利用上海市宝山气象站探空气象资料，统计分析了1991～2009年上海地区贴地逆（等）温出现的频率、逆（等）温层厚度和逆温层强度。
Based on the sounding data from Baoshan weather station , the frequency , thickness and intensity of ground inversion ( isothermal ) layer in Shanghai were analyzed during the period of1991-2009 .
上海宝山站