三峡水库夏季干流、支流(草堂河)水体的二氧化碳分压及扩散通量

doi:10.3969/j.issn.1007-2861.2015.01.010

Abstract

Abstract: From May 2013 to July 2013, monthly cruise investigation was conducted to study the partial pressure of dissolved carbon dioxide (pCO₂) in the main stream of the Three Gorge Reservoir and its tributary, the Caotang River. The results show that pCO₂ in the surface water of the Caotang River varied from 15.8 to 226.4 Pa, and 198.8 to 261.1 Pa for the main stream of the Three Gorge Reservoir. Along the water column of the Caotang River, the lowest value of pCO₂ in surface water was 15.8 Pa, and increased rapidly with the depth, and kept stable below 5 m with a maximum value of 294.2 Pa. According to calculations, emission fluxes of CO₂ in the Caotang River in the period of investigation were about 16.46, 4.91 and 30.85 mmol m⁻²·d⁻¹, respectively. In the main stream of the
Three Gorge Reservoir, this flux was 48.54 mmol·m⁻2·d^−1. The results show that the main stream of the Three Gorge Reservoir is a source for atmospheric CO₂, and the tributary Caotang River emits less CO₂ than the main stream, even a sink for atmospheric CO₂on June.

Key words: diffusion flux of carbon dioxide, greenhouse gas, partial pressure of carbon dioxide, the Caotang River, the Three Gorge Reservoir

CLC Number:

X 142

WU Xue-Qian, CAO Man, FU Jia-Nan, WEI Hao-Bin, JIA Xiao-Bin, DENG Bing, WANG Fu-Shun. Partial pressure and diffusion flux of dissolved carbon dioxide in the main stream of the Three Gorge Reservoir and the Caotang River in summer[J]. Journal of Shanghai University（Natural Science Edition）, 2015, 21(03): 311-318.

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Partial pressure and diffusion flux of dissolved carbon dioxide in the main stream of the Three Gorge Reservoir and the Caotang River in summer

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