加密探空观测的九龙站低层大气特征分析  

Analysis of Characteristics of the Lower Atmosphere at Jiulong Station Using Encryption Sounding Observation Data

作　　者：卢萍[1] 李英[1] 

机构地区：[1]中国气象局成都高原气象研究所/高原与盆地暴雨旱涝灾害四川省重点实验室,成都610072

出　　处：《高原山地气象研究》2015年第4期53-62,共10页Plateau and Mountain Meteorology Research

基　　金：国家自然科学基金青年科学基金项目(41405145);国家自然科学基金面上项目(41275051);成都高原气象研究所开放实验室基金项目(BROP201512);公益性行业(气象)科研专项经费项目(GYHY201206039)

摘　　要：本文基于多年连续观测所得的九龙站加密探空资料,通过对比分析,认识到该站的边界层大气在夏季呈现以下特征:大气温度/湿度随高度增长而降低,不同时次温度/湿度的差异主要集中在中低层大气中,越靠近地面大气温度/湿度差异越突出。从不同时次的表现来看,08时的温度最低,14时温度值最高。08时和14时大气的比湿较小,02时和20时的大气比湿较大。位温则是随高度增长,最大差异出现在3320m以下大气层中,14时和20时位温廓线存在明显的绝热及超绝热现象,该2个时次大气边界层表现为明显的混合边界层特征,低层大气层结为静力不稳定。而08时和02时的大气廓线则呈现稳定边界层特征。四个时次风速廓线都是次地转的,边界层内某一高度皆有一个风速极大值出现,20时边界层内风速极大值最大。地表物理量逐日演变情况为:08时温度最低,其次是02时,然后是20时,最高温度出现在14时,这个时次的变动幅度也最为显著。14时、08时比湿均值最小,20时、02时平均比湿较大,20时变幅最大。最低气压出现在20时,其次是14时,然后是08时,最高气压出现在02时,20时变幅最大。02时地面风速最小,其次是08时,再次为20时,14时风速最大,变动幅度最大。In this paper, based on encryption sounding data of years of continuous observation at the Jiulong station, through the comparison and analysis, to realize the site boundary layer atmosphere has the following summer,the boundary air＇s temperature/humidity decreases with height, and not at the same time of differences mainly concentrated in the lower atmosphere, the more close to the ground atmospheric characteristics ： in the temperature/humidity temperature/humidity difference is more prominent. Never time performance at the same time, the temperature is lowest at 08：00, the temperature is highest at 14：00. The atmospheric humidity are smaller at 08：00 and 14：00, the air＇ s humidity is bigger at 02：00 and 20：00 Potential temperature is increase with height, the biggest difference in the atmosphere below 3320m. a temperature profile obvious adiabatic and super adiabatic phenomenon at 14：00 and 20：00, mixed boundary layer characteristics is obvious in atmospheric boundary layer at the two times,and atmospheric profile has stable boundary layer characteristics at 08：00 and 02： 00. The boundary layer has a maximum for wind speed, and the wind speed of the boundary layer is the largest at 20 ： O0 Surface physical quantity day by day evolution： temperature is minimum at 08：00, the second at 02.00, the highest temperature appears at 14：00. 14 when, 08, when the minimum average specific humidity is smaller at 14：00 and 08：00, and average specific humidity is bigger at 20：00 and 02：00. Minimum pressure appears at 20：00, followed by 14, the highest pressure appears at 02：00. the ground wind speed is Minimum at 02 ：00,the biggest wind speed appears at 14：00.

关 键 词：探空 边界层 垂直廓线 地表 逐日 

分 类 号：P404[天文地球—大气科学及气象学]