CAJ | 학술논문

利用风廓线雷达探测资料对2010年4月19日塔中一次强沙尘暴过程中的边界层三维风场进行分析研究.沙尘暴爆发前,塔中1000 m高度内空中风主导风向由偏东风转为偏西风;沙尘暴爆发时,地面至1500 m高度内为偏东风.近地面风速在沙尘暴爆发初期迅速增大至18.3 m/s,中后期逐渐变小,但依然保持10 m/s左右的较大风速;300耀1000 m高度,沙尘暴爆发时段的风速小于过程前后;1000耀2000 m高度内,沙尘暴爆发前风速达到最大,然后随时间变化呈递减趋势;3000 m以上高空风在沙尘暴爆发期间风速可达20 m/s.沙尘暴过程中塔中上空存在明显的沙尘颗粒沉降运动,平均下沉速度为1.2 m/s.
이용풍곽선뢰체탐측자료대2010년4월19일탑중일차강사진폭과정중적변계층삼유풍장진행분석연구.사진폭폭발전,탑중1000 m고도내공중풍주도풍향유편동풍전위편서풍;사진폭폭발시,지면지1500 m고도내위편동풍.근지면풍속재사진폭폭발초기신속증대지18.3 m/s,중후기축점변소,단의연보지10 m/s좌우적교대풍속;300요1000 m고도,사진폭폭발시단적풍속소우과정전후;1000요2000 m고도내,사진폭폭발전풍속체도최대,연후수시간변화정체감추세;3000 m이상고공풍재사진폭폭발기간풍속가체20 m/s.사진폭과정중탑중상공존재명현적사진과립침강운동,평균하침속도위1.2 m/s.
The wind character of Boundary layer during sandstorm in Tazhong was given by using the wind profiler radar. The main results are given as follows: April 19 2010 in Tazhong. wind dirction changed from east to west below the 1 000 m altitude before the outbreak of the sandstorm. When the sandstorm occurs the wind direction was east below the 1 500 m altitude. Wind speed near ground increased rapidly to 18.3 m/s during the forming of sandstorm. When the sandstorm occurs the wind speed decreaed to 10 m/s. In the altitude range of 300 m to 1 000 m the wind speed was lower during the sandstorm. In the altitude range of 1 000 m to 2 000 m the changes of wind speed was the same as near ground. Wind speed in above 3 000 m was as high as 20 m/s during the sandstorms. There was a significant sedimentation of sand over the area during the sandstorms, the average sinking speed was 1.2 m/s.