摘要
了解热带气旋的特征规律,对于科学提高热带气旋灾害风险防范能力具有重要现实意义.利用1971—2020年热带气旋路径数据,统计影响中国的热带气旋,分析其时空变化和特征要素.结果表明,近50 a,在西北太平洋生成并影响我国的热带气旋共有716个,年际差异明显,总体呈逐年减少趋势.热带气旋可以深入影响我国的中西部,影响华南的热带气旋数量最多,共计526个.影响我国的热带气旋以偏西路径为主,每年热带气旋开始时间主要集中在5月中旬至6月初,结束时间主要集中于11月,热带气旋开始时间越早(越晚),结束时间越晚(越早),影响我国的热带气旋数量越多(越少).
Understanding the characteristics of tropical cyclones is of great practical significance for improving the ability of disaster risk prevention.Based on the tropical cyclones track data from 1971 to 2020,the spatiotemporal evolution of numbers and the characteristics of tropical cyclones affecting China were analyzed.The results show that in the past 50 years,there were 716 tropical cyclones affecting China in the Northwest Pacific.The annual difference in number was significant,and the frequency of tropical cyclones was decreasing yearly.South China has the largest number of tropical cyclones,with a total of 526,and some tropical cyclones can affect the inland parts of central and western China.The tropical cyclones affecting China mainly have a westward track.The onset of tropical cyclones is mainly concentrated in mid-May to early June,and the end time is primarily concentrated in November.The earlier(later)the onset time of tropical cyclones and the later(earlier)the end time of tropical cyclones,the more(fewer)the number of tropical cyclones affecting China.
作者
李颖
朱美琪
张雪玲
LI Ying;ZHU Meiqi;ZHANG Xueling(School of Geographical Sciences,Liaoning Normal University,Dalian 116029,China)
出处
《辽宁师范大学学报（自然科学版）》
CAS
2024年第1期103-109,共7页
Journal of Liaoning Normal University:Natural Science Edition
基金
国家自然科学基金资助青年项目(42201039)。
关键词
热带气旋
时空特征
频次
路径
tropical cyclone
spatiotemporal evolution
frequency
track
