| 三峡水库澎溪河春季水华期p(CO2)及影响因素分析 |
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| 引用本文： | 郭劲松,蒋滔,李哲,陈永柏,孙志禹.三峡水库澎溪河春季水华期p(CO2)及影响因素分析[J].水科学进展,2011,22(6):829-838. |
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| 作者姓名： | 郭劲松 蒋滔 李哲 陈永柏 孙志禹 |
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| 作者单位： | 1.重庆大学三峡库区生态环境教育部重点实验室, 重庆400030; |
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| 基金项目： | 国家重点基础研究发展计划(973)资助项目(2010CB955904-04); 国家自然科学基金资助项目(51009155)~~ |
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| 摘 要： | 在三峡水库澎溪河回水区春季水华连续暴发期间(2010年4月10日至5月25日),对渠马至河口总计5个采样断面进行监测。结果表明水华期间水体叶绿素a(Chla),溶解氧(DO)及CO2分压(p(CO2))分层现象明显,表层水体受浮游植物光合作用的影响p(CO2)较低,并且日照充足时,水体为CO2的汇。研究期间表层水体p(CO2)最小值出现在4月25日双江断面,为4.3Pa,吸收通量为-0.28 mmol/(m2·h)。p(CO2)随水深迅速增加,并在10～15m趋于稳定。偏最小二乘回归分析(PLS)表明澎溪河水华期间,浮游植物的生长代谢是控制p(CO2)的关键因素,水温与p(CO2)负相关,但并不构成对p(CO2)的绝对影响。通过引用Ep(CO2)/ADO参数,观测到了澎溪河水体水华暴发的3个阶段,期间澎溪河表层水体经历了从碳汇到碳源最后又回到碳汇的过程。
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| 关 键 词： | 水华 二氧化碳分压 偏最小二乘法 碳源/汇 |
| 收稿时间： | 2010-10-18 |
Analysis on partial pressure of CO_2 and influencing factors during spring phytoplankton bloom in the backwater area of Xiaojiang River in Three Gorges Reservoir |
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| GUO Jin-song,JIANG Tao,LI Zhe,CHEN Yong-bo,SUN Zhi-yu.Analysis on partial pressure of CO_2 and influencing factors during spring phytoplankton bloom in the backwater area of Xiaojiang River in Three Gorges Reservoir[J].Advances in Water Science,2011,22(6):829-838. |
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| Authors: | GUO Jin-song JIANG Tao LI Zhe CHEN Yong-bo SUN Zhi-yu |
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| Institution: | 1.Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Chongqing University, Chongqing 400030, China;2.China Three Gorges Corporation, Yichang 443000, China |
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| Abstract: | Monitoring of the partial pressure of CO2(p(CO2)) was conducted in the backwater area of Xiaojiang River in Three Gorges Reservoir.Water samples were taken from the five cross sections in the Quma-Heikou reach of Xiaojiang River during the spring phytoplankton bloom from April 10 through May 25,2010.Results show that there are obvious stratifications of chlorophyll a(Chla),dissolved oxygen(DO),and p(CO2) in water columns.The value for p(CO2) is low in surface water due to phytoplankton photosynthesis effect... |
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| Keywords: | phytoplankton bloom partial pressure of CO2 partial least squares regression analysis carbon sink/source |
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