北京MST雷达探测中间层-低热层观测结果初步分析  

Preliminary analysis of Beijing MST radar observation results in the mesosphere-lower thermosphere

作　　者：田玉芳[1,2] 吕达仁[1] 

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

出　　处：《地球物理学报》2016年第2期440-452,共13页Chinese Journal of Geophysics

基　　金：国家重大科研仪器设备研制专项"多波段多大气成分主被动综合探测系统"(41127901)(NSFC)资助

摘　　要：北京MST雷达是子午工程建设的国内仅有的两部MST雷达之一,为研究其在中间层-低热层MLT区域的探测能力以及数据可靠性,本文应用北京MST雷达2012、2013两年高模式数据,从数据获取率、与廊坊流星雷达测风对比以及风场时空分布特征三个方面进行初步分析.结果是：（1）数据获取率日变化特征为：白天65-100km均可获取数据,数据获取率的高值区主要集中在70-80km,最大值可达80%;夜间主要集中在80-100km,数据获取率在30%及以下.表明该MST雷达白天可以探测到电离层D层和E层低层,夜间D层消失,只探测到E层低层.季节变化特征为：夏季白天可获取数据的时间和高度区间都比较大,春季次之,冬季最小.夏季白天以及日落后1h内可探测到120km.（2）对北京MST雷达与廊坊流星雷达2012年5月份、80-100km高度区间测量的水平风进行对比分析,二者测风结果在时空分布上有很好的一致性,表明MST雷达探测数据是可靠的.（3）2012年和2013年相应月份平均的纬向风、经向风时空分布特征有较高的一致性,并与HWM07模式结果也基本一致.上述初步分析结果表明,北京MST雷达对中间层-低热层60-120km高度区域已具备较强的探测能力,所得结果将可用于MLT过程揭示与驱动因子研究,并可与该高度上其他探测手段作综合研究.Beijing MST radar is one of the Chinese Meridian Project constructions of only two domestic MST radars.It was built by Institute of Atmospheric Physics,Chinese Academy of Sciences,located at Xianghe field observatory,Hebei province（39.754°N,116.962°E）.System integrated test was finished in May 2011 and completed acceptance in the end of July 2011.After1-month joint tests from 21 September 2011to 20 October 2011,Beijing MST radar operated continuously to observe real-time winds and turbulence in the altitude range of 3.5-10km（low mode）,11-25km（middle mode）and 60-90km（even above）（high mode）.Beijing MST radar operates at 50 MHz with a peak power of 172 kW and 104 m2 of antenna area.The purpose of thispaper is to investigate the detection capability and data reliability of Beijing MST radar in the mesosphere-lower thermosphere（MLT）region.Two years of data（January 2012 to December 2013）in high mode were used.From the aspect of data acquisition rate,comparison of wind measurements with the nearby Langfang meteor radar and spatial and temporal characteristics of wind,preliminary analyses were made.Analysis results indicate that：（1）Data acquisition rate shows diurnal variation characteristics：during daytime the MST radar can obtain data in 65-100km.High-ratio areas of data acquisition rate were mainly concentrated in the 70-80km with a maximum of up to 80%.At nighttime available data altitude range focused on 80-100km with data acquisition rate at 30% and below.This indicates that the MST radar can detect ionospheric D layer and lower E layer during daytime,at night time D layer disappears,only lower E layer detected.Seasonal variation characteristics of data acquisition rate are that the time and height range of available data were large in summer daytime,followed by spring,and winter was minimum.During summer daytime and until one hour after sunset,the MST radar can detect up to 120 km.（2）Horizontal winds in 80-100km measured by Beijing MST radar and Langfang meteor radar in Ma

关 键 词：北京MST雷达 中间层-低热层 探测能力 数据可靠性 水平风场时空分布特征 

分 类 号：P412[天文地球—大气科学及气象学]