我国典型地区大气透过率的计算分析

主要分析了我国典型地区(西北地区、沿海地区及大陆地区)在2~12 µm波段整层透过率与标准大气模式(1976年美国标准大气、中纬度夏季及中纬度冬季)的偏差，并比较分析了上述两种大气模式下的6种主要吸收分子透过率偏差。结果表明：使用标准大气模式计算我国典型地区的整层大气透过率存在一定的偏差，引起我国典型地区透过率与标准大气模式偏差较大的原因来自H2O分子。1976年美国标大气模式计算我国沿海及大陆地区整层大气透过率的最大绝对偏差达到0.40和0.22；中纬度夏季计算我国沿海及大陆地区7月份整层大气透过率的最大绝对偏差达到0.31和0.29；中纬度冬季计算我国西北、沿海地区1月份整层大气透过率的最大绝对偏差达到0.1和0.36。采用标准大气模式计算我国典型地区整层大气透过率存在一定的偏差，在计算时我国区域内的大气透过率必须考虑我国的大气模式。

Atmospheric Transmittance Calculation in Typical Regions of China

Atmospheric transmittance in typical regions of China was calculated. The average absolute deviation of the results of transmittance calculated with approximate foreign atmospheric model was investigated. The results showed that the average absolute deviations calculated using approximate foreign atmospheric model were larger. For example, the average absolute deviations calculated in coastal and mainland regions of China using 1976 USA atmospheric model can reach to 0.40 and 0.22. The average absolute deviations calculated in coastal and mainland regions of China using midsummer atmospheric model can reach to 0.31 and 0.29. The average absolute deviations calculated in Northwest and coastal regions of China using midwinter atmospheric model can reach to 0.1 and 0.36. These results also illustrate that the atmospheric models of China must be considered for the better estimations of the atmosphere transmittances .