文章摘要
高晓梅1,俞小鼎2,马守强1,杨萌1,王世杰1,周树华1.鲁中地区强对流天气的气候特征及相关环境参数特征分析[J].海洋气象学报,2019,39(3):43-54
鲁中地区强对流天气的气候特征及相关环境参数特征分析
Climatic characteristics and environmental parameters of severe convective weather in central region of Shandong Province
投稿时间:2019-05-04  修订日期:2019-07-31
DOI:10.19513/j.cnki.issn2096-3599.2019.03.006
中文关键词: 强对流天气  气候特征  环境参数  预报阈值
英文关键词: precipitation during warm season  persistent precipitation  diurnal variation  intra-seasonal variation  Beijing-Tianjin-Hebei region
基金项目:国家自然科学基金项目(41775044,41675046);山东省气象局科研项目(2014sdqxm14,sdyby2017 10,2018sdqxz08,sdyby2018-10);环渤海区域科技协同创新基金项目(QYXM201707)
作者单位
高晓梅1,俞小鼎2,马守强1,杨萌1,王世杰1,周树华1 (1. 潍坊市气象局山东 潍坊 261011 2. 中国气象局气象干部培训学院北京 100081) 
摘要点击次数: 769
全文下载次数: 354
中文摘要:
   利用鲁中地区2001—2016年伴随瞬时风力不低于8级的所有强对流天气个例共106次进行分析,总结其气候特征,并通过箱须图的形式研究了分类强对流天气相关环境参数的分布特征和预报阈值。结果表明:2001—2016年强对流天气分布呈山区多、平原少、中部多、北部和西南部少的特点;6月和6月中旬是主要月份和旬份;地面辐合线是最主要触发机制类型;雷暴大风型、冰雹雷暴大风型和强降水混合型对应的地面和850 hPa的平均温度露点差,0~1 km和0~3 km垂直风切变,SWEAT指数、LI指数、K指数、风暴相对螺旋度、高度指数等环境参数各有不同的最低阈值;鲁中地区易发生强对流天气的0 ℃层高度为4.1 km左右;对于伴随冰雹的强对流天气,其融化层高度比0 ℃层高度低0.6 km左右。根据以上环境参数的分布特征、高低空垂直风切变的强弱变化可对3类强对流天气进行一定程度的区分。
英文摘要:
   In this paper, 106 severe convective cases with instantaneous wind force no less than 8 grade in the central region of Shandong Province from 2001 to 2016 are analyzed and their climatic characteristics are summarized. The distribution of environmental parameters and forecast thresholds for classified severe convective weather are studied by the form of box and whisker plots. The results are listed as below. The severe convective weather happens more in mountains, less in plains, more in the central region, and less in the northern and southwestern region. Severe convections frequently occur in June (especially mid-June), accompanied with ground convergence line as the main type of trigger mechanism. For thunderstorms, hail thunderstorms, and mixed type of heavy rainfall, environmental parameters such as the mean depression of the dew point between the ground and 850 hPa, 0-1 km and 0-3 km vertical wind shear, SWEAT, LI (lifting index), K index, storm relative helicity, and height index all have different minimum thresholds. The 0 ℃ layer which is prone to severe convective weather is about 4.1 km in the central region of Shandong Province; for the severe convective weather associated with hail, the melting layer is about 0.6 km lower than the 0 ℃ layer. According to the distribution of the above environmental parameters and the intensity change of upper-level and low-level vertical wind shear, the three types of severe convective weather can be distinguished to some extent.
查看全文   查看/发表评论  下载PDF阅读器
关闭