CO_2 emission from Dianshan Lake in summer,East China  

作　　者：ZHANG Jing JIANG Yanxing GAO Yang WU Yiying LUO Wenyun ZHOU Zhihua WANG Fushun 

机构地区：[1]School of Environmental and Chemical Engineering,Shanghai University [2]China Earthquake Networks Center

出　　处：《Chinese Journal Of Geochemistry》2013年第4期430-435,共6页中国地球化学学报

基　　金：funded jointly by the National Natural Science Foundation of China(Nos.41273128 and 40873066);the Shanghai Education Committee(12YZ017)

摘　　要：Shallow fresh water bodies in peat areas could be an important contributor to greenhouse gases in the atmosphere.In this study,the partial pressure of CO2 in the surface water of the Dianshan Lake was investigated insitu in August 2011.The average pCO2 in the study area was 2300μatm and fluctuated within the range of 989–5000μatm.pCO2 showed a reverse trend to the variations of pH and DO in the surface water of the Dianshan Lake.The water to air diffusion flux of CO2 of the upstream,middle lake and downstream were respectively 63,33 and 14mmol/m2/d.On average,the diffusion flux of CO2 of the whole lake was 31 mmol/m2/d.Consequently,our results show that during the sampling season,the Dianshan Lake appears to be a great source of CO2.It is also demonstrated that respiration could be the dominant biochemical reaction in the Dianshan Lake in summer.Shallow fresh water bodies in peat areas could be an important contributor to greenhouse gases in the atmosphere. In this study, the partial pressure of CO2 in the surface water of the Dianshan Lake was investigated in- situ in August 2011. The average pCO2 in the study area was 2300 μatm and fluctuated within the range of 989-5000μatm. pCO2 showed a reverse trend to the variations of pH and DO in the surface water of the Dianshan Lake. The water to air diffusion flux of CO2 of the upstream, middle lake and downstream were respectively 63, 33 and 14 mmol/m2/d. On average, the diffusion flux of CO2 of the whole lake was 31 mmol/m2/d. Consequently, our results show that during the sampling season, the Dianshan Lake appears to be a great source of CO2. It is also demonstrated that respiration could be the dominant biochemical reaction in the Dianshan Lake in summer.

关 键 词：CO2排放量 淀山湖 中国东部 二氧化碳分压 夏季 扩散通量 大气压 温室气体 

分 类 号：P402[天文地球—大气物理学与大气环境] X16[天文地球—大气科学及气象学]