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:4/17/2014)... cells in bone marrow need to produce hydrogen sulfide ... according to a new study from the Center for ... Dentistry of USC. , Professor Songtao Shi, principal investigator ... produced by the cells governs the flow of calcium ... signals that results in osteogenesis, or the creation of ...
(Date:4/17/2014)... German . If ... of him, he can expect his premises to be trashed. ... the consequences is enough to make restaurant owners pay up. ... their eggs in other birds, nests. If the host birds ... revenge by destroying the entire nest. Consequently, it is beneficial ...
(Date:4/17/2014)... in France have hit on a novel method ... the correct and most effective treatment possible., Kidney ... western and developing world. If left untreated, apart ... renal failure and other complications. In many patients ... Clearly a more effective pathological approach to diagnosis ...
Breaking Biology News(10 mins):Fear of the cuckoo mafia 2Fear of the cuckoo mafia 3
... World Conservation Union reported an unprecedented decline in biodiversity, ... to most species is loss of habitat. And as ... to accurately predict the population dynamics and extinction risk ... a new study, John Drake tests models traditionally used ...
... genetic testing methods helped public health officials control and ... hepatitis A virus in 2003 related to the consumption ... in the October 15 issue of The Journal of ... the study, Joseph J. Amon, PhD, MSPH, and colleagues ...
... University of Barcelona, Spain, show for the first time ... the secondary fermentation of the sparkling wine known as ... General Meeting of the American Society for Microbiology. , ... impact upon sparkling wine quality in terms of aroma, ...
Cached Biology News:Traditional models underestimate extinction rates 2New tools used to control foodborne hepatitis A outbreaks related to green onions 2After the yeast is gone bacteria continue to develop flavor of sparkling wine 2
(Date:1/14/2014)... WASHINGTON , Jan. 14, 2014  3D Communications, a leading provider ... scientific, regulatory, business, and media events in the United ... its former associate Virginia Cox , JD, is returning to ... Virginia Cox re-joins 3D after more than two years ...
(Date:1/14/2014)... , Jan. 14, 2014 The largest international ... medicinal plants and therapeutic derivatives thereof has endorsed ... and researchers about the challenges of adulterated herb ... ) The Society for Medicinal ...
(Date:1/14/2014)... Canada (PRWEB) January 14, 2014 In ... its motives and methods in product development and promotion ... the industry. This mistrust, fueled by concerns about the ... fed by reports of spectacular fines to the world’s ...
(Date:1/14/2014)... ®, provider of RapidResponse ®, a cloud-based supply chain ... S&OP ) service, is proud to be a gold sponsor ... at the Hilton San Diego Bayfront, January 30 – 31, ... , Director of Supply Chain at Amgen, as she presents ...
Breaking Biology Technology:Former FDA Associate Commissioner Returns To 3D Communications 2World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 2World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 3World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 4World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 5World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 6World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 7World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 8The Sunshine Act: Necessary Regulation or Unnecessary Dysregulation? New Life Science Webinar Hosted by Xtalks and IRB Services 2The Sunshine Act: Necessary Regulation or Unnecessary Dysregulation? New Life Science Webinar Hosted by Xtalks and IRB Services 3Event Alert: Kinaxis Customer to Present at the Biomanufacturing Summit "Supply Chain: Improving Network Effectiveness" 2
... MATK ) announced today that life,sDHA(TM), its ... brain and eye development, is now,available to Eastern ... Walmark. Featuring 200 mg per serving of life,sDHA,Pregnium ... Republic, Slovakia,and Romania., "There is a strong ...
... BEIJING and CLAREMONT, Calif., June 25 /Xinhua-PRNewswire-FirstCall/ ... Board: KWBT),announced that on June 23rd, 2008, ... received approval documents from the Ministry of,Commerce ... Kiwa Shandong to,wholesale other companies, fertilizer products, ...
... Enables Enhanced Productivity and Decreased Expenses, ... the global leader,in helping academic, healthcare and ... today announced that BioMarin,Pharmaceutical Inc., a leading ... SciQuest eprocurement platform to streamline and,enhance procurement ...
Cached Biology Technology:Eastern European Supplement Leader Walmark Launches Prenatal Product Featuring Martek's life'sDHA(TM) 2Eastern European Supplement Leader Walmark Launches Prenatal Product Featuring Martek's life'sDHA(TM) 3Kiwa Bio-Tech Receives Authorization From the Ministry of Commerce of the People's Republic of China to Wholesale Other Fertilizer Manufacturers Products 2Kiwa Bio-Tech Receives Authorization From the Ministry of Commerce of the People's Republic of China to Wholesale Other Fertilizer Manufacturers Products 3SciQuest Announces Newest Life Sciences Customer; BioMarin Pharmaceutical Drives Spending Effectiveness with Automated, Intuitive Procurement 2
iEMS Thermal Microplate Holder...
Improve inventory management with stainless steel red cell canisters; ensure product safety with CO2 or LN2 backup systems. A complete solution for your blood banking needs....
Improve inventory management with stainless steel red cell canisters; ensure product safety with CO2 or LN2 backup systems. A complete solution for your blood banking needs....
... RNase H- Reverse Transcriptase (RT) is an ... RT. It is a DNA polymerase that ... RNA DNA or an RNA:DNA hybrid. This ... of point mutations rather than a deletion ...
Biology Products: