摘要
利用2021年贵州威宁大气边界层风廓线雷达资料,对乌蒙山东侧冰雹源地大气边界层风垂直结构特征进行分析,结果表明:(1)针对水平风场季节变化特征而言:夏季风速明显小于春、秋两季,呈现出春季(12.6m/s)>秋季(8.7m/s)>夏季(4.6m/s)的特征;春、夏、秋三季盛行风向在1000m以下均为南风,1000m至3000m为西南风,3000m以上为偏西风,各高度上盛行风向频率表现出春季>秋季>夏季的特征;各季垂直风切变呈现出春季>秋季>夏季的特征,且均在720m高度上存在一个风切变突增区域。(2)针对水平风场日变化而言,720m高度以上各时刻风向均为西北风,15时至20时风速大于其余时刻风速;700-1000m高度上有冷平流侵入,午后至傍晚(12时至18时)冷平流侵入更为显著。(3)针对大气折射率结构常数而言,季节变化特征表现为夏季>秋季>春季的特点,各季在500-700m高度上有一个大气折射率结构常数突增区。日变化特征表现为,各个时刻大气折射率结构常数在1100m高度上从-120量级减小到-130量级,12时至20时2000-3000m高度上存在一个大气折射率结构常数大值中心,且12时至20时,2000m以上的大气折射率结构常数较其余时刻更大,整层大气的湍流运动较其他时刻更为剧烈。
Using the 2021 atmospheric boundary layer wind profile radar data from Weining,Guizhou,the vertical structure characteristics of the atmospheric boundary layer wind in the hail source area on the east side of Wumeng Mountain were analyzed.The results showed that:①Regarding the seasonal variation characteristics of the horizontal wind field,the wind speed in summer was significantly lower than that in spring and autumn,showing the characteristics of spring(12.6m/s)>autumn(8.7m/s)>summer(4.6m/s);The prevailing wind direction in spring,summer,and autumn is south below 1000m,southwest from 1000m to 3000m,and westerly above 3000m.The frequency of prevailing wind direction at various heights shows the characteristics of spring>autumn>summer;The vertical wind shear in each season shows the characteristics of spring>autumn>summer,and there is a sudden increase in wind shear area at a height of 720m.②Regarding the daily variation of the horizontal wind field,the wind direction above 720m is northwest wind at all times,and the wind speed from 15:00 to 20:00 is higher than that at other times;There is cold advection invading at a height of 700-1000m,and the intrusion of cold advection is more significant from afternoon to evening(12pm-18pm).③Regarding the atmospheric refractive index structure constant,the seasonal variation is characterized by summer>autumn>spring,with a sudden increase in atmospheric refractive index structure constant at heights of 500-700m in each season.The daily variation characteristics are manifested as the atmospheric refractive index structure constant decreasing from-120 to-130 at a height of 1100m at various times.There is a center of high atmospheric refractive index structure constant at a height of 2000-3000m from 12:00 to 20:00,and from 12:00 to 20:00,the atmospheric refractive index structure constant above 2000m is larger than at other times,and the turbulent motion of the entire atmosphere is more intense than at other times.
作者
崔蕾
黄钰
唐辟如
张小娟
CUI Lei;HUANG Yu;TANG Pi-ru;ZHANG Xiao-juan(Guizhou Ecological and Agricultural Meteorological Center,Guiyang 550002,China;Guizhou Mountain Meteorological Science Research Institute,Guiyang 550081,China;Guizhou Meteorological Observatory,Guiyang 550002,China)
出处
《价值工程》
2025年第26期154-157,共4页
Value Engineering
基金
贵州省科技计划项目(黔科合基础-ZK[2022]一般246):云贵高原斜坡过渡带冰雹形成微物理机制模拟研究
贵州省气象局登记项目(黔气科登[2021]08-04号):基于探空资料的贵阳市冰雹天气大气垂直结构特征分析。
关键词
威宁县
风垂直结构
边界层风廓线雷达
变化特征
Weining County
vertical wind structure
boundary layer wind profile radar
variation characteristics
