锦州生态站边界层特征研究  

Study on boundary layer characteristics of Jinzhou ecological station

作　　者：邹旭东[1] 赵胡笳[1] 王笑影[1] 李克非 蔡福[1] 杨洪斌[1] 张云海[1] 汪宏宇[1] 刘玉彻[1] ZOU Xu-dong;ZHAO Hu-jia;WANG Xiao-ying;LI Ke-fei;CAI Fu;YANG Hong-bin;ZHANG Yun-hai;WANG Hong-yu;LIU Yu-che(Shenyang Institute of Atmospheric Environment,CMA,Shenyang110166,China;Liaoning Province Meteorological Equipment Support Center,Shenyang110166,China)

机构地区：[1]中国气象局沈阳大气环境研究所,沈阳110166 [2]辽宁省气象装备保障中心,沈阳110166

出　　处：《湖北农业科学》2020年第22期66-74,共9页Hubei Agricultural Sciences

基　　金：国家重点研发计划项目(2018YFC1506802);国家自然科学基金项目(41605112);中央级公益性科研院所基本科研业务费项目(2017;2018)。

摘　　要：为了探索锦州生态站的大气边界层结构,分别选择2016年10月和2017年2月、4月、7月各一天。利用NCAR/NCEP资料分析500 hPa气压场、850 hPa气压场天气形势特征;利用WRF模式对8:00和20:00地面风场、垂直剖面风场、48 h边界层高度进行数值模拟;利用微波辐射计探测锦州生态站地面至10 km高空的温度、湿度。结果表明,500 hPa气压场锦州处于槽附近的位置,偏西或偏北气流,冷空气过境,温度下降。850 hPa气压场锦州处于低压系统和高压系统之间的位置,偏北气流或偏南气流。地面风场处于高压辐散气流,偏西和偏北风向。剖面风场近地面都是下沉气流,20:00近地面不同高度出现不稳定层结。10 km高度温度差距不大,逆温层高度2月最低,10月最高。地面至高空的湿度变化呈波动状,日变化明显,其中,2月湿度日变化较小,地面至高空波动幅度较小。边界层高度低值出现在19:00至次日8:00,高值出现在12:00至15:00。边界层高度低值差距不大,2月最小;边界层高度高值差距大,2月最小,7月最大。In order to explore the atmospheric boundary layer structure of Jinzhou ecological station,one day in October 2016,February 2017,April and July respectively is to be selected.Using NCAR/NCEP data,the characteristics of 500 hPa pressure field and 850 hPa pressure field weather situation are analyzed;WRF model is used to simulate the surface wind field at 8:00 and 20:00,the vertical profile wind field,and the 48h boundary layer height;Microwave radiometer is used to detect the temperature and humidity of Jinzhou ecological station from the ground to an altitude of 10 km.The results show that,the position of Jinzhou is near the trough,the air flow is to the west or north,and the cold air passes through the trough and the temperature drops at the 500 hPa pressure field.The position between low pressure system and high pressure system at 850 hPa pressure field,the airflow comes from the north or south.The ground wind field is in high pressure divergent air flow,wind direction to west or north.The profile wind fields are all downdraft near the ground.Atmospheric instability occurs at 20 o’clock at different altitudes from the ground.There is little change in temperature at a height of 10000 meters from the ground.The height of inversion layer is lowest in February and highest in October.The variation of humidity from the ground to the upper air shows a fluctuating shape.The change is obvious in one day.Among them,there is relatively small change in the humidity within one day of February,the change from ground to upper air is relatively small.The boundary layer height is low between 19:00 on the first day and 8:00 on the second day.The high values appear between 12:00 and 15:00.The difference of boundary layer height and low value is small,of which February is the smallest.The difference of the height of the boundary layer is large,with the smallest in February and the largest in July.

关 键 词：大气边界层 结构特征 锦州生态站 

分 类 号：P463.3[天文地球—大气科学及气象学]