摘要
利用2005年第二代地球观测卫星系统(EOS)的Aura卫星上MLS观测的压强、温度、密度等数据,推算出全球中层大气的平均背景风场,分析了中层大气风场随时间和高度变化的特点.与武汉流星雷达及澳大利亚Adelaide台站观测的比较结果显示,用Aura数据推算出来的风场与实际观测比较符合.与HWM-93模式的比较显示,Aura风场随时间和空间变化的总体趋势与HWM-93基本吻合.特别是在80 km以下的高度范围内Aura数据与HWM-93数据符合得比较好;在80km以上的高度,Aura所算得的风值与HWM-93风值的差别逐渐增大,Aura风值普遍比HWM-93的要大.
Global background wind is derived from atmospheric pressure, temperature and density measured by MLS instrument onboard the Aura satellite in this article. The temperal and spacial variations of middle atmospheric wind are also analyzed. Comparisons of the derived Aura wind with WuHan meteor radar and Australian Adelaide observatory prove that the variations of Aura wind associated with time and space are in agreement with the observed results. Comparative result with HWM-93 indicates that the variations of Aura wind associated with time and space are nearly the same as HWM-93, and Aura wind is in better agreement with HWM-93 below 80 km than that above 80 km. The difference of zonal wind from directly observed data is no more than 20 m/s, and the relative difference is less than 18%, and Aura wind speed is larger than HWM-93.
出处
《空间科学学报》
CAS
CSCD
北大核心
2007年第5期400-408,共9页
Chinese Journal of Space Science
基金
国家自然科学基金项目(40474060
40636032)
中国科学院方向性项目(kzcx3-sw-144)
中国科学院空间天气学国家重点实验室开放课题共同资助
关键词
背景风场
地转风
中层大气
HWM-93
Background wind, Geostrophic wind, Middle atmosphere, HWM-93
