which have the potential to be longer, ... many other materials--could ultimately find use in smart fabrics, ...
... study examines the use of tissue-engineered scaffolding made of ... naturally, to replace defective cartilage tissue. Cartilage cells are ... into the body, where new cartilage tissue is grown ... Artificial Organs. , The procedure was extremely successful in ...
Cached Biology News:World's leading scientists announce creation of 'Encyclopedia of Life' 2World's leading scientists announce creation of 'Encyclopedia of Life' 3World's leading scientists announce creation of 'Encyclopedia of Life' 4The longest carbon nanotubes you've ever seen 2
(Date:12/17/2014)... (PRWEB) December 17, 2014 Gene ... that it has entered into a technology access ... (ADM) to apply DNA2.0’s proprietary protein engineering technology, ... process. , “We are extremely excited that the ... platform. This proprietary bioengineering technology has now ...
(Date:12/17/2014)... SOUTH SAN FRANCISCO, Calif. , Dec. 17, ... positive results of a Phase 2 study evaluating ... for the treatment of patients with severe, chronic ... the current standard of care, including topical steroids ... endpoint was percent change in Visual Analog Scale ...
(Date:12/15/2014)...  GlassesOff Inc. (OTCBB: GLSO) announced today the appointment ... director of the Company,s Board of Directors. ... its CEO until its acquisition by Stanley Black ... Recognized as the inventor of the first Wi-Fi-based Active ... -based RFID solutions focused on improving operational efficiency, safety ...
(Date:12/13/2014)... (PRWEB) December 12, 2014 Clarassance, a ... announced its new name: Therabron Therapeutics , Inc. ... and bronchioles (a type of structure in the lungs ... company’s mission to develop novel protein therapeutics for the ... directors decided to change the name to mark the ...
Breaking Biology Technology:ADM and DNA2.0 Enter Into Protein Engineering Technology Access and Service Agreement 2Velocity Pharmaceutical Development, LLC and Tigercat Pharma, Inc. Announce Phase 2 Results for VPD-737 in Patients With Chronic Pruritus 2Velocity Pharmaceutical Development, LLC and Tigercat Pharma, Inc. Announce Phase 2 Results for VPD-737 in Patients With Chronic Pruritus 3Velocity Pharmaceutical Development, LLC and Tigercat Pharma, Inc. Announce Phase 2 Results for VPD-737 in Patients With Chronic Pruritus 4AeroScout Founder Joins GlassesOff's Board of Directors 2AeroScout Founder Joins GlassesOff's Board of Directors 3Maryland-based Biotech Company's Path Forward in Treating Respiratory Diseases Sparks Name Change 2
... IDIX ) announced today that it will report,its ... Tuesday, November 6,2007 after the U.S. financial markets close. ... release, Idenix,management will host a conference call at 4:30 ... company,s financial results for the third quarter,2007. To ...
... 31 Modigene Inc. (OTC,Bulletin Board: MODG) today announced ... & Renshaw 9th Annual Healthcare Conference on,Wednesday, November 7, ... held at,the New York Palace Hotel in New York ... Novik will attend.,Management will provide a company overview and ...
... DIEGO, Oct. 31 Anadys Pharmaceuticals,Inc. (Nasdaq: ANDS ... Acumen,BioFin(TM) Rodman & Renshaw 9th Annual Healthcare Conference on ... PST). The conference is being,held at the New York ... Executive Officer of Anadys,Pharmaceuticals, Inc. will present an overview ...
Cached Biology Technology:Modigene to Present at Acumen BioFin Rodman & Renshaw 9th Annual Healthcare Conference 2Anadys Pharmaceuticals to Present at the Acumen BioFin Rodman & Renshaw Healthcare Conference 2
... cassette is designed to allow ampicillin selection ... gb2 driving the gene for ampicillin resistance ... Em7 promoter. It mediates higher transcription efficiency ... synthetic polyadenylation signal terminates the ampicillin expression. ...
... cassette is designed to allow ampicillin ... promoter gb2 driving the gene for ampicillin ... the Em7 promoter. It mediates higher transcription ... A synthetic polyadenylation signal terminates the ampicillin ...
... is designed for the fast and simple ... at any position (for the generation of ... is designed to allow neomycin / kanamycin ... combines a prokaryotic promoter (gb2) for expression ...
... Pyronin Y is most widely used ... selectively and differentially stain nucleic acids ... dichromatic dye solution, Pyronin Y stains ... DNA green. Chem comp: ...
Biology Products: