Aged dissolved organic carbon exported from rivers of the Tibetan Plateau
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 Plate...
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ftpubmed:oai:pubmedcentral.nih.gov:5446113 2023-05-15T14:57:50+02:00 Aged dissolved organic carbon exported from rivers of the Tibetan Plateau Qu, Bin Sillanpää, Mika Li, Chaoliu Kang, Shichang Stubbins, Aron Yan, Fangping Aho, Kelly Sue Zhou, Feng Raymond, Peter A. 2017-05-26 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5446113/ http://www.ncbi.nlm.nih.gov/pubmed/28552976 https://doi.org/10.1371/journal.pone.0178166 en eng Public Library of Science http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5446113/ http://www.ncbi.nlm.nih.gov/pubmed/28552976 http://dx.doi.org/10.1371/journal.pone.0178166 © 2017 Qu et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. CC-BY Research Article Text 2017 ftpubmed https://doi.org/10.1371/journal.pone.0178166 2017-06-18T00:03:22Z 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 14C-deplted/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. Text Arctic permafrost PubMed Central (PMC) Arctic PLOS ONE 12 5 e0178166 |
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Research Article Qu, Bin Sillanpää, Mika Li, Chaoliu Kang, Shichang Stubbins, Aron Yan, Fangping Aho, Kelly Sue Zhou, Feng Raymond, Peter A. Aged dissolved organic carbon exported from rivers of the Tibetan Plateau |
topic_facet |
Research Article |
description |
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 14C-deplted/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. |
format |
Text |
author |
Qu, Bin Sillanpää, Mika Li, Chaoliu Kang, Shichang Stubbins, Aron Yan, Fangping Aho, Kelly Sue Zhou, Feng Raymond, Peter A. |
author_facet |
Qu, Bin Sillanpää, Mika Li, Chaoliu Kang, Shichang Stubbins, Aron Yan, Fangping Aho, Kelly Sue Zhou, Feng Raymond, Peter A. |
author_sort |
Qu, Bin |
title |
Aged dissolved organic carbon exported from rivers of the Tibetan Plateau |
title_short |
Aged dissolved organic carbon exported from rivers of the Tibetan Plateau |
title_full |
Aged dissolved organic carbon exported from rivers of the Tibetan Plateau |
title_fullStr |
Aged dissolved organic carbon exported from rivers of the Tibetan Plateau |
title_full_unstemmed |
Aged dissolved organic carbon exported from rivers of the Tibetan Plateau |
title_sort |
aged dissolved organic carbon exported from rivers of the tibetan plateau |
publisher |
Public Library of Science |
publishDate |
2017 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5446113/ http://www.ncbi.nlm.nih.gov/pubmed/28552976 https://doi.org/10.1371/journal.pone.0178166 |
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Arctic |
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Arctic |
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Arctic permafrost |
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Arctic permafrost |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5446113/ http://www.ncbi.nlm.nih.gov/pubmed/28552976 http://dx.doi.org/10.1371/journal.pone.0178166 |
op_rights |
© 2017 Qu et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
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CC-BY |
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https://doi.org/10.1371/journal.pone.0178166 |
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PLOS ONE |
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12 |
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5 |
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e0178166 |
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