@article {1888, title = {Carbon export and cycling by the York, Tanana and Porcupine Rivers, Alaska, 2001-2005}, journal = {Water Resources Res.}, volume = {43}, year = {2007}, note = {id: 1162}, month = {2007}, author = {Striegl, R. G. and Dornblaser, M. M. and Aiken, G. R. and Wickland, K. P. and Raymond, P. A.} } @article {390, title = {Flux and age of dissolved organic carbon exported to the Arctic Ocean: A carbon isotopic study of the five largest arctic rivers RID C-4087-2009 RID C-5396-2008}, journal = {Global Biogeochemical Cycles}, volume = {21}, year = {2007}, note = {id: 2033; PT: J; UT: WOS:000250704000002}, pages = {GB4011-GB4011}, abstract = {The export and Delta C-14-age of dissolved organic carbon (DOC) was determined for the Yenisey, Lena, Ob{\textquoteright}, Mackenzie, and Yukon rivers for 2004 - 2005. Concentrations of DOC elevate significantly with increasing discharge in these rivers, causing approximately 60\% of the annual export to occur during a 2-month period following spring ice breakup. We present a total annual flux from the five rivers of similar to 16 teragrams (Tg), and conservatively estimate that the total input of DOC to the Arctic Ocean is 25 - 36 Tg, which is similar to 5-20\% greater than previous fluxes. These fluxes are also similar to 2.5 x greater than temperate rivers with similar watershed sizes and water discharge. Delta C-14-DOC shows a clear relationship with hydrology. A small pool of DOC slightly depleted in Delta C-14 is exported with base flow. The large pool exported with spring thaw is enriched in D14C with respect to current-day atmospheric Delta C-14-CO2 values. A simple model predicts that similar to 50\% of DOC exported during the arctic spring thaw is 1 - 5 years old, similar to 25\% is 6 - 10 years in age, and 15\% is 11 - 20 years old. The dominant spring melt period, a historically undersampled period, exports a large amount of young and presumably semilabile DOC to the Arctic Ocean.}, issn = {0886-6236}, doi = {10.1029/2007GB002934}, author = {Raymond, Peter A. and McClelland, J. W. and Holmes, R. M. and Zhulidov, A. V. and Mull, K. and Peterson, B. J. and Striegl, R. G. and Aiken, G. R. and Gurtovaya, T. Y.} } @article {1965, title = {A decrease in discharge-normalized DOC export by the Yukon River during summer through autumn}, journal = {Geophysical Research Letters}, volume = {32}, year = {2005}, note = {985cuTimes Cited:163 Cited References Count:28 }, month = {Nov 12}, abstract = {Climate warming is having a dramatic effect on the vegetation distribution and carbon cycling of terrestrial subarctic and arctic ecosystems. Here, we present hydrologic evidence that warming is also affecting the export of dissolved organic carbon and bicarbonate (DOC and HCO3-) at the large basin scale. In the 831,400 km(2) Yukon River basin, water discharge (Q) corrected DOC export significantly decreased during the growing season from 1978 - 80 to 2001 - 03, indicating a major shift in terrestrial to aquatic C transfer. We conclude that decreased DOC export, relative to total summer through autumn Q, results from increased flow path, residence time, and microbial mineralization of DOC in the soil active layer and groundwater. Counter to current predictions, we argue that continued warming could result in decreased DOC export to the Bering Sea and Arctic Ocean by major subarctic and arctic rivers, due to increased respiration of organic C on land.}, keywords = {alaska, arctic-ocean, climate-change, CO2, discontinuous permafrost, dissolved organic-carbon, flux, MATTER, tundra}, isbn = {0094-8276}, doi = {10.1029/2005GL024413}, url = {http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2\&SrcAuth=Alerting\&SrcApp=Alerting\&DestApp=WOS\&DestLinkType=FullRecord;UT=WOS:000233354500009}, author = {Striegl, R. G. and Aiken, G. R. and Dornblaser, M. M. and Raymond, P. A. and Wickland, K. P.} }