2022年1—2月份南宁吴圩国际机场极端低云天气分析  

作　　者：钟若嵋 邹德龙 詹鸿宇 蔡怡 

机构地区：[1]民航广西空管分局,南宁530048 [2]浙江省长兴县气象局,浙江湖州313100

出　　处：《科技创新与应用》2024年第33期82-86,共5页Technology Innovation and Application

摘　　要：利用南宁吴圩国际机场风廓线雷达风场和自动观测系统云高仪资料,结合ERA5逐小时再分析资料,对机场2022年1—2月极端低云及低层风场的时空分布特征进行统计分析,研究结果如下。①极端低云多出现在日出前后,当伴随弱降水天气现象出现时,其持续时间显著增加。②夜间近地面层逆温层的存在和深厚的湿层有利于极端低云的维持。③极端低云多出现在地表高湿条件(RH≥98%)稳定维持一段时间后,温度曲线与相对湿度曲线的交点时间可指征极端低云的消失。④低空水平风速适量增加有利于云底高的降低,冷暖交汇型极端低云的云底高升降与垂直速度的方向呈正相关关系。⑤极端低云的云底高变化趋势与南风特征值关系紧密。Using the wind profile radar wind field and automatic observation system cloud altimeter data from Nanning Wuwei International Airport,combined with ERA5 hourly reanalysis data,a statistical analysis was conducted on the spatiotemporal distribution characteristics of extreme low clouds and low-level wind fields at the airport in January and February 2022.The research results showed that:①Extreme low clouds mostly occur around sunrise,and their duration significantly increases when accompanied by weak precipitation weather phenomena.②The presence of a near surface inversion layer and a deep wet layer at night are beneficial for maintaining extreme low clouds.③Extreme low clouds often occur when the surface high humidity conditions(RH≥98%)remain stable for a period of time,and the intersection time between the temperature curve and the relative humidity curve can indicate the disappearance of extreme low clouds.④An appropriate increase in low-level horizontal wind speed is beneficial for reducing cloud base height,and there is a positive correlation between the vertical velocity direction and the rise and fall of cloud base height in extreme low clouds with cold and warm intersections.⑤The trend of cloud base height variation in extremely low clouds is closely related to the characteristic values of southern winds.

关 键 词：低云 风廓线雷达 风场特征 升降速度 激光雷达 

分 类 号：X16[环境科学与工程—环境科学]