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CO2 outgassing from the Yellow River network and its implications for riverine carbon cycle

文献类型：期刊论文

作者Ran, Lishan1; Lu, Xi Xi1,2; Yang, Huan2; Li, Lingyu2; Yu, Ruihong2; Sun, Huiguo3; Han, Jingtai3
刊名JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
出版日期2015-07-01
卷号120期号:7页码:1334-1347
关键词CO2 outgassing riverine carbon cycle gas transfer carbon budget Yellow River
DOI10.1002/2015JG002982
文献子类Article
英文摘要CO2 outgassing across water-air interface is an important, but poorly quantified, component of riverine carbon cycle, largely because the data needed for flux calculations are spatially and temporally sparse. Based on compiled data sets measured throughout the Yellow River watershed and chamber measurements on the main stem, this study investigates CO2 evasion and assesses its implications for riverine carbon cycle. Fluxes of CO2 evasion present significant spatial and seasonal variations. High effluxes are estimated in regions with intense rock weathering or severe soil erosion that mobilizes organic carbon into the river network. By integrating seasonal changes of water surface area and gas transfer velocity (k), the CO2 efflux is estimated at 7.91.2TgCyr(-1) with a mean k of 42.116.9cmh(-1). Unlike in lake and estuarine environments where wind is the main generator of turbulence, k is more correlated with flow velocity changes. CO2 evasion in the Yellow River network constitutes an important pathway in its riverine carbon cycling. Analyzing the watershed-scale carbon budget indicates that 35% of the carbon exported into the Yellow River network from land is degassed during fluvial transport. The CO2 efflux is comparable to the carbon burial rate, while both larger than the fluvial export to the ocean. Comparing CO2 evasion with ecosystem productivity in the Yellow River watershed shows that its ecosystem carbon sink has previously been overestimated by >50%. Present efflux estimates are associated with uncertainty, and future work is needed to mechanistically understand CO2 evasion from the highly turbid waters.
WOS关键词GAS TRANSFER VELOCITIES ; QINGHAI-TIBET PLATEAU ; ORGANIC-CARBON ; PARTIAL-PRESSURE ; BOREAL LANDSCAPE ; AMAZONIAN RIVERS ; CHINESE RIVERS ; TURBID RIVERS ; INLAND WATERS ; FRESH-WATERS
WOS研究方向Environmental Sciences & Ecology ; Geology
语种英语
WOS记录号WOS:000359868200010
资助机构National University of Singapore(MOE2011-T2-1-101) ; National University of Singapore(MOE2011-T2-1-101) ; National Natural Science Foundation of China(41372371) ; National Natural Science Foundation of China(41372371) ; National University of Singapore(MOE2011-T2-1-101) ; National University of Singapore(MOE2011-T2-1-101) ; National Natural Science Foundation of China(41372371) ; National Natural Science Foundation of China(41372371)
源URL[http://ir.iggcas.ac.cn/handle/132A11/62278]  
专题地质与地球物理研究所_中国科学院新生代地质与环境重点实验室
作者单位1.Natl Univ Singapore, Dept Geog, Singapore 117548, Singapore
2.Inner Mongolia Univ, Coll Environm & Resources, Hohhot, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Ran, Lishan,Lu, Xi Xi,Yang, Huan,et al. CO2 outgassing from the Yellow River network and its implications for riverine carbon cycle[J]. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2015,120(7):1334-1347.
APA Ran, Lishan.,Lu, Xi Xi.,Yang, Huan.,Li, Lingyu.,Yu, Ruihong.,...&Han, Jingtai.(2015).CO2 outgassing from the Yellow River network and its implications for riverine carbon cycle.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,120(7),1334-1347.
MLA Ran, Lishan,et al."CO2 outgassing from the Yellow River network and its implications for riverine carbon cycle".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 120.7(2015):1334-1347.

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来源：地质与地球物理研究所

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