摘要
用开放式傅立叶变换红外光谱仪(FTIR)遥测了2005年北京地区秋季和冬季空气中CH_4的浓度变化,两周实验数据的分析得出了CH_4浓度的日变化趋势,并分析了CH_4浓度的周末效应。CH_4浓度变化主要受湍流和光化学反应的影响.CH_4浓度变化和气象参数,如风速、风向、温度、相对湿度的相关性分析表明风向和风速能影响CH_4浓度。讨论了秋季和冬季CH_4源的不同,分析表明源和风向是影响北京大气CH_4含量的重要因素.
The remote-sensing experiments of CH4 in the fall and the winter of 2005 spent about two weeks with open-path Fourier transform infrared spectroscopy （OP-FTIR） in Beijng. The two-week records of CH4 concentration were examined by means of the time-series analysis to elucidate the seasonal cycle. The weekend effect was analyzed. Turbulence and photochemical condition were the main factors to influence CH4 concentration. Correlations between CH4 concentration and meteorologic variety were also discussed such as wind speed, wind direction, temperature, relative humidity. It is revealed that wind speed and wind direction can affect CH4 concentration. The origin of methane is discussed, and it＇s found that the origins and wind direction are important factors to influence CH4 concentration.
出处
《大气与环境光学学报》
CAS
2007年第4期274-278,共5页
Journal of Atmospheric and Environmental Optics
基金
National Natural Science Fund of China(10274080)
"863"Project(2005AA1010)
关键词
CH4
开放式傅立叶变换红外光谱仪
周末效应
湍流和光化学反应
气象参数
CH4
open path Fourier transform infrared spectroscopy
weekend effect
turbulence and photochemical condition
meteorologic parameters
