Spatial and seasonal variability of organic carbon transport in the Yellow River, China

doi:10.1016/j.jhydrol.2013.06.018

	Spatial and seasonal variability of organic carbon transport in the Yellow River, China
	Ran, Lishan 1; Lu, X. X.1,2; Sun, Huiguo 3; Han, Jingtai 3; Li, Ronghua 4; Zhang, Jianming 4
刊名	JOURNAL OF HYDROLOGY
	2013-08-19
卷号	498 页码:76-88
关键词	Dissolved organic carbon Particulate organic carbon Molar C/N ratio Spatial and seasonal variability Yellow River
ISSN号	0022-1694
DOI	10.1016/j.jhydrol.2013.06.018
文献子类	Article
英文摘要	In this study, we examined the spatial and seasonal variability in the concentrations of dissolved and particulate organic carbon (DOC and POC) of the Yellow River. Weekly samples of water and suspended solids were collected along the main stem channel between July 2011 and July 2012 for the upstream Toudaoguai and Tongguan stations, and between August 2008 and July 2012 for the downstream Lijin station near the river mouth. The DOC export at the upstream two stations was primarily controlled by hydrological events such as melting of ice and snow with high DOC concentrations occurring in spring. In contrast, it was more affected by human activities, mainly reservoir regulation, at the lowermost Lijin station. Lower DOC concentration in the wet season indicates that most of the leachable DOC in surface soils may have largely been flushed away by spring floods. In addition, it is also likely due to dilution effect of the rapidly increased water discharge. As a result of low organic carbon content in the parent soils, the Yellow River sediments were characterized by low POC content (POC%). The averaged POC% at Toudaoguai, Tongguan, and Lijin was 0.48%, 0.47%, and 0.37%, respectively, which is significantly lower than the global mean of around 0.95%. The POC% decreased exponentially with total suspended solids (TSS) concentration. This is likely due to the dilution of riverine POC, because high TSS generally means a higher proportion of coarse sediments that have more mineral matter. During the study period, the total DOC and POC fluxes into the ocean were estimated at 0.06 x 10(12) g/yr and 0.41 x 10(12) g/yr, respectively. Combining our previous estimate of dissolved inorganic carbon (DIC) export shows that the Yellow River transports a carbon flux of 1.52 x 10(12) g/yr into the Bohai Sea, accounting for about 0.19% of the global total riverine carbon flux (DOC + POC + DIC). The extremely low DOC/POC ratio represents the lowest level among major world rivers, which is consistent with its intense soil erosion and highlights the effect of soil erosion on organic carbon export. (C) 2013 Elsevier B.V. All rights reserved.
WOS关键词	CLIMATE-CHANGE ; LOESS PLATEAU ; SEDIMENT LOAD ; CONTINENTAL EROSION ; CO2 CONSUMPTION ; TURBID RIVERS ; XIJIANG RIVER ; FLUXES ; MATTER ; IMPACTS
WOS研究方向	Engineering ; Geology ; Water Resources
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000323688800007
资助机构	National University of Singapore(MOE2011-T2-1-101) ; National University of Singapore(MOE2011-T2-1-101) ; National University of Singapore(MOE2011-T2-1-101) ; National University of Singapore(MOE2011-T2-1-101) ; National University of Singapore(MOE2011-T2-1-101) ; National University of Singapore(MOE2011-T2-1-101) ; National University of Singapore(MOE2011-T2-1-101) ; National University of Singapore(MOE2011-T2-1-101)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/87784]
专题	中国科学院地质与地球物理研究所
通讯作者	Ran, Lishan
作者单位	1.Natl Univ Singapore, Dept Geog, Singapore 117570, Singapore 2.Inner Mongolia Univ, Coll Environm & Resources, Hohhot 010021, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 4.Yellow River Conservancy Commiss, Lijin Hydrol Gauge Stn, Lijin 257400, Peoples R China
推荐引用方式 GB/T 7714	Ran, Lishan,Lu, X. X.,Sun, Huiguo,et al. Spatial and seasonal variability of organic carbon transport in the Yellow River, China[J]. JOURNAL OF HYDROLOGY,2013,498:76-88.
APA	Ran, Lishan,Lu, X. X.,Sun, Huiguo,Han, Jingtai,Li, Ronghua,&Zhang, Jianming.(2013).Spatial and seasonal variability of organic carbon transport in the Yellow River, China.JOURNAL OF HYDROLOGY,498,76-88.
MLA	Ran, Lishan,et al."Spatial and seasonal variability of organic carbon transport in the Yellow River, China".JOURNAL OF HYDROLOGY 498(2013):76-88.