中山大学学报自然科学版 ›› 2011, Vol. 50 ›› Issue (4): 113-120.

• 研究论文 • 上一篇    下一篇

近58年登陆广东热带气旋位置和生成源地的变化

胡娅敏1,2,宋丽莉1 ,罗晓玲2   

  1. (1.中国气象局广州热带海洋气象研究所,广东 广州 510080;2. 广东省气候中心,广东 广州 510080)
  • 收稿日期:2010-09-29 修回日期:1900-01-01 出版日期:2011-07-25 发布日期:2011-07-25

The Variation of the Location and Source Region of Tropical CyclonesMaking Landfall in Guangdong over the Past 58 Years

HU Yamin1,2, SONG Lili1,LUO Xiaoling2   

  1. (1. Institute of Tropical and Marine Meteorology, CMA, Guangzhou, 510080, China;2.Guangdong Climate Center, Guangzhou, 510080, China)
  • Received:2010-09-29 Revised:1900-01-01 Online:2011-07-25 Published:2011-07-25

摘要: 根据1949-2006年《台风年鉴》和《热带气旋年鉴》资料,采用统计方法分析了近58 a登陆广东及各区域热带气旋的频数、时间、强度及其与生成源地的关系,主要结论如下:① 近58年登陆热带气旋最多(少)集中于粤西西区(粤东中区),7-9月是各区登陆高峰期,其中粤西和珠三角呈现出弱的下降趋势,而粤东无明显变化趋势。② 登陆热带气旋生成源地具有明显的季节分布特征,大部分热带气旋从5月开始生成,随后源地逐渐向东向北扩大,9月达到最东和最北位置,从10月开始逐步南移和西移。但各区登陆时间与发生源地的关系无明显规律性。③ 登陆广东不同强度的热带气旋,其生成区域也不同:登陆时达到热带气旋等级的集中生成于南海、菲律宾海盆和加罗林群岛,登陆时达到热带低压和热带风暴等级的主要生成于南海,登陆时达到强热带风暴和超强台风等级的生成于西太平洋。各区均以强热带风暴和台风登陆居多、热带低压和热带风暴较少,登陆粤东的强度强于粤西。南海地区生成的热带气旋以登陆粤西最多,其次是珠三角,登陆珠三角和粤东的超强台风源地较粤西偏南偏东。登陆粤西和粤东的热带气旋源地分布于在西北—东南走向的带状分布区间内,而珠三角较为分散。

关键词: 热带气旋, 广东, 登陆位置, 生成源地

Abstract:

Based on the data of Tropical Cyclones (TCs for short) making landfall in Guangdong from 1949 to 2006, the variations of TC parameters, such as frequency, landfall time, intensity and the relationship between these parameters and the source regions, have been analyzed. The folloing conclusions are obtained: (1) The highest (lowest) landfalling frequency of TCs occurs in the western subregion of western Guangdong (the middle subregion of eastern Guangdong). The peak period is from July to September. There occurs a weak descent trend in western Guangdong and the Pearl River Delta, but not in eastern Guangdong. (2) The source regions of TCs show an obvious seasonal distribution. Most of TCs are generated from SCS in May, then, the source region of TCs expands eastwards and northwards until September. Since October the source region moves southwards and westwards. There is no distinct relationship between the landfall time and source region. (3) The TCs with different intensities are originated from different regions. The source regions of TCs are the South China Sea (SCS), the Philippines seabasin and the Caroline Islands. The Tropical Depress (TD) and Tropical Storms (TS) are mainly generated from the SCS, and the Strong Typhoons (STY) and Super Typhoons (SUPERTY) are originated from the West Pacific. There are more STS and TY than TD and TS. The intensity of landfalling TCs in eastern Guangdong is stronger than that in western Guangdong. TCs originated from the SCS mostly make landfall in western Guangdong and in the Pearl River Delta. The source regions of landfalling SUPERTY in the Pearl River Delta and eastern Guangdong move further southwards and eastwards than those in western Guangdong. The source regions of landfalling TCs in western and eastern Guangdong are mainly distributed in a beltshaped area from northwest to southeast, whereas the source regions of landfalling TCs in the Pearl River Delta are dispersed.

Key words: tropic cyclone (TC), Guangdong, landfall location, source region

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