摘要
利用1967—2013年影响斗门热带气旋的频数、强度以及海温、西太平洋副热带高压指数等资料,采用M-K法、Yamamoto法、功率谱分析以及相关方法分析了影响斗门热带气旋的气候特征及其与太平洋海温、西太平洋副热带高压的关系。结果表明：（1）影响斗门热带气旋的频数有明显的年代际变化,20世纪80年代初之前为多热带气旋时期,80年代初到2007年期间为少热带气旋时期。（2）4—12月皆有热带气旋影响斗门,其中7—9月最多,影响也最为严重。（3）影响斗门的热带气旋频数存在2～3年左右的显著周期。（4）影响斗门的热带气旋强度存在2～4年左右的显著周期,但长期变化趋势不明显。（5）太平洋海温对热带气旋的频数和强度的影响有不同的关键区;而副热带高压的面积、西伸脊点位置主要影响热带气旋的频数,其脊线位置、588 dagpm线北界位置则影响热带气旋的强度。
With the data of frequency and intensity of tropical cyclones（ TCs） affecting Doumen District,sea surface temperature（ SST） and indices of the western Pacific subtropical high（ WPSH） from 1967 to 2013 and analysis means of Mann- Kendall test,Yamamoto method,power spectrum and correlation,we studied the climatological characteristics of the TCs affecting Doumen and their relationship with the Pacific SST and the WPSH. The result is shown as follows.（ 1） There are significant interdecadal variations of the frequency of these TCs; it tended to be more prior to the 1980 s than the time from early 1980 s to 2007. It mainly increased prior to the mid- 1980 s but generally decreased after it.（ 2） TCs can affect Doumen from April to December,with July,August and September being the months having the largest frequency and most serious effect.（ 3） The frequency of these TCs oscillates at a significant period of 2 to 3 years.（ 4） The intensity of these TCs varies at a significant period of 2 to 4 years but the long- term variation trend is not significant.（ 5） Both the frequency and intensity of these TCs are closely related with the SST and the WPSH;the SST affects the frequency and intensity by different marine zones,the area and westernmost point of the WPSH play some role in the frequency,and the ridge position and the location of its 588 dagpm contour are related with the intensity,of these TCs.
出处
《广东气象》
2016年第3期29-32,共4页
Guangdong Meteorology
关键词
气候学
热带气旋
海温
西太平洋副热带高压
斗门
tropical cyclone
sea surface temperature
western Pacific subtropical high
Doumen
