Navigation Links
Scientists expand understanding of how river carbon impacts the Arctic Ocean
Date:2/12/2008

Arctic rivers transport huge quantities of dissolved organic carbon (DOC) to the Arctic Ocean. The prevailing paradigm regarding DOC in arctic rivers is that it is largely refractory, making it of little significance for the biogeochemistry of the Arctic Ocean. However, a recent study by R. M. Holmes of the Woods Hole Research Center and colleagues at collaborating institutions challenges that assumption by showing that DOC in Alaskan arctic rivers is remarkably labile during the spring flood period when the majority of annual DOC flux occurs. The research was published February 9 in Geophysical Research Letters.

According to Dr. Holmes, Though only about 1% of global ocean volume, the Arctic Ocean receives almost 10% of global river discharge. As a consequence, organic carbon transported by arctic rivers has the potential to strongly impact the chemistry and biology of the Arctic Ocean.

The primary focus of the paper is the lability of dissolved organic carbon in Alaskan arctic rivers, or how available the DOC is for microbial decomposition. Because of logistical challenges, past studies have focused almost exclusively on the summer low-flow period, when numerous studies have shown arctic river DOC to be refractory. However, by timing their sampling to include the high-flow period just after the spring ice break, the authors found that much of the DOC discharged by Alaskan rivers to the Arctic Ocean is labile. Consequently, riverine inputs of DOC to the Arctic Ocean may have a much larger influence on coastal ocean biogeochemistry than previously realized, and reconsideration of the role of terrigenous DOC on carbon, microbial, and food-web dynamics on the arctic shelf is warranted.

Holmes says, Though tantalizing evidence has been emerging in recent years, this study was the first to directly show that dissolved organic carbon in rivers during the spring flood period is highly labile.

Rivers sampled for this project
'/>"/>

Contact: Elizabeth Braun
ebraun@whrc.org
508-540-9900
Woods Hole Research Center
Source:Eurekalert  

Page: 1 2

Related biology news :

1. UK scientists working to help cut ID theft
2. Scientists show that mitochondrial DNA variants are linked to risk factors for type 2 diabetes
3. Comet probes reveal evidence of origin of life, scientists claim
4. Scientists link fragile X tremor/ataxia syndrome to binding protein in RNA
5. Male elephants get photo IDs from scientists
6. Scientists retrace evolution with first atomic structure of an ancient protein
7. Muscle mass: Scientists identify novel mode of transcriptional regulation during myogenesis
8. Carnegie Mellon scientists develop nanogels that enable controlled delivery of carbohydrate drugs
9. Clemson scientists shed light on molecules in living cells
10. Scientists tackle mystery mountain illness
11. T. rex quicker than Becks, say scientists
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Scientists expand understanding of how river carbon impacts the Arctic Ocean
(Date:9/15/2014)... teeming with life it,s not what comes to mind ... time evidence of Doncaster,s 310-million-year-old past, including a fossilised shark ... , Some of the fossilised plants and creatures may even ... case, several horseshoe crabs and some previously unrecorded seed pods ... rocks that formed within the coal and shale deposits in ...
(Date:9/15/2014)... Amid conflicting reports about the need for vitamin ... published today suggests that adequate levels of this essential ... elderly, and women who are or may become pregnant. ... also important, researchers said, but often complicated by the ... difficult to obtain through diet alone. It has been ...
(Date:9/12/2014)... September 12, 2014 ... the addition of the  "Global Facial Recognition ... and Facial Analytics) - Industry Analysis, Size, ... 2020"  report to their offering. ... facial recognition market was valued at USD ...
Breaking Biology News(10 mins):'Jaws' lived in Doncaster 2Vitamin E intake critical during 'the first 1,000 days' 2Vitamin E intake critical during 'the first 1,000 days' 3Global Facial Recognition Market (2D Facial Recognition, 3D Facial Recognition, and Facial Analytics) - Trends and Forecast to 2020 2Global Facial Recognition Market (2D Facial Recognition, 3D Facial Recognition, and Facial Analytics) - Trends and Forecast to 2020 3
... As governments prepare to gather at the United ... and 20, a new report published by a group ... evidence that a combined approach to tackling poverty and ... education, and nutrition/food securityachieves better results for the world,s ...
... which extends to include the formal scientific naming of all ... in the procedure scientists need to follow when they describe ... ,International Code of Nomenclature for algae, fungi and plants, are ... article published in BioMed Central,s open access journal BMC ...
... for Research on Aging (Novato, CA) and Biotica Technology ... investigate polyketides in diseases of aging. Building on observations ... & Kennedy; Nature 2009), the collaborators will ... range of age-related disease models to identify novel therapeutics. ...
Cached Biology News:Report showcases success of integrated development approaches 2Report showcases success of integrated development approaches 3Bringing botany into the 21st Century 2Buck Institute and Biotica to investigate polyketides in extension of healthy lifespan 2
(Date:9/16/2014)... RENU 28, the world's first and only skin ... purchase in Australia and New Zealand in mid-August . , ... The tour will make stops in Brisbane on September 16, ... Sydney on the 20th, and Melbourne on the 22nd. , ... and to educate people about the new product and business ...
(Date:9/15/2014)... Sept. 15, 2014   Global Science & ... scientific products and services for satellite and weather ... for Integrated Services (OASIS) from the General Services ... selected to provide the government best-value solutions for ... (SB) category in Pool 4. The OASIS SB ...
(Date:9/15/2014)... Sept. 15, 2014 EnGeneIC, Ltd. ... the treatment of cancer through the targeted delivery ... that, together with the Asbestos Disease Research Institute ... New South Wales (NSW) Premier,s Award for Excellence ... are the hospitals that will be involved in ...
(Date:9/15/2014)... have developed a technique for controlling the surface tension ... the door to a new generation of reconfigurable electronic ... the fact that the oxide "skin" of the metal ... as a surfactant, lowering the surface tension between the ... a liquid metal alloy of gallium and indium. In ...
Breaking Biology Technology:Global Wellness Company Hosts ASEA Australia Tour September 16-22 2Global Science & Technology, Inc. Awarded GSA OASIS Small Business Contract 2Global Science & Technology, Inc. Awarded GSA OASIS Small Business Contract 3EnGeneIC Named a Recipient of the Cancer Institute NSW Premier's Award for Excellence in Translational Cancer Research 2EnGeneIC Named a Recipient of the Cancer Institute NSW Premier's Award for Excellence in Translational Cancer Research 3Researchers control surface tension to manipulate liquid metals 2
... organizations see security and compliance as their top issues, they ... There is a big secret that few executives know about ... issue. It goes beyond knowing virus scans and firewalls. Security ... strategy and not a low-level function. , ,In several semesters ...
... trend away from IPOs and the progress of six regional ... Fund I annual meeting, held at the Wisconsin Athletic Club. ... Mason Wells met in Milwaukee to hear a speech ... Association , and listen to updates from six firms that ...
... Bone Care International Inc. announced on Wednesday that the ... ,Genzyme and Bone Care have signed a definitive agreement for ... transaction valued at $33.00 per fully diluted share. ... Care's shareholders at a meeting on June 30, and other ...
Cached Biology Technology:To find solid security candidates, look beyond tech certificates 2To find solid security candidates, look beyond tech certificates 3To find solid security candidates, look beyond tech certificates 4VC trends, company progress discussed at Mason Wells portfolio meeting 2VC trends, company progress discussed at Mason Wells portfolio meeting 3VC trends, company progress discussed at Mason Wells portfolio meeting 4