Please use this identifier to cite or link to this item: https://doi.org/10.1371/journal.pone.0178166
Title: Aged dissolved organic carbon exported from rivers of the Tibetan Plateau
Authors: Qu B. 
Sillanpää M.
Li C.
Kang S.
Stubbins A.
Yan F.
Aho K.S.
Zhou F.
Raymond P.A.
Keywords: carbon 14
organic carbon
river water
carbon
analytical parameters
Article
carbon cycle
concentration (parameters)
controlled study
dissolved organic carbon
geographic names
permafrost
radiation measurement
river
Tibetan Plateau
watershed
solubility
Tibet
Carbon
Carbon Radioisotopes
Rivers
Solubility
Tibet
Issue Date: 2017
Citation: Qu B., Sillanpää M., Li C., Kang S., Stubbins A., Yan F., Aho K.S., Zhou F., Raymond P.A. (2017). Aged dissolved organic carbon exported from rivers of the Tibetan Plateau. PLoS ONE 12 (5) : e0178166. ScholarBank@NUS Repository. https://doi.org/10.1371/journal.pone.0178166
Rights: Attribution 4.0 International
Abstract: The role played by river networks in regional and global carbon cycle is receiving increasing attention. Despite the potential of radiocarbon measurements (14C) to elucidate sources and cycling of different riverine carbon pools, there remain large regions such as the climate-sensitive Tibetan Plateau for which no data are available. Here we provide new 14C data on dissolved organic carbon (DOC) from three large Asian rivers (the Yellow, Yangtze and Yarlung Tsangpo Rivers) running on the Tibetan Plateau and present the carbon transportation pattern in rivers of the plateau versus other river system in the world. Despite higher discharge rates during the high flow season, the DOC yield of Tibetan Plateau rivers (0.41 gC m-2 yr-1) was lower than most other rivers due to lower concentrations. Radiocarbon ages of the DOC were older/more depleted (511±294 years before present, yr BP) in the Tibetan rivers than those in Arctic and tropical rivers. A positive correlation between radiocarbon age and permafrost watershed coverage was observed, indicating that 14Cdeplted/old carbon is exported from permafrost regions of the Tibetan Plateau during periods of high flow. This is in sharp contrast to permafrost regions of the Arctic which export 14C-enriched carbon during high discharge periods. © 2017 Qu et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Source Title: PLoS ONE
URI: https://scholarbank.nus.edu.sg/handle/10635/161193
ISSN: 19326203
DOI: 10.1371/journal.pone.0178166
Rights: Attribution 4.0 International
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This item is licensed under a Creative Commons License Creative Commons