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一次海雾过程形变特征和可预报性分析
黄彬1, 许健民2, 史得道3,3, 柳龙生1
(1.国家气象中心;2.国家气象卫星中心;3.天津市气象局)
Analysis of deformation characteristics and predictability in a sea fog process
Huang Bin1, xujianmin2, shidedao3, liulongsheng2
(1.National Meteorological Center;2.nmc;3.tianqixiangju)
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投稿时间:2017-03-23    修订日期:2018-05-30
中文摘要: 2016年3月3-5日早晨,渤、黄海大部出现了一次大范围持续性的海雾天气过程,大雾期间能见度维持零达48h。本文从卫星遥感监测上分析海雾在生成、发展和消亡三个阶段的形态演变特征。并从海洋气象条件上重点分析了山东半岛东南近海为何没有海雾?本次海雾的形成和低层的偏南暖湿气流有关,而这个偏南暖湿气流来源于西北太平洋,此次海雾过程海温低于海面上的气温,因此是平流冷却雾,露点温度接近海表温度是海雾形成的海气界面条件,气海温差0-1℃的范围和雾区吻合。925hPa到1000hPa弱的垂直风切变有利于海雾在近地层的维持和发展。同时弱的垂直风切变有利于海雾在垂直高度上发展,并形成有一定厚度的海雾。
Abstract:A heavy sea fog occurred over the Yellow Sea and Bohai Sea during the morning from 3 to 5 March. The visibility maintaining zero keep 48 hours. Based on satellite remote sensing data, the morphological evolution characteristics are analyzed from generation,development and disappearance of sea fog.Besides,key explanation is conducted about why there is no sea fog near the southeast coastal of Shandong peninsula.This sea fog formatin is concerned with low level southerly warm air which comes from the Northwest Pacific. This event is advection cooling case because the sea surface temperature is lower than air over the sea. The dewpoint temperature is close to the sea surface temperature,which promotes the formation of this sea fog event.The range of 0-1℃ air sea temperature difference is identical with fog region.Weak vertical wind shear form 925hPa to 1000hPa favors the maintenance and development of sea fog over the surface layer.At the same time, Weak vertical wind shear promotes vertical development of sea fog to a certain thickness.
文章编号:201703230170     中图分类号:    文献标志码:
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
引用文本:
黄彬,许健民,史得道,柳龙生,0.[en_title][J].Meteor Mon,():-.
Huang Bin,xujianmin,shidedao,liulongsheng,0.Analysis of deformation characteristics and predictability in a sea fog process[J].Meteor Mon,():-.