藏北那曲地区大气边界层特征分析

Study on Characteristics of Atmospheric Boundary Layer over Naqu Region of Northern Tibetan Plateau

利用"全球协调加强观测计划(CEOP)亚澳季风之青藏高原试验"(CAMP/Tibet)2002年8月预试验期间(PIOP)藏北高原观测站(BJ站和安尼站)的无线电探空仪的探空资料,分析了藏北那曲地区的大气边界层位温、比湿、风速的日变化特征及稳定边界层和对流边界层特征。结果表明,藏北那曲地区边界层日变化大,对流混合层高度最高可达1800m,下雨天形成对流边界层的时间晚于阴天和晴天的时间。

Using the observed data in the PIOP (pre-intensive observing period) of CAMP/Tibet (coordinated enhensive observation period (CEOP) Asian-Australian Monsoon Project (CAMP) in the Tibetan Plateau), the characteristics of daily change of equivalent potential temperature, specific humidity and wind speed, as well as that of the steady and convective boundary layers over Naqu region of northern Tibetan Plateau were analyzed. The results showed that the daily change of boundary layer over Naqu region of northern Tibetan Plateau is significant, the height of convective mixed layer can reach 1800 m, and time forming converctive boundary layer in rain day is later than that in cloudy and fine days.