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:5/31/2016)... ... May 31, 2016 , ... CallTrackingMetrics's software gives ... monitor the performance of sales and support staff, and to efficiently route calls ... allows customers to record, transcribe, route, document, and report on everything going on ...
(Date:5/31/2016)... ... ... The Global Wellness Summit (GWS), an annual conference for international leaders ... spa and beauty in Europe. The organization asked its partner experts in Europe - ... - to forecast where wellness is headed in Europe. Predictions range from European nations ...
(Date:5/31/2016)... ... 2016 , ... Interest is on the rise for using the CRISPR-Cas9 system ... for RNAi hit validation. A key reason may be that high-throughput synthesis—combined with a ... RNA (crRNA) collections in arrayed formats. , Arrayed crRNA screens have ...
(Date:5/31/2016)... ... ... Dr. Charles A. Ditta attained his Doctor of Medical Dentistry Degree from ... where he graduated in the top ten percentile of his class. Dr. Ditta has ... has been a member in good standing for thirty years in the American Dental ...
(Date:5/30/2016)... (PRWEB) , ... May 30, 2016 , ... As the ... for their children and their efforts to keep their households lice free. , ... Hawaii are enacting new policies that keep kids in the classroom despite the fact ...
Breaking Medicine News(10 mins):
(Date:5/31/2016)... May 31, 2016  Diplomat Pharmacy, Inc. (NYSE: ... that Phil Hagerman , Chairman & CEO, and ... Blair 36 th Annual Growth Stock Conference in ... Mr. Whelan are scheduled to present at the conference on ... live audio-only webcast of the presentation and related presentation materials ...
(Date:5/31/2016)... , May 31, 2016 ... and Annotate Content From Elsevier,s ScienceDirect Database ... scientific, technical and medical information products and services, ... Berlin -based scientific collaboration platform PaperHive to enable ... over 12 million articles on ScienceDirect , ...
(Date:5/31/2016)... PUNE, India , May 31, 2016 ... 2016" market research report with comparative analysis of Asthma ... mechanism of action (MoA), route of administration (RoA) and ... and press releases. It also reviews key players involved ... on late-stage and discontinued projects. Complete report ...
Breaking Medicine Technology: