中国八大湖泊冬季水-气界面CO_2通量  

Carbon dioxide flux on the water-air interface of the eight lake in China in winter

作　　者：陈永根[1] 李香华[2] 胡志新[3] 刘伟龙[1] 胡维平[1] 

机构地区：[1]中国科学院南京地理与湖泊研究所 [2]江苏省水文水资源勘测局南京分局,江苏南京210008 [3]安徽大学生命科学学院,安徽合肥230039

出　　处：《生态环境》2006年第4期665-669,共5页Ecology and Environmnet

基　　金：中国科学院知识创新工程项目(KZCX1-SW-01-15);中国科学院资源与环境领域野外台站基金

摘　　要：采用静态箱-气相色谱法对中国不同地区八个湖泊(洞庭湖、鄱阳湖、巢湖、南四湖、洪泽湖、抚仙湖、洱海、滇池)冬季水体的水-气界面CO2通量进行了24h连续观测。结果表明:冬季洞庭湖、巢湖、洱海和滇池24h均为大气CO2的汇,其通量分别为-23.78、-16.08、-24.38、-17.94mg·m-2·h-1;鄱阳湖、南四湖水体则为大气CO2的源,其通量分别为35.76、27.64mg·m-2·h-1;洪泽湖和抚仙湖在晴天时为大气CO2的汇,夜间或阴天为大气CO2的源,但从24h的平均通量来看,洪泽湖为大气CO2的汇,通量为-26.56mg·m-2·h-1;抚仙湖为大气CO2的源,通量16.01mg·m-2·h-1。In order to accurately learn the winter day-change of the carbon dioxide （CO2） flUX at the water-air interface of the eight lakes in China, including Lake Dongting, Lake Poyang, Lake Chao, Lake Nansi, Lake Hongze, Lake Fuxian, Lake Erhai and Lake Dianchi. it was observed continuously for 24-hour based on a closed-chamber and gas chromatography-based system from December 14, 2004 to January 14, 2005. The results indicated that there was great difference among the CO2 flux in eight lakes in winter. Lake Dongting, Lake Chaohu, Lake Erhai and Lake Dianchi were the sink of the atmospheric CO2 during the investigation period, and the average fluxes were -23.78, -16.08, -24.38, and -17.94 mg·m^-2·h^-1 respectively. Lake Poyang and Lake Nansi were the source during the period, and the average fluxes were 35.76 and 27.64 mg·m^-2·h^-1 respectively. Lake Hongze and Lake Fuxian were the sink when it was sunny and were the source when it was cloudy and night, and the average fluxes were -26.56 and 16.01 mg·m^-2·h^-1 respectively according to the average flux of 24-hour, namely, Lake Hongze was the sink and Lake Fuxian was the source in the investigation period.

关 键 词：湖泊 静态箱/气相色谱法 CO2通量 冬季日变化 

分 类 号：X142[环境科学与工程—环境科学]