Navigation Links
Icebergs in the Antarctic play important role in carbon cycle
Date:3/28/2011

Icebergs cool and dilute the ocean water they pass through and also affect the distribution carbon-dioxide-absorbing phytoplankton in the Southern Ocean, according to a team of researchers from UC San Diego and the University of San Diego.

The effects are likely to influence the growth of phytoplankton in the Atlantic sector of the Southern Ocean and especially in an area known as "Iceberg Alley" east of the Antarctic Peninsula.

Enhanced phytoplankton growth would increase the rate at which carbon dioxide is removed from the ocean, an important process in the carbon cycle, said the leaders of the National Science Foundation (NSF)-funded study.

The results appear in the journal Deep-Sea Research II in a paper titled "Cooling, dilution and mixing of ocean water by free-drifting icebergs in the Weddell Sea." The main results from this paper were also highlighted in Nature Geoscience's March issue.

"Iceberg transport and melting have a prominent role in the distribution of phytoplankton in the Weddell Sea," said paper lead author John J. Helly, who holds joint appointments at the San Diego Supercomputer Center and Scripps Institution of Oceanography at UCSD. "These results demonstrate the importance of a multi-disciplinary scientific team in developing a meaningful picture of nature across multiple scales of measurement and the unique contributions of ship-based field research."

"The results demonstrate that icebergs influence oceanic surface waters and mixing to greater depths than previously realized," added paper co-author Ronald S. Kaufmann, Associate Professor of Marine Science and Environmental Studies at the University of San Diego.

The findings document a persistent change in physical and biological characteristics of surface waters after the transit of an iceberg. The change in surface water properties such as salinity lasted at least ten days, far longer than had been expected.

Sampling was conducted by a surface-mapping method used to survey the area around an iceberg more than 32 kilometers (20 miles) in length. The team surveyed the same area again ten days later, after the iceberg had drifted away. After ten days, the scientists observed increased concentrations of chlorophyll a and reduced concentrations of carbon dioxide compared to nearby areas without icebergs.

"We were quite surprised to find the persistence of the iceberg effects over many days," said Helly, director of the Laboratory for Environmental and Earth Sciences at SDSC.

The new results demonstrate that icebergs provide a connection between the geophysical and biological domains that directly affects the carbon cycle in the Southern Ocean. This research significantly extends previous research results conducted in the same environment and reveals the dynamic properties of icebergs and their effects on the ocean in unexpected ways.

"These findings confirm that icebergs are a dynamic and significant component of polar ecosystems," said Roberta L. Marinelli, director of the NSF's Antarctic Organisms and Ecosystems Program.


'/>"/>

Contact: Robert Monroe or Mario Aguilera
scrippsnews@ucsd.edu
858-534-3624
University of California - San Diego
Source:Eurekalert  

Related medicine news :

1. Launch of On Time Air Filters: Home Air Filter Delivery Service Helps Homeowners Replace All-Important Home HVAC Filters On Time
2. Mayo Clinic researchers find oncogene is important in pancreatic cancer growth and spread
3. NORD Calls FDA Action An Important Advance for Patients
4. Galfand Berger Wins Important Case for Injured Workers in Pennsylvania
5. Author Proves What Celebrities are Learning in "Who Do You Think You Are?" is More Important Than They Realize
6. Frances national program to reduce HAIs reports important successes; uses mandatory reporting
7. A Monumentally Important Victory for Our Country
8. Recurrence of breast cancer after more than 10 years is an important indicator of survival
9. VA Proposes Important Amendment to Expand Healthcare for Veterans
10. Teaching medicine series covers the most important topics in medical education
11. LocumTenens.com Offers Important Tax Tips for 1099 Workers
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Icebergs in the Antarctic play important role in carbon cycle
(Date:2/6/2016)... (PRWEB) , ... February 06, 2016 , ... Shark ... to announce the launch of a new DRTV campaign with Belly Bands. , Having ... tried everything from sprays to puppy pads and find nothing works, get Belly ...
(Date:2/5/2016)... ... February 05, 2016 , ... Steven Tonkinson, 36, of Coconut Grove, ... year since it started in 2003. This year, he ran all 26.2 miles with ... and NBA team the Miami Heat. , This Sunday, while many are watching the ...
(Date:2/5/2016)... , ... February 05, 2016 , ... ... availability of the company's lighter, sleeker next generation LYNX VR Indoor Trainer with ... , Improvements in design and manufacturing not only reduce the weight of the ...
(Date:2/5/2016)... , ... February 05, 2016 , ... ... setting the stage for new clinical and scientific initiatives have all marked the ... she was appointed President and CEO of the nation’s oldest cancer center, Candace ...
(Date:2/5/2016)... ... February 05, 2016 , ... ... franchisees of Popeyes Louisiana Kitchen restaurants, launched the 14th annual “Appetite for a ... and adults with muscular dystrophy, ALS and related diseases that severely limit strength ...
Breaking Medicine News(10 mins):
(Date:2/5/2016)... , Feb. 5, 2016 Dehaier Medical ... or the "Company"), which develops, markets and sells ... China and international markets, ... which aims to concentrate the Company,s resources to ... respiratory business and to focus more on its ...
(Date:2/5/2016)... 2016  Henry Schein, Inc. (NASDAQ: HSIC ), the ... to office-based dental, animal health and medical practitioners, announced ... acquire a majority ownership interest in Dental Cremer S.A., ... Brazil . --> ... is the dental distribution business of Cremer S.A. With ...
(Date:2/5/2016)... DUBLIN , Feb. 5, 2016 /PRNewswire/ ... the addition of the "Global Obstetrics ... company profile to their offering. ... addition of the "Global Obstetrics Partnering ... company profile to their offering. --> ...
Breaking Medicine Technology: