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The sources and seasonal fluxes of particulate organic carbon in the Yellow River

文献类型：期刊论文

作者Qu, Yuanxin1,7; Jin, Zhangdong1,5,6; Wang, Jin1,6; Wang, Yunqiang1,5,6; Xiao, Jun1,6; Gou, Long-Fei1,7; Zhang, Fei1,6; Liu, Chun-Yao1,7; Gao, Yongli4; Suarez, Marina B.3
刊名EARTH SURFACE PROCESSES AND LANDFORMS
出版日期2020-04-02
页码16
关键词Chinese Loess Plateau the Yellow River particulate organic carbon annual fluxes radiocarbon
ISSN号0197-9337
DOI10.1002/esp.4861
通讯作者Jin, Zhangdong(zhdjin@ieecas.cn)
英文摘要The Yellow River transports a large amount of sediment and particulate organic carbon (POC), which is thought to mainly derive from erosion of the Chinese Loess Plateau (CLP). However, the compositions, sources and erosional fluxes of POC in the Yellow River remain poorly constrained. Here we combined measurements of mineralogy, total organic carbon content (OCtotal), stable organic carbon isotopes (delta C-13(org)), radiocarbon (C-14) activity of organic matter in bulk suspended sediments collected seasonally from the upper and middle Yellow River, to quantify the compositions and fluxes of the POC and to assess its sources (biospheric and petrogenic POC, i.e. POCbio and POCpetro, respectively). The results showed that the POC loading of sediments was controlled by mineralogy, grain size and specific surface area of loess particles. The F-mod of POC (0.71 to 0.31) can be explained by mixing of POCpetro with modern and aged POCbio. A binary mixing model based on the hyperbolic relationship of the F-mod and OCtotal revealed a wide range of ages of POCbio from 1300 to 11100 C-14 years. Relative to the upstream station, the annual POCbio and POCpetro fluxes in the Yellow River are more than doubled after it flows crossing the CLP within 35% drainage area gain, resulting in POCbio and POCpetro yields of the CLP at 3.50 +/- 0.59 and 0.48 +/- 0.49 tC/km(2)/yr, respectively. POC flux seasonal variation revealed that monsoon rainfall exerts a first-order control on the export of both POCbio and POCpetro from the CLP to the Yellow River, resulting in more than 90% of the annual POC exported during the monsoon season. Around one third of annual POC erosional flux was transported during a storm event period, highlighting the important role of extreme events in POC export in this large river. (c) 2020 John Wiley & Sons, Ltd.
WOS关键词CHINESE LOESS PLATEAU ; SOIL-EROSION CONTROL ; PAST 50 YEARS ; SEDIMENT LOAD ; SPATIOTEMPORAL VARIATIONS ; SUSPENDED SEDIMENT ; BIOSPHERIC CARBON ; CLIMATE-CHANGE ; LOWER REACHES ; TRANSPORT
资助项目Strategic Priority Research Program of Chinese Academy of Sciences[XDA20070102] ; NSFC Program[41773149]
WOS研究方向Physical Geography ; Geology
语种英语
WOS记录号WOS:000522778200001
出版者WILEY
资助机构Strategic Priority Research Program of Chinese Academy of Sciences ; NSFC Program
源URL[http://ir.ieecas.cn/handle/361006/12526]  
专题地球环境研究所_加速器质谱中心
第四纪科学与全球变化卓越创新中心
通讯作者Jin, Zhangdong
作者单位1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China
2.Univ Calif Irvine, Dept Earth Syst Sci, Irvine, CA USA
3.Univ Texas San Antonio, Dept Geol Sci, San Antonio, TX USA
4.Univ Texas San Antonio, Dept Geol Sci, Ctr Water Res, San Antonio, TX USA
5.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian, Peoples R China
6.CAS Ctr Excellence Quaternary Sci & Global Change, Xian, Peoples R China
7.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Qu, Yuanxin,Jin, Zhangdong,Wang, Jin,et al. The sources and seasonal fluxes of particulate organic carbon in the Yellow River[J]. EARTH SURFACE PROCESSES AND LANDFORMS,2020:16.
APA Qu, Yuanxin.,Jin, Zhangdong.,Wang, Jin.,Wang, Yunqiang.,Xiao, Jun.,...&Xu, Xiaomei.(2020).The sources and seasonal fluxes of particulate organic carbon in the Yellow River.EARTH SURFACE PROCESSES AND LANDFORMS,16.
MLA Qu, Yuanxin,et al."The sources and seasonal fluxes of particulate organic carbon in the Yellow River".EARTH SURFACE PROCESSES AND LANDFORMS (2020):16.

入库方式： OAI收割

来源：地球环境研究所

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