典型草原区生长季大气CO_2浓度特征分析  

The Character of Carbon Dioxide Concentration in Typical Steppe Region of the Growing Season

作　　者：王英舜[1] 史激光[1] 

机构地区：[1]内蒙古自治区锡林浩特国家气候观象台,内蒙古锡林浩特026000

出　　处：《中国农学通报》2010年第13期363-365,共3页Chinese Agricultural Science Bulletin

基　　金：国家自然基金项目"气候波动对典型草原区蒸散和水分平衡影响研究"(30760102);内蒙古气象局重点科研项目"近地层通量变化特征分析及初级产品加工技术"(nmqxkjc200717)

摘　　要：基于锡林浩特国家气候观象台2007至2009年生长季(5～9月份晴日)湍流通量监测资料,结合同步气象资料,分析了典型草原区大气CO2浓度日变化特征及与环境主要因子的关系。结果表明:典型草原区生长季大气CO2浓度日变化呈"正弦"规律波动。最高值出现在5:30左右,为358.1μL/L,最低值出现在13:00左右,为351.1μL/L。与温度、水平风速、光合有效辐射、地表温度(0～5cm)达到显著负相关水平,与空气水蒸气密度、湿度、气压、地温(40cm)达到显著正相关水平。Basing on the Surface Flux Monitoring System Data in the growing season （the fine day of every year May to September between 2007 and 2009） and the same period meteorological data, we make an analysis on the variation characteristics of daily carbon dioxide concentration and the connection with major environmental factors. The results show that the daily variety curve of carbon dioxide concentration is similar to a sinusoid, which highest value of the carbon dioxide concentration is 358.1μL/L showed in 5：30 and the lowest is 351.1μL/L showed in 13：00; It has a significant negative correlation with the temperature, wind speed in level direction and photosynthetical radiation, on the orther hand, it has a significant positive correlation with air vapor density, air humidity, air pressure and underground temperature （40 cm）.

关 键 词：典型草原区 CO2浓度 特征 相关 

分 类 号：P404[天文地球—大气科学及气象学]