Export of Dissolved Organic Carbon from the Source Region of Yangtze River in the Tibetan Plateau

The carbon release and transport in rivers are expected to increase in a warming climate with enhanced melting. We present a continuous dataset of DOC in the river, precipitation, and groundwater, including air temperature, discharge, and precipitation in the source region of the Yangtze River (SRYR...

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Published in:Sustainability
Main Authors: Xiaoni You, Xiangying Li, Mika Sillanpää, Rong Wang, Chengyong Wu, Qiangqiang Xu
Format: Article in Journal/Newspaper
Language:English
Published: MDPI AG 2022
Subjects:
DOC
Online Access:https://doi.org/10.3390/su14042441
https://doaj.org/article/30992eac31db4656b85dd9700fbe231c
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spelling ftdoajarticles:oai:doaj.org/article:30992eac31db4656b85dd9700fbe231c 2023-05-15T17:58:10+02:00 Export of Dissolved Organic Carbon from the Source Region of Yangtze River in the Tibetan Plateau Xiaoni You Xiangying Li Mika Sillanpää Rong Wang Chengyong Wu Qiangqiang Xu 2022-02-01T00:00:00Z https://doi.org/10.3390/su14042441 https://doaj.org/article/30992eac31db4656b85dd9700fbe231c EN eng MDPI AG https://www.mdpi.com/2071-1050/14/4/2441 https://doaj.org/toc/2071-1050 doi:10.3390/su14042441 2071-1050 https://doaj.org/article/30992eac31db4656b85dd9700fbe231c Sustainability, Vol 14, Iss 2441, p 2441 (2022) DOC groundwater precipitation river water Yangtze River Environmental effects of industries and plants TD194-195 Renewable energy sources TJ807-830 Environmental sciences GE1-350 article 2022 ftdoajarticles https://doi.org/10.3390/su14042441 2022-12-31T15:47:34Z The carbon release and transport in rivers are expected to increase in a warming climate with enhanced melting. We present a continuous dataset of DOC in the river, precipitation, and groundwater, including air temperature, discharge, and precipitation in the source region of the Yangtze River (SRYR). Our study shows that the average concentrations of DOC in the three end-members are characterized as the sequence of groundwater > precipitation > river, which is related to the water volume, cycle period, and river flow speed. The seasonality of DOC in the river is observed as the obvious bimodal structure at Tuotuohe (TTH) and Zhimenda (ZMD) gauging stations. The highest concentration appears in July (2.4 mg L −1 at TTH and 2.1 mg L −1 at ZMD) and the secondary high value (2.2 mg L −1 at TTH 1.9 mg L −1 at ZMD) emerges from August to September. It is estimated that 459 and 6751 tons of DOC are transported by the river at TTH and ZMD, respectively. Although the wet deposition flux of DOC is nearly ten times higher than the river flux, riverine DOC still primarily originates from soil erosion of the basin rather than precipitation settlement. Riverine DOC fluxes are positively correlated with discharge, suggesting DOC fluxes are likely to increase in the future. Our findings highlight that permafrost degradation and glacier retreat have a great effect on DOC concentration in rivers and may become increasingly important for regional biogeochemical cycles. Article in Journal/Newspaper permafrost Directory of Open Access Journals: DOAJ Articles Sustainability 14 4 2441
institution Open Polar
collection Directory of Open Access Journals: DOAJ Articles
op_collection_id ftdoajarticles
language English
topic DOC
groundwater
precipitation
river water
Yangtze River
Environmental effects of industries and plants
TD194-195
Renewable energy sources
TJ807-830
Environmental sciences
GE1-350
spellingShingle DOC
groundwater
precipitation
river water
Yangtze River
Environmental effects of industries and plants
TD194-195
Renewable energy sources
TJ807-830
Environmental sciences
GE1-350
Xiaoni You
Xiangying Li
Mika Sillanpää
Rong Wang
Chengyong Wu
Qiangqiang Xu
Export of Dissolved Organic Carbon from the Source Region of Yangtze River in the Tibetan Plateau
topic_facet DOC
groundwater
precipitation
river water
Yangtze River
Environmental effects of industries and plants
TD194-195
Renewable energy sources
TJ807-830
Environmental sciences
GE1-350
description The carbon release and transport in rivers are expected to increase in a warming climate with enhanced melting. We present a continuous dataset of DOC in the river, precipitation, and groundwater, including air temperature, discharge, and precipitation in the source region of the Yangtze River (SRYR). Our study shows that the average concentrations of DOC in the three end-members are characterized as the sequence of groundwater > precipitation > river, which is related to the water volume, cycle period, and river flow speed. The seasonality of DOC in the river is observed as the obvious bimodal structure at Tuotuohe (TTH) and Zhimenda (ZMD) gauging stations. The highest concentration appears in July (2.4 mg L −1 at TTH and 2.1 mg L −1 at ZMD) and the secondary high value (2.2 mg L −1 at TTH 1.9 mg L −1 at ZMD) emerges from August to September. It is estimated that 459 and 6751 tons of DOC are transported by the river at TTH and ZMD, respectively. Although the wet deposition flux of DOC is nearly ten times higher than the river flux, riverine DOC still primarily originates from soil erosion of the basin rather than precipitation settlement. Riverine DOC fluxes are positively correlated with discharge, suggesting DOC fluxes are likely to increase in the future. Our findings highlight that permafrost degradation and glacier retreat have a great effect on DOC concentration in rivers and may become increasingly important for regional biogeochemical cycles.
format Article in Journal/Newspaper
author Xiaoni You
Xiangying Li
Mika Sillanpää
Rong Wang
Chengyong Wu
Qiangqiang Xu
author_facet Xiaoni You
Xiangying Li
Mika Sillanpää
Rong Wang
Chengyong Wu
Qiangqiang Xu
author_sort Xiaoni You
title Export of Dissolved Organic Carbon from the Source Region of Yangtze River in the Tibetan Plateau
title_short Export of Dissolved Organic Carbon from the Source Region of Yangtze River in the Tibetan Plateau
title_full Export of Dissolved Organic Carbon from the Source Region of Yangtze River in the Tibetan Plateau
title_fullStr Export of Dissolved Organic Carbon from the Source Region of Yangtze River in the Tibetan Plateau
title_full_unstemmed Export of Dissolved Organic Carbon from the Source Region of Yangtze River in the Tibetan Plateau
title_sort export of dissolved organic carbon from the source region of yangtze river in the tibetan plateau
publisher MDPI AG
publishDate 2022
url https://doi.org/10.3390/su14042441
https://doaj.org/article/30992eac31db4656b85dd9700fbe231c
genre permafrost
genre_facet permafrost
op_source Sustainability, Vol 14, Iss 2441, p 2441 (2022)
op_relation https://www.mdpi.com/2071-1050/14/4/2441
https://doaj.org/toc/2071-1050
doi:10.3390/su14042441
2071-1050
https://doaj.org/article/30992eac31db4656b85dd9700fbe231c
op_doi https://doi.org/10.3390/su14042441
container_title Sustainability
container_volume 14
container_issue 4
container_start_page 2441
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