[1]何立,黄小燕,赵金彪,等.广西区域夏季中尺度对流系统时空分布特征[J].气象研究与应用,2016,37(01):6-9.
　He Li,Huang Xiao-yan,Zhao Jin-biao,et al.Spatial and Temporal Distribution Characteristics of Mesoscale Convective Systems in Guangxi during summer[J].Journal of Meteorological Research and Application,2016,37(01):6-9.
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广西区域夏季中尺度对流系统时空分布特征()
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气象研究与应用[ISSN:1673-8411/CN:45-1356/P]

卷:
第37卷
期数:
2016年01期
页码:
6-9
栏目:
天气气候
出版日期:
2016-12-20

文章信息/Info

Title:
Spatial and Temporal Distribution Characteristics of Mesoscale Convective Systems in Guangxi during summer
作者:
何立1; 2;  黄小燕1; 2;  赵金彪3;  罗永明1; 2
1. 广西区气象减灾研究所, 广西南宁 530022;
2. 国家卫星气象中心遥感应用实验基地, 广西南宁 530022;
3. 广西区气象台, 广西南宁 530022
Author(s):
He Li1; 2;  Huang Xiao-yan1; 2;  Zhao Jin-biao3;  Luo Yong-ming1; 2
1. Guangxi Institute of Meteorological and Disaster-Mitigation Research, Nanning Guangxi 530022;
2. Remote Sensing Application and Experiment Station of National Satellite Meteorological Centre, Nanning Guangxi 530022;
3. Guangxi Meteorological observatory, Nanning Guangxi 530022
关键词:
中尺度对流系统; 红外亮温; 时空分布特征
Keywords:
Mesoscale convective systems; TBB; characteristics of spatial and temporal distribution
分类号:
P46
摘要:
利用2010~2014年6~8月FY2E高分辨率逐时红外亮温(TBB)数据对广西区域夏季的中尺度对流系统(MCS)进行统计分析。结果表明:该区域MCS分布总体呈东西向带状分布特征,与广西地形走势相关。北部MCS活跃度较低,南部西南暖湿气流受到十万大山的阻挡,MCS非常活跃,形成了广西最重要的一个暴雨中心。在年际变化上,2013年广西区域MCS活动频率较低,2010年较高,其他年份持平。月变化上,6月MCS最为活跃,7月和8月MCS活跃度降低,与广西各月平均暴雨站次分布曲线相吻合。由于广西区域海陆交界处呈显著的海陆风环流特性,因此,MCS日变化特点是白天向陆地传播、夜间向海洋传播,傍晚陆地MCS活跃度达到峰值。上述特性说明了地形和海陆热力差异导致了广西区域MCS独特的气候分布特征。
Abstract:
Based on FY2E hourly infrared TBB dataset during the summer (June-August) from 2010 to 2014 of Guangxi, the statistical analysis of mesoscale convective systems (MCS) were carried out. The results showed that MCS in this region presented the East-to-West distribution feature, which related to the terrain of Guangxi. Because the south-west warm and moist air was resisted by Shiwan Mountains, the MCS in southern was more active than that in northern, which formed an important rainstorm center. Concerning the interannual MCS activity frequency variation, besides the MCS activity frequency held still in the rest of the years, it was lower in 2013 and higher in 2010. By contrast, referring to the monthly MCS activity frequency variation which was consistent with that of monthly average rainfall distribution curve of Guangxi, the MCS activity frequency reach the highest in June and decreased in July and August. Due to the significant characteristics of sea-land breeze circulation at the junction of the land and sea of Guangxi, the characteristics of diurnal variation of MCS is spread to the land in the day while reverse at night and the activity of MCS reached the peak at nightfall. All these characteristics explain that the topography and thermal difference between the land and sea lead to the unique climate distribution of MCS in Guangxi.

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备注/Memo

备注/Memo:
收稿日期:2015-10-28。
基金项目:广西自然科学基金(2012GXNSFBA053133),广西自然科学基金(2012GXNSFBA053134),广西自然科学基金(2013GXNSFBA019225),广西区气象局气象科学研究与技术开发项目(桂气科201304)
作者简介:何立(1977-),男,广西博白人,高级工程师,主要从事卫星遥感应用研究工作
更新日期/Last Update: 1900-01-01