Abstract:

Based on the GFE(L)wind radar data of the upper－air observatory in Yichang of Hubei Province，the seasonal characteristics of the height of tropopause，temperature and wind in troposphere were analyzed．The results indicated that there was evident seasonal change for these elements，the height of the tropopause was maximum in winter and decreased in spring，summer and fall one by one．The temperature of the tropopause was maximum in winter and minimum in summer;the temperature of the troposphere was mainly effected by solar short－wave radiation，and it had not only seasonal change but also evident daily change．The wind velocity was not over 10 m/s in lower troposphere and increased with height，and it came to a maximum at the height of 12 km in spring，autumn and winter．The wind direction near the surface layer varies obviously，and in summer it was changeful in troposphere，it was west wind in spring，autumn and winter．

Key words: troposphere, the height of tropopause, temperature profile, wind speed profile

摘要：

利用2006年湖北省宜昌市高空观象台基于GFE(L)1型二次测风雷达观测的高空探测资料，分析了该地区对流层顶高度、对流层内温度、风等要素的季节特征。分析结果表明:这些要素显现出明显的季节差异，对流层顶高度在冬季最高，春、夏、秋依次减小;对流层顶温度夏季最低，冬季最高，春秋介于两者之间;对流层内的温度变化主要受太阳短波辐射的影响，不仅有明显的季节变化，且日变化显著;对流层的底层风速基本在10 m/s以内，风速随高度递增，春秋冬季在12 km左右达到一个极值;近地面风向变化大，以上的对流层内夏季变化大，春秋冬盛行西风。

关键词: 对流层, 对流层顶高度, 温度廓线, 风速廓线