1949-2019年中心经过渤海的北上台风统计分析OA北大核心CSTPCD

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.