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。
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.
作者
朱男男
王科
胡田田
赵玉娟
孙晓磊
ZHU Nannan;WANG Ke;HU Tiantian;ZHAO Yujuan;SUN Xiaoei(Tianjin Central Observatory for Oceanic Meteorology,Tianjin 300074,China;Tianjin Key Laboratory for Oceanic Meteorology,Tianjin 300074,China;Tianjin Meteorological Information Center,Tianjin 300074,China)
出处
《海洋预报》
CSCD
北大核心
2024年第3期90-97,共8页
Marine Forecasts
基金
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)。
关键词
北上台风
统计分析
聚类分析
渤海
预报指标
northward typhoon
statistical analysis
cluster analysis
Bohai Sea
forecast index
作者简介
朱男男(1980-),女,高级工程师,硕士,主要从事海洋预报和研究工作。E-mail:18296759@qq.com。
