江西九江近地层温度梯度及风廓线规律的适用性

Temperature Gradient and Applicability of the Wind Profile Law of the Surface Layer of Jiujiang in Jiangxi

利用2013年5月—2014年4月期间一整年各层温度及风观测资料进行统计分析,研究该地区近地面层气温梯度及风廊线规律的适用性,并通过散点图的形式寻找风速比随稳定度参数的变化特征。结果表明:(1)该地区观测期间100m高度的多年平均气温为17.6℃,70m高度为17.7℃,30m高度为17.9℃,10m高度为18.1℃;最冷月为2月,平均气温5.3~5.8℃,最热月为8月,平均气温30.4~31.1℃。(2)该地区四季气温有较大差异,秋季温差最大,冬季最小,四季中春、秋、冬季出现逆温次数较多,夏季较少;逆温强度冬季最强,夏季最弱。(3)非中性层结条件下风速比值随稳定度的增强而离散增大。综上表明,观测期间系统的性能基本上是稳定的,可为该地区今后开展的大气环境研究提供气象背景资料和理论数据参考。

Using the observational data during the period of 2013-05-2014-04,the applicability of temperature gradient and wind profile law in near-surface layer of the area are analyzed. The variation characteristics of wind velocity ratio with the stability parameter are found by the form of scatter plot.The results are as follows:(1) The annual average temperature of the 100 m height during the period is 17.6 ℃, and 17.7 ℃ at the height of 70 m, 17.9 ℃ at the height of 30 m and 18.1 ℃ at the height of 10 m;the coldest month is February with an average temperature of 5.3~5.8 ℃, and the hottest month is August with an average temperature of 30.4~31.1 ℃.(2)The diurnal variation of air temperature in this area accords with the general observed law, and the temperature difference in the four seasons varies greatly, the temperature difference is the maximum in autumn and the minimum in winter.The intensity of inverse temperature is stronger in winter and weaker in summer.(3)The variation characteristics of wind velocity ratio with the stability parameter are found by the form of scatter plot.In summary, the performance of the system during the observation period was basically stable, which can provide meteorological background data and theoretical data reference for the future atmospheric environment research in the region.