【摘要】 利用贵阳L波段探空雷达建站以来2003—2017年探测资料,对贵阳大气边界层上空高度大于1 500 m逆温和强逆温的温差、频率、厚度、强度和底高等特征进行分析。结果表明,从空间分布来看,高空逆温层温差集中在1.0～5.0℃,占比高达90%以上。在大约16 500 m以下的高空大气层内,逆温频率呈现"两峰一谷"的特点。平均厚度07:00、19:00分别为263、282 m,且具有一致的变化趋势。07:00、19:00逆温平均强度分别为0.76～2.38和0.75～2.11℃/100 m。在高空逆温区前半区间即(1 500,8 500]m 2个时次逆温平均强度均大于1.0℃/100 m,在此区间上呈现两低中高的单峰分布。从时间分布看,高空逆温2个时次年均频率约超过60%。冬季高空逆温频率最高,春季次之,夏季最少。2个观测时次均大于20 d的月份出现在冬春季节。高空强逆温相对于高空逆温次数少,07:00、19:00年平均天数分别为4.93和4 d,多出现在500 hPa附近。这类逆温仍然是冬季比夏季多,厚度很薄,温差却极大。更多还原

【Abstract】 The characteristics of inversion and strong inversion such as temperature difference, frequency, thickness, intensity and bottom height over the atmospheric boundary layer in Guiyang are analyzed by using the data from 2003 to 2017 since the establishment of Guiyang L-band sounding radar station.The results showed that from the perspective of spatial distribution, the temperature difference in the upper inversion layer was concentrated between [1.0, 5.0] ℃, accounting for more than 90%.In the atmosphere below 16 500 m, the inversion frequency was characterized by "two peaks and one valley".The average thickness was 263 m at 07:00 and 282 m at 19:00, respectively, with the same trend.The average intensity of inversion at 07:00 and 19:00 was 0.76-2.38 and 0.75-2.11 ℃/100 m, respectively.In the first half of the high altitude inversion region(1 500, 8 500] m, the average intensity of two times inversion was more than 1.0 ℃/100 m and there were two low, middle and high single peak distribution in this region.From the time distribution, the annual average frequency of high altitude inversion was more than 60%.The frequency of inversion was the highest in winter, the second in spring and the least in summer.Two observation times more than 20 days appeares in winter and spring.High altitude strong inversion occurs less than high altitude inversion.The average days at 07:00 and 19:00 were 4.93 d and 4 d respectively, most of them were near 500 hPa.This kind of inversion was still more in winter than in summer, with very thin thickness and great temperature difference.更多还原