文章摘要
马秋杰1,李珍妮1,宋小全1,2,吴松华1,2,李荣忠3,涂爱琴4.基于多普勒测风激光雷达的低空急流观测研究[J].海洋气象学报,2019,39(4):61-67
基于多普勒测风激光雷达的低空急流观测研究
Observational study of low-level jet based on Doppler wind lidar
投稿时间:2019-08-05  修订日期:2019-11-11
DOI:10.19513/j.cnki.issn2096-3599.2019.04.007
中文关键词: 低空急流  多普勒激光雷达  风廓线  大气边界层
英文关键词: low-level jet  Doppler lidar  wind profile  atmospheric boundary layer
基金项目:国家重点研发计划项目(2018YFC0213101);国家自然科学基金项目(41375016,41471309)
作者单位
马秋杰1,李珍妮1,宋小全1,2,吴松华1,2,李荣忠3,涂爱琴4 (1. 中国海洋大学信息科学与工程学院海洋技术系山东 青岛 2661002. 青岛海洋科学与技术试点国家实验室区域海洋动力学与数值模拟功能实验室山东 青岛 2662373. 青岛镭测创芯科技有限公司山东 青岛 2661014. 山东省气象局大气探测技术保障中心山东 济南 250031) 
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中文摘要:
      基于相干多普勒测风激光雷达于2018年8月在山东德州获取的为期一个月的风廓线观测数据,进行了低空急流的判定、识别与统计分析。参考BONNER对低空急流的判定标准,对1 500 m高度以下的每10 min平均风廓线数据进行低空急流识别与统计,急流发生频率仅为3.6%。参考张世丰对低空急流的判定标准,统计了350 m高度以下10 min平均风廓线的低空急流风速、高度、风向及风切变等结构特征。急流发生频率为24.9%,急流速度主要介于6~10 m·s-1之间,急流高度出现3个峰值,分别位于110 m、160 m和220 m左右,急流风向主要为偏东风和偏南风。结果表明,多普勒激光雷达可以获取高时空分辨率的风廓线数据,进而可以有效检测低空急流结构的存在及其特征。
英文摘要:
      Based on the wind field observations with the coherent Doppler wind lidar in August 2018 in Dezhou, Shandong, low-level jets (LLJs) are judged, identified, and statistically analyzed. The LLJ identification and statistics are conducted using 10-min averaged wind profile data below 1 500 m based on BONNER's criteria for judging LLJ and the frequency of LLJ is 3.6%. With reference to ZHANG Shifeng's criteria for judging LLJ, the speed, height, direction, and shear of LLJ are calculated using 10-min averaged wind profile below 350 m and the occurrence frequency reaches 24.9%. The jet speed is mainly between 6 and 10 m·s-1 and wind directions are mainly easterly and southerly. There are three peaks of jet height, which are located at about 110 m, 160 m and 220 m. It shows that Doppler wind lidar can effectively get wind profile data of high spatial resolution and thus detect the existence and characteristics of LLJ.
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