[1]古明悦,韦晶晶,郑凤琴,等.北部湾典型大雾过程环流特征及气象要素对比分析[J].气象研究与应用,2019,40(03):47-51,67.
　Gu Mingyue,Wei Jingjing,Zheng Fengqin,et al.Circulation Features and Meteorological Elements of Typical Heavy Haze Processes in the Beibu Gulf[J].Journal of Meteorological Research and Application,2019,40(03):47-51,67.
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北部湾典型大雾过程环流特征及气象要素对比分析()
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气象研究与应用[ISSN:1673-8411/CN:45-1356/P]

卷:
第40卷
期数:
2019年03期
页码:
47-51,67
栏目:
天气气候
出版日期:
2019-10-21

文章信息/Info

Title:
Circulation Features and Meteorological Elements of Typical Heavy Haze Processes in the Beibu Gulf
作者:
古明悦1;  韦晶晶2;  郑凤琴2;  钟利华2
1. 广西南宁市气象局, 南宁 530028;
2. 广西壮族自治区气象服务中心, 南宁 530022
Author(s):
Gu Mingyue1;  Wei Jingjing2;  Zheng Fengqin2;  Zhong Lihua2
1. Nanning Meteorological Service, Nanning Guangxi 530028;
2. Guangxi Meteorological Service Center, Nanning Guangxi 530022
关键词:
北部湾; 海雾; 典型个例; 分析
Keywords:
Beibu Gulf; sea fog; typical case; analysis
分类号:
P467
摘要:
利用NCEP/NCAR再分析资料和北部湾地区5站地面观测资料，对比分析了3次典型大雾过程的环流背景和气象要素特征。结果表明：（1）平流雾维持时间最长、强度最强，辐射雾发生范围最广，锋面雾发生范围最小、持续时间最短；（2）锋面雾和平流雾500hPa有较明显的南支槽，副高偏强，850hPa偏南风偏强，因冷空气入侵或冷空气减弱东移与暖湿气流相遇而成雾，辐射雾过程无冷空气直接影响，因夜间辐射冷却而成雾；（3）辐射雾过程气温与能见度呈同相变化特征，露点温度呈逐日上升趋势，锋面雾前期和后期气温、露点温度与能见度分别呈反相和同相变化特征，平流雾过程气温、露点温度呈逐日升高趋势，能见度具有较明显日变化特征；（4）辐射雾和锋面雾发生时相对湿度≥ 93%，偏南风和偏北风风速减小；平流雾期间相对湿度持续≥ 90%，风速由弱偏北风转偏南风。
Abstract:
Based on NCEP/NCAR reanalysis data and ground observation data of 5 stations in Beibu Gulf, the circulation background and meteorological characteristics of 3 typical fog processes are compared and analyzed. The results show that:(1) the advection fog has the longest duration and the strongest intensity, the radiation fog has the widest range, the frontal fog has the smallest range and the shortest duration. (2) Frontal fog and advection fog have obvious south branch grooves and strong sub-high intensity at 500hPa, southerly wind is strong at 850hPa. They are formed due to the cold air intrusion or cold air weakening eastward and meeting the warm-humid airflow. Cold air has no direct effect on radiation fog process, which is caused by night radiation cooling. (3) Temperature and visibility of radiation fog are in phase change, and dew point temperature increases day by day. Temperature, dew point temperature and visibility of frontal fog in the early and late stages show opposite phase and phase changes, respectively. The temperature and dew point temperature of advection fog process increase day by day, and its visibility has obvious diurnal variation characteristics. (4) When radiation fog and frontal fog occur, the relative humidity is greater than or equal to 93%, the southerlywinds and northerly decreases. The relative humidity is continuously greater than or equal to 90% during the advection fog process, and the wind changes from weak northerly wind to southerly wind.

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备注/Memo

备注/Memo:
收稿日期:2018-12-05。
基金项目:广西自然科学基金项目（2016GXNSFAA380330）
作者简介:古明悦(1987-),男,大学本科,主要从事天气预报。E-mail:149491895@qq.com
更新日期/Last Update: 1900-01-01