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

上海大学学报(自然科学版) ›› 2015, Vol. 21 ›› Issue (03): 311-318.doi: 10.3969/j.issn.1007-2861.2015.01.010

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

吴学谦¹, 操满¹, 傅家楠¹, 魏浩斌¹, 贾晓斌¹, 邓兵², 汪福顺¹

1. 上海大学环境与化学工程学院, 上海200444;2. 华东师范大学河口海岸学国家重点实验室, 上海200062

收稿日期:2015-05-20 出版日期:2015-06-22 发布日期:2015-06-22
通讯作者: 汪福顺(1976—), 男, 教授, 博士生导师, 博士, 研究方向为地球化学. E-mail: fswang@shu.edu.cn. E-mail:fswang@shu.edu.cn.
基金资助:
国家水体污染控制与治理科技重大专项(2012ZX07104-001); 国家自然科学基金资助项目(41273128,41473082)

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

WU Xue-qian¹, CAO Man¹, FU Jia-nan¹, WEI Hao-bin¹, JIA Xiao-bin¹,DENG Bing², WANG Fu-shun¹

1. School of Environmental and Chemical Engineering, Shanghai University,Shanghai 200444, China;2. State Key Laboratory of Estuarine and Coastal Research, East China Normal University,Shanghai 200062,China

Received:2015-05-20 Online:2015-06-22 Published:2015-06-22

摘要/Abstract

摘要： 2013年5—7月对三峡水库库区干流及支流草堂河水体CO₂分压(pCO₂ )进行走航观测. 结果表明: 夏季草堂河表层pCO₂ 为15.8226.4 Pa, 三峡水库库区干流表层pCO₂为198.8261.1 Pa. 对支流草堂河剖面监测发现, 表层pCO₂最低为15.8 Pa, 随着深度增加, pCO₂快速增加, 在水深5 m后逐渐稳定, 最大值为294.2 Pa. 通过计算, 支流草堂河在5, 6, 7月的CO₂通量分别为16.46, −4.91和30.85 mmol·m⁻²·d⁻¹, 库区干流CO₂通量为45.83 mmol·m⁻²·d⁻¹. 因此, 三峡库区干流表现为CO₂的“源”, 支流草堂河CO₂释放远小于库区干流, 6月份表现为“汇”.

关键词: 草堂河, 二氧化碳分压, 二氧化碳通量, 三峡库区, 温室气体

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

中图分类号:

X 142

吴学谦, 操满, 傅家楠, 魏浩斌, 贾晓斌, 邓兵, 汪福顺. 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[J]. 上海大学学报(自然科学版), 2015, 21(03): 311-318.

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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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

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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