珠海市高温天气变化趋势及其与台风的关系

探讨采用1962—2018年间珠海市日最高气温数据,运用Mann—Kendall检验和小波分析方法,统计珠海市高温天气日数变化,并探讨高温天气的出现与台风位置和强度的关系。结果表明:(1)珠海市高温天气主要集中在7和8月;高温日数在1989年发生突变,高温日数增多,另外高温日数的周期也存在变短的趋势。(2)在珠海市出现的高温天气中,伴随台风的高温天数占43.1%,该比例在1990年之后显著减小。(3)伴随台风的高温天数在1990年之后呈现出增多的趋势,这主要是由于福建省和江西省热带低压至热带风暴级别和台湾海峡至台湾省一带台风级别的台风数量增多造成的。(4)当台风在福建省至台湾省一带活动时,珠海市出现高温天气概率较高。

On the Variation Tendency of High-temperature Weather in Zhuhai and Its Relationship with Typhoons

Using the data of highest daily air temperature of Zhuhai from 1962 to 2018 and the methods of Mann-Kendall test and wavelet analysis,this work statistically studies the variation of high-temperature weather days and examines the relationship between the occurrence of high-temperature weather and the position and intensity of typhoons.The result is shown as follows.(1)In the city,high-temperature weather mainly occurs in July and August.The number of high-temperature days abruptly increased in 1989 and its period tended to shorten.(2)The number of high-temperature days associated with typhoons takes up 43.1%of the high-temperature weather in Zhuhai and the percentage drops significantly after 1990.(3)The tendency for the high-temperature days associated with typhoons tends to increase after 1990,mainly due to the increase of typhoons at the intensity of tropical depression and tropical storm in the provinces of Fujian and Jiangxi and at the intensity of typhoon from the Taiwan Strait to the province of Taiwan.(4)When the typhoon is active in the provinces of Fujian and Taiwan,the probability for the high-temperature weather to occur in Zhuhai is relatively high.