【摘要】 分析影响中国降水的热带气旋的气候特征表明,1951—2005年影响热带气旋的频数呈减少趋势,近10年其频数最小;近55年来影响热带气旋中超强台风的频数显著减少;5—11月是热带气旋影响中国的主要时期,7—9月为活跃期。影响热带气旋的源地主要有3个,源地存在明显的年代际和季节变化。影响热带气旋的路径随季节变化有明显的南北移动。影响热带气旋的影响期约为5.6个月,近55年其影响期呈缩短趋势,夏秋季的影响天数较长,冬春季较短。影响热带气旋频次的空间分布呈带状分布,由东南向西北递减,中国台湾省受热带气旋影响最频繁。影响热带气旋的年平均降水量自东南沿海向西北方向逐渐减少。更多还原

【Abstract】 Climatological characteristics of China-influencing tropical cyclones (CITCs) are analyzed in this paper with main characteristics as follows.(1) The frequency of the CITC shows a decreasing trend during 1951—2005,especially after the late 1960s,and the past 10 years have the minimum frequency over this period (nearly 55 years).The CITC is active from May to November,especially from July to September.(2) CITCs have three main sources of location,which are marked by clear decadal and seasonal changes.(3) The paths of CITCs are characterized by different seasonalities.(4) The effect of CITCs lasts about 5.6 months and shows a decreasing trend over the period.(5) The frequency of CITC influences shows a zonal distribution,decreasing from the southeast coast to the northwest inland.更多还原