气候变化领域集成服务门户(CCPortal): Export of dissolved carbonaceous and nitrogenous substances in rivers of the Water Tower of Asia

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DOI	10.1016/j.jes.2017.04.001
	Export of dissolved carbonaceous and nitrogenous substances in rivers of the Water Tower of Asia
	Qu, Bin; Sillanpaa, Mika; Kang, Shichang; Yan, Fangping; Li, Zhiguo; Zhang, Hongbo; Li, Chaoliu
通讯作者	Qu, B (通讯作者)
发表日期	2018
ISSN	1001-0742
EISSN	1878-7320
起始页码	53
结束页码	61
卷号	65
英文摘要	Rivers are critical links in the carbon and nitrogen cycle in aquatic, terrestrial, and atmospheric environments. Here riverine carbon and nitrogen exports in nine large rivers on the Tibetan Plateau - the Water Tower of Asia - were investigated in the monsoon season from 2013 to 2015. Compared with the world average, concentrations of dissolved inorganic carbon (DIC, 30.7 mg/L) were high in river basins of the plateau due to extensive topographic relief and intensive water erosion. Low concentrations of dissolved organic carbon (DOC, 1.16 mg/L) were likely due to the low temperature and unproductive land vegetation environments. Average concentrations of riverine DIN (0.32 mg/L) and DON (0.35 mg/L) on the Tibetan Plateau were close to the world average. However, despite its predominantly pristine environment, discharge from agricultural activities and urban areas of the plateau has raised riverine N export. In addition, DOC/DON ratio (C/N, similar to 6.5) in rivers of the Tibetan Plateau was much lower than the global average, indicating that dissolved organic carbon in the rivers of this region might be more bioavailable. Therefore, along with global warming and anthropogenic activities, increasing export of bioavailable riverine carbon and nitrogen from rivers of the Tibetan Plateau can be expected in the future, which will possibly influence the regional carbon and nitrogen cycle. (C) 2017 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
关键词	QINGHAI-TIBET PLATEAU ORGANIC-CARBON INORGANIC NITROGEN CLIMATE-CHANGE YANGTZE-RIVER PHOSPHORUS GLACIER DYNAMICS IMPACTS MATTER
英文关键词	Dissolved carbon; Dissolved nitrogen; Rivers; The Tibetan Plateau
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:000427600600006
来源期刊	JOURNAL OF ENVIRONMENTAL SCIENCES
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259215
推荐引用方式 GB/T 7714	Qu, Bin,Sillanpaa, Mika,Kang, Shichang,et al. Export of dissolved carbonaceous and nitrogenous substances in rivers of the Water Tower of Asia[J]. 中国科学院青藏高原研究所,2018,65.
APA	Qu, Bin.,Sillanpaa, Mika.,Kang, Shichang.,Yan, Fangping.,Li, Zhiguo.,...&Li, Chaoliu.(2018).Export of dissolved carbonaceous and nitrogenous substances in rivers of the Water Tower of Asia.JOURNAL OF ENVIRONMENTAL SCIENCES,65.
MLA	Qu, Bin,et al."Export of dissolved carbonaceous and nitrogenous substances in rivers of the Water Tower of Asia".JOURNAL OF ENVIRONMENTAL SCIENCES 65(2018).