文章摘要
阿拉伯海热带气旋生成特征分析
Characteristics of Tropical Cyclones genesis in the Arabian Sea
投稿时间:2021-07-20  修订日期:2021-11-04
DOI:
中文关键词: 热带气旋  阿拉伯海  特征分析  气旋累积能量
英文关键词: tropical cyclone  Arabian Sea  characteristic analysis  accumulated cyclone energy
基金项目:国家重点研发计划(2019YFC1510400);国家自然科学基金(41930967,41975054,41790471);中国科学院战略性先导科技专项(XDA20100304)
作者单位邮编
李畅 南京信息工程大学气象灾害教育部重点实验室/气候与环境变化国际合作联合实验室/气象灾害预报预警与评估协同创新中心中国海洋大学海洋与大气学院 210044
姜霞 中国海洋大学海洋与大气学院 266100
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中文摘要:
   利用印度气象局(IMD)、国际气候管理最佳路径档案库(IBTrACS)提供的1982-2020年阿拉伯海热带气旋路径资料,美国国家环境预报中心(NCEP)再分析资料,对近39年阿拉伯海热带气旋源地和路径特征、活跃区域、频数及气旋能量指数(ACE)的季节特征和年际变化特征进行分析,并结合环境因素,说明其物理成因。结论表明:阿拉伯海热带气旋多发于10°~25°N,65°~75°E海域,在5-6月、9-12月发生频数较高且强度较强,在1-4月、7-8月发生频数较低且气旋近中心最大风速均小于35 knots。频数的季节变化主要受控于垂直风切变要素。阿拉伯海热带气旋发生频数和总气旋能量指数(ACE)近年有上升趋势,年际变化主要受控于海表面温度(SST)和850 hPa相对湿度要素。
英文摘要:
   Based on the Best Track data of tropical cyclones in the Arabian Sea from 1982 to 2020 provided by India Meteorological Department (IMD) and International Best Track Archive for Climate Stewardship (IBTrACS), and the reanalysis data provided by National Centers for Environmental Prediction (NCEP) , the source and track characteristics, active area, seasonal and interannual variation characteristics of frequency and Accumulated Cyclone Energy (ACE) of tropical cyclones in the Arabian Sea in 39 years are analyzed. And combined with environmental factors, the physical causes are explained. The results show that most of the tropical cyclones in the Arabian Sea occur in 10°N~25°N, 65°E~75°E. The frequency is high and the intensity is strong from May to June and September to December. The frequency is low from January to April and July to August, and the maximum wind speed near the center of the cyclone in these months is less than 35 knots. The seasonal variation of frequency is mainly controlled by vertical wind shear. The occurrence frequency of tropical cyclones and Accumulated Cyclone Energy (ACE) in the Arabian Sea are increasing in recent years, and the interannual variation is mainly controlled by Sea Surface Temperature (SST) and 850 hPa relative humidity.
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