使用1954—2011年南岳高山站风观测资料、2005—2011年4—9月湖南省气象要素观测资料、1954—2011年NCEP/NCAR全球再分析资料（2.5°×2.5°）以及2011年6月NCEP分析资料（1.0°×1.0°）,从季节变化和年际变化等方面,论证南岳高山站资料对对流层低层环流场的代表性,进而分析其风场演变特征对湖南两例不同类型暴雨过程的指示作用。结果表明：湖南处在南岳高山站风资料与全球再分析资料的年际相关、季节内相关大值区中心附近,高相关区始终位于各季节盛行风的下风方,夏半年资料的相关性好于冬半年,其中以夏季（6—8月）最好;南岳高山站各气象要素与湖南各探空站850 hPa的温度、温度露点差、风向、风速均有正相关关系,其中以温度的相关性最好,风向、风速及温度露点差的相关性相当,相关系数在0.49～0.74之间。%Based on the wind field observations of Nanyue Mountain station during 1954-2011, observational data of the meteorological ele- ments in Hunan from April to September during 2005-2011, NCEP/NCAR global reanalysis data (2.5°× 2.5°) during 1954-2011 and NECP analysis data (1.0° × 1.0°), the representativeness of data from Nanyue Mountain station in relation to lower tropospheric circulation was dis- cussed in terms of the seasonal and interannual variability. And then the indicative function of the wind field evolution characteristics for two cases of different types of torrential rain in Hunan was analyzed. The results show that Hunan is near the center of interannual and intrasea- sonal maximum correlation between the data from Nanyue Mountain station and the data of global reanalysis wind field, the correlation area is at the downstream of seasonal prevailing winds through the year, with the best correlation observed in the summer half year, especially from June to August. There are also positive correlations between the temperature, depression of the dew point, wind direction and speed observed at Nanyue Mountain station with that observed at many sounding stations in Hunan at the corresponding 850 hPa, in which the temperature correlations are the best, the correlations of depression dew point, wind direction and wind speed are well-matched with the correlation coeffi- cient between 0.49-0.74.
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