Lability of DOC transported by Alaskan rivers to the Arctic Ocean
Table S1: DOC concentrations in Alaskan arctic river waters after one month and three month incubations in the dark at 20°C with and without nutrients added. (18.05Kb)
Holmes, Robert M.
McClelland, James W.
Raymond, Peter A.
Frazer, Breton B.
Peterson, Bruce J.
MetadataShow full item record
Arctic rivers transport huge quantities of dissolved organic carbon (DOC) to the Arctic Ocean. The prevailing paradigm is that DOC in arctic rivers is refractory and therefore of little significance for the biogeochemistry of the Arctic Ocean. We show that there is substantial seasonal variability in the lability of DOC transported by Alaskan rivers to the Arctic Ocean: little DOC is lost during incubations of samples collected during summer, but substantial losses (20–40%) occur during incubations of samples collected during the spring freshet when the majority of the annual DOC flux occurs. We speculate that restricting sampling to summer may have biased past studies. If so, then fluvial 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 will be warranted.
Author Posting. © American Geophysical Union, 2008. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 35 (2008): L03402, doi:10.1029/2007GL032837.
Showing items related by title, author, creator and subject.
A land-to-ocean perspective on the magnitude, source and implication of DIC flux from major Arctic rivers to the Arctic Ocean Tank, Suzanne E.; Raymond, Peter A.; Striegl, Robert G.; McClelland, James W.; Holmes, Robert M.; Fiske, Gregory J.; Peterson, Bruce J. (American Geophysical Union, 2012-12-14)A series of seasonally distributed measurements from the six largest Arctic rivers (the Ob', Yenisey, Lena, Kolyma, Yukon and Mackenzie) was used to examine the magnitude and significance of Arctic riverine DIC flux to ...
Kicklighter, David W.; Hayes, Daniel J.; McClelland, James W.; Peterson, Bruce J.; McGuire, A. David; Melillo, Jerry M. (Ecological Society of America, 2013-12)Terrestrial carbon dynamics influence the contribution of dissolved organic carbon (DOC) to river networks in addition to hydrology. In this study, we use a biogeochemical process model to simulate the lateral transfer of ...
Seasonal and annual fluxes of nutrients and organic matter from large rivers to the Arctic Ocean and surrounding seas Holmes, Robert M.; McClelland, James W.; Peterson, Bruce J.; Tank, Suzanne E.; Bulygina, Ekaterina; Eglinton, Timothy I.; Gordeev, Viacheslav V.; Gurtovaya, Tatiana Y.; Raymond, Peter A.; Repeta, Daniel J.; Staples, Robin; Striegl, Robert G.; Zhulidov, Alexander V.; Zimov, Sergey A. (2011-03)River inputs of nutrients and organic matter impact the biogeochemistry of arctic estuaries and the Arctic Ocean as a whole, yet there is considerable uncertainty about the magnitude of fluvial fluxes at the pan-arctic ...