| 宁波北仑港区一次航道海雾地基多源信息观测特征分析 |
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| 引用本文： | 胡利军,杨豪,高爱臻,郑铮.宁波北仑港区一次航道海雾地基多源信息观测特征分析[J].气象科技,2021,49(2):192-199. |
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| 作者姓名： | 胡利军 杨豪 高爱臻 郑铮 |
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| 作者单位： | 1 浙江省宁波市气象网络与装备保障中心，宁波 315012； 2 浙江省气象信息网络中心，杭州 310017;浙江省宁波市气象台，宁波 315012 |
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| 基金项目： | 浙江省基础公益研究计划项目(LGF21D050003)和宁波市气象局科技计划项目(NBQX2020001A)资助 |
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| 摘 要： | 结合天气形势、高空风场、370m高塔、地面要素、激光云高仪、毫米波雷达等资料,对宁波北仑港区航道2018年2月15日海雾过程进行分析。结果表明,这是一次以锋前雾为主的海雾过程,在上暖下冷的锋面背景下,地面水汽充沛、风力温和,近地层逆温结构,都为海雾的形成和维持提供了有利条件。上下大气风向不一致,不利于垂直方向空气交换,有利于雾霾的产生。激光云高仪后向散射系数、颗粒物的消光系数及退偏振比,可以比较清晰地得出雾滴粒子的光学特性和过程演变趋势。随着海雾的生成、发展、消散,后向散射系数强度也呈增强、强、逐渐减弱的变化。雾天气现象下雾滴粒子小且轻,波动幅度比较大,某一高度粒子的傅里叶变换频率谱对应频率较高,高频所占比多数大于50%。
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| 关 键 词： | 海雾 风廓线 370m高塔 激光云高仪 光学特性 |
| 收稿时间： | 2020/4/27 0:00:00 |
| 修稿时间： | 2020/12/29 0:00:00 |
Characteristic Analysis of Ground Based Multi-Source Information Observation of a Sea Fog Process in Waterway of Beilun Port, Ningbo |
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| HU Lijun,YANG Hao,GAO Aizhen,ZHENG Zheng.Characteristic Analysis of Ground Based Multi-Source Information Observation of a Sea Fog Process in Waterway of Beilun Port, Ningbo[J].Meteorological Science and Technology,2021,49(2):192-199. |
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| Authors: | HU Lijun YANG Hao GAO Aizhen ZHENG Zheng |
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| Abstract: | Combining the weather situation and the data of the upper level wind field, 370 m tower monitoring, ground elements, laser cloud height meter, and millimeter wave radar monitoring, the sea fog process on 15 February 2018 in the waterway of Ningbo Beilun Port is analyzed. The results show that this was a sea fog process dominated by the prefrontal fog. Under the background of the upper warm and lower cold front, the surface water vapor was abundant, the wind force was mild, and the structure of near inverse temperature provided favorable conditions for the formation and maintenance of the sea fog. The upper and lower atmospheric wind directions were inconsistent, which was not conducive to the vertical air exchange, but conducive to the generation of fogs or hazes. The optical properties and process evolution trend of fog droplet particles can be clearly obtained by the backscattering coefficient, extinction coefficient and depolarization ratio monitored by the laser cloud altimeter. With the formation, development and dissipation of the sea fog, the intensity of the backscattering coefficient also became increased, intensified and gradually weakened. The droplet particles were small and light in fog weather, and the fluctuation amplitude was large. The Fourier transform frequency spectrum of particles at a certain height had a higher corresponding frequency, the proportion of which was more than 50%. |
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| Keywords: | sea fog wind profile 370 m tower laser cloud height meter optical property |
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