2020年12月一次北部湾海雾过程的生消特征分析  

Analysis of generation and dissipation characteristics of a sea fog process in Beibu Gulf in December 2020

作　　者：伍丽泉 郑凤琴 覃皓 郭晓薇 Wu Liquan;Zheng Fengqin;Qin Hao;Guo Xiaowei(Guangxi Climate Center,Nanning 530022,China;Guangxi Meteorological Observatory,Nanning 530022,China;Guangxi Meteorological Disaster Prevention Technology Center,Nanning 530022,China)

机构地区：[1]广西壮族自治区气候中心,南宁530022 [2]广西壮族自治区气象台,南宁530022 [3]广西壮族自治区气象灾害防御技术中心,南宁530022

出　　处：《气象研究与应用》2022年第1期90-95,共6页Journal of Meteorological Research and Application

基　　金：广西重点研发计划项目(桂科AB20159013)。

摘　　要：2020年12月26-28日,北部湾出现了持续性大雾,其中炮台角站连续35h出现大雾。利用北部湾沿岸海岛站、浮标站等观测资料和ERA5再分析资料,对此次典型海雾过程的生消特征进行分析。结果表明,此次海雾过程主要受入海高压后部偏东暖湿气流影响。海雾期间,北部湾上空有逆温层,大气层结稳定,湿层深厚且维持时间长,近地层有0~1.5℃气海温差和水汽通量辐合存在,降温增湿使得平流冷却雾生成维持。随着高压主体逐渐东移,北部湾水汽输送条件转差,近地层相对湿度也急剧下降,海雾消散。From December 26 to 28, 2020, there was continuous heavy fog in Beibu Gulf, including heavy fog at Paojiaotai station for 35h. Based on the observation data of island stations and buoy stations along the coast of Beibu Gulf, and ERA5 reanalysis data, this paper analyzed the generation and dissipation characteristics of this typical sea fog process. The results show that the sea fog process was mainly affected by the eastward warm and humid air flow behind the sea entry high pressure. During the sea fog period, there was a temperature inversion layer over the Beibu Gulf, the atmosphere was stable, the wet layer was deep and lasted for a long time, and there was a 0 ~1.5° C air-sea temperature difference and water vapor flux in the near-surface layer,generating and maintaining the advective cooling fog. As the main body of the high pressure gradually moved eastward, the water vapor transport conditions in the Beibu Gulf became worse, the relative humidity in the near-surface layer also dropped sharply, and the sea fog dissipated.

关 键 词：北部湾海雾 平流冷却雾 生消过程 水汽输送 气海温差 

分 类 号：P426.4[天文地球—大气科学及气象学]