Publication Date:
2014-08-26
Description:
Carbon in thawing permafrost soils may have global impacts on climate change; however, the factors that control its processing and fate are poorly understood. The dominant fate of dissolved organic carbon (DOC) released from soils to inland waters is either complete oxidation to CO2 or partial oxidation and river export to oceans. Although both processes are most often attributed to bacterial respiration, we found that photochemical oxidation exceeds rates of respiration and accounts for 70 to 95% of total DOC processed in the water column of arctic lakes and rivers. At the basin scale, photochemical processing of DOC is about one-third of the total CO2 released from surface waters and is thus an important component of the arctic carbon budget.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cory, Rose M -- Ward, Collin P -- Crump, Byron C -- Kling, George W -- New York, N.Y. -- Science. 2014 Aug 22;345(6199):925-8. doi: 10.1126/science.1253119.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Earth and Environmental Sciences, University of Michigan, Ann Arbor, MI 48109, USA. rmcory@umich.edu. ; Earth and Environmental Sciences, University of Michigan, Ann Arbor, MI 48109, USA. ; Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, OR 97331, USA. ; Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, MI 48109, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25146289" target="_blank"〉PubMed〈/a〉
Keywords:
Arctic Regions
;
Carbon/*chemistry
;
*Carbon Cycle
;
Carbon Dioxide/chemistry
;
Fresh Water/*chemistry
;
Geologic Sediments/chemistry
;
Photochemical Processes
;
Soil
;
*Sunlight
;
Wetlands
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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