Abstract: The marine fog observation experiment had been carried out in the area of Beilun Port, Ningbo, Zhejiang in December 2014 and March 2015 using millimeter wave radar and four visibility meters distributed near the radar in order to get the relation between radar reflectivity factor and visibility. The change of visibility and other micro-physics parameters of marine fog could be found by comparing data obtained from the above equipments. The results are as follows: (1) The information of sea fog distribution, fog intensity change with distance or height, and the internal vertical distribution were obtained from millimeter wave radar products.(2) In the marine fog area, the visibility would reduce when radar reflectivity factor rose and vice versa. The millimeter wave radar reflectivity factor and visibility had a well correlation on the whole. (3) The inversion and observation of visibility had well consistency and relevance, the revised visibility data were reliable. With revised algorithm and observation equipment, the visibility accuracy of sea fog could be improved.

Key words: millimeter wave radar, visibility meter, radar reflectivity factor, visibility of marine fog

摘要： 利用2014年12月和2015年3月浙江省宁波市北仑海港光明码头毫米波雷达观测数据及分布在毫米波雷达附近的4部前向散射能见度仪观测数据，开展海雾联合观测实验，建立雷达反射率与海雾能见度的关系。结果表明：（1）毫米波雷达可以获取海雾的内部结构、分布范围、云雾强度随距离和高度的变化趋势；（2）当雷达反射率上升时，能见度降低，反之升高。通过毫米波雷达反演的能见度与能见度仪观测值有较好的相关性；（3）订正后的反演算法进一步提高了毫米波雷达反演海雾能见度的准确性。

关键词: 毫米波雷达, 能见度仪, 雷达反射率, 海雾能见度