• CN 62-1175/P
• ISSN 1006-7639
• 双月刊
• 中国科技核心期刊
• 中国学术期刊综合评价数据库统计源期刊
• 中文科技期刊数据库收录期刊

• 论文 •

### 青海高原致灾性对流天气时空分布特征

1. 1.青海省气象台，青海西宁810001；2.南京信息工程大学大气物理学院，江苏南京210044；
3.中国气象局干部培训学院，北京100081；4.青海省气象科学研究所，青海西宁810001
• 出版日期:2019-06-28 发布日期:2019-07-01
• 作者简介:朱平（1980— ），女，高级工程师，主要从事灾害性天气预报预警和大气遥感研究. E-mail：ping_xjs2010@126.com。
• 基金资助:
国家自然科学基金项目（41865006和41761078）及青海省气象局重点项目共同资助

### Temporal and Spatial Distribution Characteristics of Disastrous Convective Weather over the Qinghai Plateau

ZHU Ping1,2, YU Xiaoding3, WANG Zhenhui2, XIAO Jianshe4

1. 1. Qinghai Provincial Meteorological Observatory, Xining 810001, China;
2. School of Atmospheric Physics, Nanjing University of Information Science & Technology, Nanjing 210044, China;
3. CMA Training Center, Beijing 100081, China; 4. Meteorological Institute of Qinghai Province, Xining 810001, China
• Online:2019-06-28 Published:2019-07-01

Abstract: Based on the conventional observation data from ground weather stations, disaster situation and cloud images in the Qinghai Plateau from 2005 to 2016, the disastrous convective weathers were selected and classified. And on this basis the temporal and spatial distribution characteristics of disastrous convection with different types and their relationship with topography were analyzed. The results are as follows: (1) The disastrous convection in the Qinghai Plateau mainly included thunderstorm, short-time heavy precipitation, hail and mixed type during 2005-2016, and they distributed mostly in the east of the Qinghai Plateau. (2) Topography played a key role in the location, frequency and intensity of disastrous convection. Thunderstorms mostly occurred in mountainous areas, the short-time heavy precipitation and hail mainly occurred in windward slopes, river valleys and open lowlands. The predominant disastrous convections were the mixed type and hail in agricultural area of eastern Qinghai, the mixed in pastoral area of southern Qinghai and the short-time heavy precipitation in Qinghai Lake, Qilian Mountains and Qaidam Basin, respectively. (3) The disastrous convection over the Qinghai Plateau decreased in a fluctuating tendency during 2005-2016. The days and frequencies of disastrous convection were more from 2005 to 2010 (the earlier stage), and they decreased significantly from 2011 to 2016 (the later stage), while the annual variations characteristics of disastrous convection with different types were slightly different. The days of hail and thunderstorm were larger in the early stage and decreased significantly in the later stage. The change trend of mixed type and short-time heavy precipitation days wasn’t obvious, but the annual fluctuant range of the former was larger than that of the latter. (4) Disastrous convection mainly occurred from May to September in the Qinghai Plateau, and the monthly days and frequencies of disastrous convection with different types showed a typical single peak distribution. The peak of hail and mixed type days and frequencies was in August and that of thunderstorm days and frequencies was in June, while the peak of short-time heavy precipitation days and frequencies was in August and July, respectively. (5) Disastrous convection concentrated from 13:00 pm to 01:00 am in the next day, the hail and mixed types dominated at the peak stage (16:00-20:00), while the short-time heavy precipitation dominated in the nighttime.

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