摘要
2019年3月,利用相干多普勒测风激光雷达首次在辽东湾西部绥中地区进行了风廓线测量试验。根据研究区域海岸线走向采用风向的十六分位法定义局地海风和陆风,分析和提取海陆风特征验证了多普勒测风激光雷达在春季季风间断期间观测海陆风的可行性,并计算和分析了大气边界层湍流能量的变化以及回流水平变化等特性。结果表明:1)绥中地区春季存在明显的海陆风环流特征,测风激光雷达观测海陆风出现的时间与地面自动气象站观测的数据较为一致,符合海陆风日的定义。2)海陆风日发生时,水平局地回流指数(RF)较小,1.2 km以下的RF值小于0.5,使得污染物循环累积,较易形成雾霾天气;但是海风时大气边界层的高度可达1 km以上,有利于低层大气污染物向高层扩散,减轻低层大气污染。研究结果为该地边界层参数化方案的设计和污染的防治提供了参考依据。
In March 2019,wind profile observations were first carried out with the coherent Doppler wind lidar in Suizhong,to the west of Liaodong Bay.The 16-wind compass rose is applied to define local sea breeze and land breeze along the coastline of the study area.The characteristics of sea-land breeze are analyzed and extracted,the feasibility of using Doppler wind lidar to observe sea-land breeze during spring monsoon break is verified,and the variation characteristics of turbulence energy and horizontal recirculation in the atmospheric boundary layer are calculated and analyzed.The results are as shown below.1)There is obvious sea-land breeze circulation in the spring of Suizhong,and the existence of sea-land breeze observed by wind lidar is consistent with the data by ground automatic weather stations,according with the definition of sea-land breeze day.2)When sea-land breeze day appears,the horizontal recirculation factor(RF)is small,lower than 0.5 below 1.2 km,which makes pollutants circulate and accumulate,and thus it is likely to form haze weather;however,the height of atmospheric boundary layer in the case of sea breeze can be higher than 1 km,which makes atmospheric pollutants spread to the upper layer and reduce air pollution in the lower layer.The research results provide reference for the design of boundary layer parameterization scheme and air pollution prevention in Suizhong.
作者
李珍妮
宋小全
马秋杰
吴松华
王箫鹏
李荣忠
LI Zhenni;SONG Xiaoquan;MA Qiujie;WU Songhua;WANG Xiaopeng;LI Rongzhong(Department of Marine Technology in College of Information Science and Engineering,Ocean University of China,Qingdao 266100,China;Laboratory for Regional Oceanography and Numerical Modeling,Pilot National Laboratory for Marine Science and Technology(Qingdao),Qingdao 266237,China;CMA Meteorological Observation Centre,Beijing 100081,China;Qingdao Leice Transient Technology Co.,Ltd.,Qingdao 266101,China)
出处
《海洋气象学报》
2019年第4期52-60,共9页
Journal of Marine Meteorology
基金
国家重点研发计划项目(2018YFC0213101)
国家自然科学基金项目(41375016)
关键词
测风激光雷达
海陆风
绥中
大气边界层
湍流
wind lidar
sea-land breeze
Suizhong
atmospheric boundary layer
turbulence
