塔克拉玛干沙漠腹地夏季稳定边界层高度计算与分析  

Calculation and analysis of summer stable boundary layer height in the hinterland of Taklimakan Desert,China

作　　者：杨郭程 毛东雷[1] 王敏仲[2] 张建涛[2] 潘红林 Guocheng Yang;Donglei Mao;Minzhong Wang;Jiantao Zhang;Honglin Pan(School of Geography and Tourism/Key Laboratory of Lake Environment and Resources in Arid Region,Xinjiang Normal University,Urumqi 830054,China;National Observation and Research Station of Taklimakan Desert Meteorology of Xinjiang/Taklimakan Desert Meteorology Field Experiment Station of China Meteorological Administration/Xinjiang Key Laboratory of Desert Meteorology and Sandstorm,Urumqi Desert Meteorological Institute,China Meteorological Administration,Urumqi 830002,China)

机构地区：[1]新疆师范大学地理科学与旅游学院/干旱区湖泊环境与资源重点实验室,新疆乌鲁木齐830054 [2]中国气象局乌鲁木齐沙漠气象研究所新疆塔克拉玛干沙漠气象国家野外科学观测研究站/中国气象局塔克拉玛干沙漠气象野外科学试验基地/新疆沙漠气象与沙尘暴重点实验室,新疆乌鲁木齐830002

出　　处：《中国沙漠》2023年第4期64-75,共12页Journal of Desert Research

基　　金：新疆维吾尔自治区杰出青年科学基金项目(2022D01E07);“天山英才”培养计划科技创新团队(天山创新团队)项目(2022TSYCTD0007)。

摘　　要：利用塔克拉玛干沙漠塔中站2021年7月6—17日加密探空观测数据,分别采用Coen法、Rib法、Liu-Liang法、反转强度法等4种方法进行了稳定边界层高度计算,比较了不同方法计算结果之间的差异,并结合塔中站80 m观测塔梯度探测系统资料,分析了近地面气象因子和稳定边界层高度之间的关系。结果表明:(1)试验期间塔克拉玛干沙漠腹地稳定边界层高度在1000 m以内,采用4种方法计算的平均高度依次为141、269、227、173 m,平均为202.38 m。稳定边界层在日落后开始发展,并在日出前后发展到最厚,采用4种方法计算的稳定边界层高度平均值从22:15的49、257、164、121 m分别上升至07:15的220、290、242、188 m,边界层高度上升趋势明显。(2)采用4种方法计算的稳定边界层高度总体变化趋势一致,但存在个别极端值,极端值出现多与特殊天气现象有关。其中采用Rib法计算的稳定边界层高度分布范围(10~890 m)大于采用其余3种方法计算的高度范围,可能因为Rib法既考虑了热力因素又考虑了动力因素,综合性较好。采用其余3种方法计算的高度略低,原因可能是每个时刻边界层发展并不均匀,夜间4个时刻平均后拉低了总体平均值,观测期间不同个例地面辐射冷却强度和湍流运动强度也会有影响。(3)不同天气条件下采用4种方法计算的稳定边界层高度也不尽相同。在晴朗夜晚条件下,采用4种方法计算的稳定边界层高度平均偏差最小,高度变化趋势相近;在沙尘天气中,采用4种方法计算的稳定边界层高度平均偏差居中,高度差异主要体现在日出或日落前后;雨天情况下,受边界层内各气象要素变化影响,采用4种方法计算的高度整体差异较大,平均偏差也最大。(4)在晴天天气下,采用Coen法确定的稳定边界层高度呈现出明显的升高过程,能够较为完整地描述稳定边界层在夜间的发展变化过程,几乎没有出现突然�In this paper,using the encrypted sounding observation data of Tazhong observation station in Taklimakan Desert on July 6-17,2021,the stable boundary layer height was calculated by using Coen method,Rib method,Liu-Liang method and inversion intensity method respectively,and the differences among the calculation results of different methods were compared,and the relationships between near-surface meteorological factors and the height of stable boundary layer is analyzed in combined with 80 m observation tower gradient detection system data.The results show that:(1)During the experiment,the height of stable boundary layer in the hinterland of Taklimakan Desert was less than 1000 m.The average height calculated by the four methods was 141,269,227,173 m respectively,and the total average height was 202.38 m.The stable boundary layer began to develop after sunset and developed to the thickest around sunrise,and the average height of the stable boundary layer calculated by the four methods increased from 49,257,164,121 m at 22:15 to 220,290,242,188 m at 07:15,respectively.(2)The overall trend of the stable boundary layer height calculated by the four methods is consistent,but there are individual extreme values,and the extreme values are mostly related to special weather phenomena.The height distribution range(10-890 m)of stable boundary layer calculated by Rib method is larger than that calculated by the other three methods,which may be due to the consideration of both thermodynamic and dynamic factors.The heights calculated by the other three methods are slightly lower,probably because the boundary layer development is not uniform at each time,the four-time average at night lowers the overall average and is affected by the intensity of surface radiation cooling and turbulent motion during different observation cases.(3)The stable boundary layer height calculated by the four methods under different weather conditions is also different.Under clear night conditions,the average deviation of the stable boundary layer heig

关 键 词：稳定边界层高度 计算方法 影响因子 塔克拉玛干沙漠 

分 类 号：O357[理学—流体力学]