DOI: 10.1016/j.atmosenv.2014.12.042
Scopus记录号: 2-s2.0-84918789937
论文题名: Seasonal variation of CO2 diffusion flux from a large subtropical reservoir in East China
作者: Wang F ; , Cao M ; , Wang B ; , Fu J ; , Luo W ; , Ma J
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 103 起始页码: 129
结束页码: 137
语种: 英语
英文关键词: CO2 diffusion flux
; Seasonal patterns
; Subtropical reservoir
; The xinanjiang reservoir
Scopus关键词: Carbon dioxide
; Diffusion
; Rivers
; Turbines
; Continuous measurements
; Diffusion fluxes
; Infrared systems
; Mean water depth
; Partial pressure of co
; Reservoir systems
; Seasonal patterns
; Seasonal variation
; Reservoirs (water)
; carbon dioxide
; surface water
; water
; Article
; atmosphere
; China
; diffusion
; mass
; measurement
; pressure
; river
; season
; seasonal variation
; air pollution
; air temperature
; atmospheric diffusion
; carbon dioxide tension
; cold
; high temperature
; photosynthesis
; water temperature
; water vapor
; carbon dioxide
; carbon emission
; carbon flux
; diffusion
; reservoir
; seasonal variation
; subtropical region
; water column
; water depth
; China
; Xinanjiang Reservoir
; Zhejiang
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: The Xinanjiang Reservoir (E118°42'-E118°59', N29°28'-N29°58'), has a surface area of 567km2, with a mean water depth of 34m, and is in an oligotrophic state at present. In this study, five cruises were carried out in April, June, August and November 2010, and January 2011, to understand the seasonal variation of CO2 emission and to estimate the annual diffusion flux of CO2 from this reservoir. The partial pressure of CO2 (pCO2) in surface water was determined using a continuous measurement system (equilibrator-infrared system) from upstream to central reservoir, and pCO2 along the water column in central reservoir and in downstream of the dam was also determined. Results showed that pCO2 in reservoir surface water varied significantly in different seasons, ranging from 5μatm in August to 1700μatm in January; while in downstream of the dam, it ranged from 1400μatm in April to 3800μatm in August. Along the water column in central reservoir, pCO2 also showed significantly variations seasonally, and a water mass with quite high pCO2 (>4000μatm) formed below water depth of 20m in warm seasons. The highest diffusion flux of CO2 (F-CO2) appeared in January, with values of 20.9mmolm-2d-1 at river reach and 25.2mmolm-2d-1 at central reservoir, while the lowest values of F-CO2 were-10.0 at river reach and-10.8mmolm-2d-1 at central reservoir in August. Downstream of the dam had quite high positive F-CO2 during the whole year, with a range of 129.1 in April to 381.5mmolm-2 d-1 in August. In total, about 88.9ktona-1 CO2 was emitted to the atmosphere from the Xinanjiang Reservoir surface, while 39% of it (35.1ktona-1) was absorbed by surface water in warm seasons. Downstream and turbine had a comparable CO2 outgas flux of 61.5ktona-1. When taking the whole reservoir surface, turbine and downstream into account, the Xinanjiang Reservoir system had a net CO2 emission flux of 115.3ktona-1. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82004
Appears in Collections: 气候变化事实与影响
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作者单位: School of Environmental and Chemical Engineering, Shanghai University, Shanghai, China; State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, China
Recommended Citation:
Wang F,, Cao M,, Wang B,et al. Seasonal variation of CO2 diffusion flux from a large subtropical reservoir in East China[J]. Atmospheric Environment,2015-01-01,103