1949-2019年中心经过渤海的北上台风统计分析
Statistical analysis of typhoons moving northward through the Bohai Sea from 1949 to 2019
朱男男 1王科 2胡田田 2赵玉娟 3孙晓磊2
作者信息
- 1. 天津海洋中心气象台,天津 300074;天津市海洋气象重点实验室,天津 300074
- 2. 天津海洋中心气象台,天津 300074
- 3. 天津市气象信息中心,天津 300074
- 折叠
摘要
利用中国气象局热带气旋最佳路径数据集、自动站资料和常规观测资料,统计1949-2019年中心经过渤海海域的北上台风,共计25次过程.台风强度统计结果表明44%的台风过程为热带低压,16%为热带风暴,28%为强热带风暴,12%为台风残涡.台风中心进入渤海后,48%的台风强度减弱,28%的强度不变,24%的强度增强.中心经过渤海的台风96%出现在7-8月,其中7月中下旬—8月上旬占总数的64%,8月上旬的台风数目最多,占总数的29%.北上台风中心最大风速在10～30 m/s,台风入海后平均风速减弱2 m/s.台风中心最小气压为970 hPa,中心最大气压为1 004 hPa,平均气压为992 hPa.西北路径台风中88%进入渤海后强度减弱,偏北路径台风中87.5%进入渤海后强度不变,东北路径台风中83.3%进入渤海后强度增强.
Abstract
Based on the best path data set of tropical cyclones of the China Meteorological Administration,automatic weather station data and conventional observation data,statistical analysis on 25 northward-movement typhoons passing the Bohai Sea from 1949 to 2019 are conducted,with the proportions categorized as tropical depression,tropical storm,strong tropical storm,and typhoon remnant being 44%,16%,28%,and 12%,respectively.48%,28%,and 24%of the typhoons weakened,remained unchanged,and strengthened after moving into the Bohai Sea,respectively.96%of the typhoons passing through the Bohai Sea occurred in July—August,of which 64%were from mid July to early August,and the number of typhoons in early August was the largest,accounting for 29%of the total.The maximum wind speed of the northward-movement typhoons was 10～30 m/s,and the average wind speed decreased by 2 m/s after moving into the sea.The minimum central pressure of the typhoons was 970 hPa,the maximum central pressure was 1004 hPa,and the average central pressure was 992 hPa.88%of the northwestward-movement typhoons weakened after moving into the Bohai Sea,87.5%of the northward-movement typhoons remained unchanged after moving into the Bohai Sea,and 83.3%of the northeastward-movement typhoons strengthened after moving into the Bohai Sea.
关键词
北上台风/统计分析/聚类分析/渤海/预报指标Key words
northward typhoon/statistical analysis/cluster analysis/Bohai Sea/forecast index引用本文复制引用
基金项目
国家自然科学基金(41675046)
国家重点研发计划重点专项(2019YFC1510100)
环渤海区域科技协同创新基金项目(QYXM-202210)
出版年
2024
国家科技期刊平台
NSTL
万方数据