大连机场大雾天气的雷达探测与数值模式分析

The Detection with Radar and the Analysis with WRF of Fog Weather in Dalian Airport

大连地区三面环海,受平流海雾影响常出现低云低能见度天气,有时大雾整日不散。本文选取大连地区一次典型平流海雾进行研究,利用云雾探测系统(包括毫米波雷达、微波辐射计和风廓线雷达)的单站探测资料与WRF模式的模式输出结果对比分析大雾期间能见度与低云的演变过程。结果表明,云雾探测系统在大雾期间探测到的气象数据结果与WRF模式的模式输出结果比较吻合,都能有效反映大连机场大雾过程各类气象要素的演变情况。

Dalian area is surrounded by sea from three sides. Influenced by the sea advection fog, low clouds and low visibility weather often appear in Dalian Airport, sometimes they last all day. In this article, a typical sea advection fog in Dalian area is selected and studied. The observation data of Cloud and Fog Detection System （including millimeter wave radar, microwave radiometer, and wind profile radar） and the output results of WRF model are used to analyze the evolution process of low clouds and visibility during the fog. The results show that both the observation data of Cloud and Fog Detection System and the output results of WRF model can effectively reflect the variation of meteorological elements during fog process.