J4 ›› 2011, Vol. 29 ›› Issue (2): 195-200.
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ZHENG Qingfeng,SHI Jun
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郑庆锋,史军
作者简介:
基金资助:
上海市自然科学基金项目( 09ZR1428800) 和国家自然科学基金项目( 40901031 和41001283) 共同资助
Abstract:
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 of 1991 - 2009. The results indicated that from 1991 to 2009,the annual days of ground inversion decreased,and the average thickness of ground inversion also decreased with a linear trend at 08: 00 and 20:00,but the annual mean intensity of ground inversion changed insignificantly at 08: 00 and 20: 00. In the past 19 years,the temperature inversion days were most in winter,and the average intensity of ground inversion was strongest in winter,but the average thickness of ground inversion was least in summer. Annual days and averaged thickness of ground isothermal layer were also decreased with a linear trend at 08: 00 and 20: 00 during 1991 - 2009. The frequency of ground isothermal layer was most in summer and least in winter,but the average thickness of ground isothermal layer was most in winter and least in summer.
Key words: Shanghai, ground inversion, ground isothermal layer, intensity of inversion layer, thickness of inversion layer
摘要:
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。结果表明, 1991 ~ 2009 年期间,上海逆温日数和逆温层平均厚度在08 时和20 时呈线性趋势减少,而逆温平均强度则没有明显变化。逆温日数和强度冬季最多和最强,逆温平均厚度夏季最小。08 时和20 时贴地等温日数和等温层平均厚度在过去19 a 也都呈线性趋势减少。等温出现日数夏季最多,冬季最少; 而贴地等温平均厚度冬季最大,夏季最小。
关键词: 上海, 贴地逆温, 贴地等温, 逆温强度, 逆温层厚度
CLC Number:
P423. 6
郑庆锋,史军. 上海地区大气贴地逆温的气候特征[J]. J4, 2011, 29(2): 195-200.
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