A Synthetic Model to Quantify Dissolved Organic Carbon Transport in the Changjiang River System: Model Structure and Spatiotemporal Patterns

doi:10.1029/2019MS001648

	A Synthetic Model to Quantify Dissolved Organic Carbon Transport in the Changjiang River System: Model Structure and Spatiotemporal Patterns
	Lv, Shucong 1,2; Yu, Qibiao 1; Wang, Fang 1; Wang, Yuchun 3; Yan, Weijin 1; Li, Yanqiang 1
刊名	JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
	2019-09-13
页码	18
关键词	dissolved organic carbon riverine transport in-river removal spatiotemporal patterns Changjiang River Network
DOI	10.1029/2019MS001648
通讯作者	Yan, Weijin(yanwj@igsnrr.ac.cn)
英文摘要	Riverine dissolved organic carbon (DOC) is an important carbon pool in the global biogeochemical cycle. DOC transport in river networks involves three processes: DOC input (including DOC release from terrestrial ecosystems and in situ production in river networks), in-river removal, and export through watershed outlets or estuaries. DOC transport in large river networks is gaining attention due to its important role in carbon and nutrient supply and CO2 emission, for example. However, quantifying DOC input to rivers and in-river removal is still not properly understood. This study developed a synthesis model to quantify DOC transport in the Changjiang River Network (CRN) by coupling spiraling theory with Strahler river order. Our study suggested that the wetlands proportion and soil organic matter are valid parameters in a DOC model and our simulations showed that approximately 2.65-4.86 Tg C/year entered rivers and 1.16-2.12 Tg C/year was exported to the estuary as DOC, with a removal proportion of over 50% throughout the CRN in 1980-2015. The subbasins of the Dongting Lake, the Yichang-Jiujiang section of the mainstream, and the Min-Tuo River were primary contributors of DOC load, accounting for approximately 45% of the bulk DOC load of the CRN. The subbasins of Jinsha River and Yalong River in the upper reaches of the CRN and the subbasin of Wu River contributed less than 10% of the DOC load. DOC export by the CRN accounted for 0.3-1.2% of the global DOC flux from land to sea.
资助项目	National Key Research and Development Program of China[2016YFA0601004] ; National Key Research and Development Program of China[2016YFA0602704] ; National Natural Science Foundation of China[91647208] ; National Natural Science Foundation of China[U1802241]
WOS关键词	AGRICULTURAL LAND-USE ; YANGTZE-RIVER ; MISSISSIPPI RIVER ; NOVA-SCOTIA ; DOC FLUX ; NITROGEN ; MATTER ; STREAM ; EXPORT ; CATCHMENTS
WOS研究方向	Meteorology & Atmospheric Sciences
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000486730100001
资助机构	National Key Research and Development Program of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/69523]
专题	中国科学院地理科学与资源研究所
通讯作者	Yan, Weijin
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China 3.China Inst Water Resources & Hydropower Res, State Key Lab Simulat & Regulat Water Cycle Rive, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Lv, Shucong,Yu, Qibiao,Wang, Fang,et al. A Synthetic Model to Quantify Dissolved Organic Carbon Transport in the Changjiang River System: Model Structure and Spatiotemporal Patterns[J]. JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS,2019:18.
APA	Lv, Shucong,Yu, Qibiao,Wang, Fang,Wang, Yuchun,Yan, Weijin,&Li, Yanqiang.(2019).A Synthetic Model to Quantify Dissolved Organic Carbon Transport in the Changjiang River System: Model Structure and Spatiotemporal Patterns.JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS,18.
MLA	Lv, Shucong,et al."A Synthetic Model to Quantify Dissolved Organic Carbon Transport in the Changjiang River System: Model Structure and Spatiotemporal Patterns".JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS (2019):18.