声雷达资料可靠性及近地面边界层风场特征分析  

Analysis of the Data Reliability and Wind Field Characteristics Near Surface Boundary Layer with Doppler Sodar Observations

作　　者：曹杨 陈洪滨[1] 王普才[1] CAO Yang CHEN Hongbin WANG Pucai(Key laboratory of Middle Atmosphere and Global Environment Observation, Institute of Atmospheric Physic, Chinese Academy of Sciences, Beijing 100029, China University of Chinese Academy of Sciences, Beijing 100049, China)

机构地区：[1]中国科学院大气物理研究所中层大气和全球环境探测重点实验室,北京100029 [2]中国科学院大学,北京100049

出　　处：《高原气象》2017年第5期1315-1324,共10页Plateau Meteorology

基　　金：国家重点基础研究发展计划项目(2013CB955801);国家自然科学基金项目(41275039;41575034;41375039);国家高技术研究发展计划项目(2014AA06A512)

摘　　要：利用2016年5月1日至6月15日在河北省邢台市皇寺气象观测站获得的多普勒声雷达风场资料和探空资料,验证声雷达资料可靠性,并在此基础上,对观测站近地面边界层风场特征进行了分析研究。结果表明,声雷达水平风场资料与探空资料的一致性较好,证明声雷达资料可靠,且声雷达资料与Graw气球探空和台站探空的一致性好于与系留气艇探测的;风场特征分析显示,皇寺站水平风和垂直风日变化特征明显,表现为显著的山谷风特征,白天吹谷风,盛行偏东风,垂直风速相对较大,对流旺盛;夜间吹山风,盛行偏西风,垂直速度较小;在垂直结构上,30~50 m盛行西风或东风,50 m以上逐渐转为偏南风或西北风,且随高度增加,大风速比例和平均风速逐渐增大,说明声雷达探测到的山谷风垂直范围为30~50 m,垂直风速主要集中在-0.1~0.1 m·s-1之间,说明大部分时间对流较弱,以0值为轴,左右比较对称,表明上升气流和下沉气流出现频率相当。Based on the Doppler Sodar data and radiosonde data observed in Huangsi meteorological observation station of Xingtai,Hebei during 1 May to 15 June in 2016,the correlation of Doppler Sodar data and radiosonde data and the wind field characteristics near surface boundary layer are analyzed. The results indicate that： There is a good correlation between Doppler Sodar data and radiosonde data,and the correlation of Sodar and radiosonde data from Grawand station are better than the correlation of Sodar and tethered balloon,the Doppler Sodar data can be used to analyze the wind field characteristics of the study area and also can be used as the supplemental data for other application; According to the analysis of wind field characteristics,the mountain-valley breeze was significant in this area,the valley breeze prevailed at local time from 09： 00 to 20： 00 with larger vertical wind speed and strong convection when the wind was blowfrom east,the mountain breeze prevailed at local time from21： 00 to 08： 00 with small vertical wind speed when the wind was blowfrom west; On the vertical structure,the wind was blowfrom east or west in 30 ~ 50 m height and been weakened with increased height,the wind was blowfrom southeast and northeast beyond 50 m height,and the large wind speed ratio and the average wind speed increased gradually with height; The vertical wind speed were mainly between-0. 1 ~ 0. 1 m ·s-1 which means that most of the time convection was weak,with zero value of shaft,left and right sides was symmetrical which means that the frequency of updraft and downdraft was similar. Besides,according to the percentage of good quality wind observations by Sodar as a function of range gate,the ability of Sodar to detect atmospheric wind speed that more than 400 m height is limited,other wind profile instruments are necessary to study the dynamics and thermodynamic characteristics of atmospheric boundary layer.

关 键 词：声雷达 探空数据 边界层风场特征 山谷风 

分 类 号：P412.23[天文地球—大气科学及气象学]