doi:  10.3878/j.issn.1006-9895.1704.16230
基于加密探空资料对不同海拔高度台站边界层大气的对比分析

A Comparative Analysis of Atmospheric Boundary Layer Based on Intensive Sounding Data at Different Altitude Stations
摘要点击 49  全文点击 45  投稿时间:2016-09-13  
查看HTML全文  查看全文  查看/发表评论  下载PDF阅读器
基金:  国家自然科学基金项目41405145,成都高原气象研究所开放实验室基金项目BROP201614、BROP201714
中文关键词:  探空资料  日变化  垂直递减率  变幅
英文关键词:  Sounding data  Diurnal variation  Lapse rate  Amplitude
        
作者中文名作者英文名单位
卢萍LU Ping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
杨康权YANG Kangquan四川省气象台/高原与盆地暴雨旱涝灾害四川省重点实验室, 成都 610072
李英LI Ying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
引用:卢萍,杨康权,李英.2017.基于加密探空资料对不同海拔高度台站边界层大气的对比分析[J].大气科学,6(6):1234-1245,doi:10.3878/j.issn.1006-9895.1704.16230.
Citation:LU Ping,YANG Kangquan,LI Ying.2017.A Comparative Analysis of Atmospheric Boundary Layer Based on Intensive Sounding Data at Different Altitude Stations[J].Chinese Journal of Atmospheric Sciences (in Chinese),6(6):1234-1245,doi:10.3878/j.issn.1006-9895.1704.16230.
中文摘要:
      本文利用中国气象局成都高原气象研究所西南涡加密观测试验获取的探空资料及地面台站资料,对比分析了高原东侧的四川省境内不同海拔高度台站的边界层特征,结果表明:高海拔地区地表大气受陆面的影响更为剧烈,日变化幅度更大,且极值出现时间更早。温度/比湿/风速的差异都主要体现在低层边界层大气中,越靠近地面,差异越显著。其中,温度递减率在02:00(北京时,下同)最小,14:00最大,高海拔测站受陆面影响的大气层厚度比低海拔测站大,低海拔测站在近地层300 m以下大气中存在明显的逆温现象。14:00近地层大气的比湿最小,午夜02:00近地层大气的比湿最大,高海拔地区低层大气的平均比湿递减率小于低海拔地区。高海拔地区风速日变化幅度大,4个时次的风速廓线形态差异也大;低海拔地区风速变化幅度小,4个时次的风速廓线形态也比较一致。高海拔台站地表大气的日变化幅度大,极值出现时间略早。
Abstract:
      The atmospheric boundary layer characteristics at different altitude stations in Sichuan Province on the eastern edge of the Tibetan Plateau were analyzed and compared using southwest vortex intensive sounding data. The conclusions are as follows. The surface layer at high altitude stations is more influenced by land surface processes; its diurnal variation is also stronger. Temperature lapse rate in the surface layer is the most remarkable, and the daily minimum/maximum value appears at 0200 BT/1400 BT (Beijing time). The depth of the atmosphere layer affected by land surface processes is larger at high altitude stations than at low altitude stations. Temperature inversion obviously occurs below 300-m height at low altitude stations. Specific humidity in the surface layer is the smallest at 1400 BT and the biggest at 0200 BT, and its diurnal variation in the surface layer is slightly greater at high altitude stations than at low altitude stations, while the mean lapse rate in the middle and lower atmosphere is smaller at high altitude stations than at low altitude stations. Wind speed varies within a much wider range at high altitude stations and the vertical wind profiles four times a day are very different from each other, but the opposite is true at low altitude stations. The daily variation amplitude of the surface layer is larger and extreme values appear slightly earlier at high altitude stations.
主办单位:中国科学院大气物理研究所 单位地址:北京市9804信箱
联系电话: 010-82995051,010-82995052传真:010-82995052 邮编:100029 Email:dqkx@mail.iap.ac.cn
本系统由北京勤云科技发展有限公司设计
京ICP备09060247号