摘要
利用1970—2010年共41年清远市7个观测站点的地面观测资料,采用趋势分析等方法,对清远市高温天气的气候特征进行了统计分析。结果表明:清远市高温日数分布呈现出明显的由西北向东南递减的空间分布特征,并且南北差异明显,日数最多站(阳山站)月平均(夏季)高温日数是最少站(连山站)的3倍以上;从年代际总体变化趋势来看,清远市的高温日数呈现出逐渐增多的趋势。但有"两波一谷"的多波动不稳定变化趋势,20世纪80年代和2000年以后是高温天气的高发阶段,1997年是41年来的最少年,2009年是最多年。时间分布上集中在夏季的7—8月。
Using the surface observations from seven stations in Qingyuan from 1970 to 2010 （41 years） and with the method of tendency analysis, we made a statistical analysis of the climatologic characteristics of high-temperature weather in the city. The result is shown as follows. In the spatial distribution, the number of high-temperature days （ NHTD ） shows an obviously decreasing trend from the northwest to the southeast, with a large difference between the north and the south of the city such that the station with the maximum NHTD （ in Yangshan） is more than three times as many as that with the minimum （ in Lianshan）. For the overall trend of interdecadal variation, the NHTD gradually increases, though with unstable multiple waves, such as a pattern of ＂two peaks versus one valley＂. The 1980s and the post-2000 time witnessed frequent occurrence of high-temperature weather. For the 41 years, 1997 was the year with the least occurrence while 2009 the year with the most. The NHTD concentrates in July and August.
出处
《广东气象》
2017年第3期36-38,43,共4页
Guangdong Meteorology
关键词
气候学
高温
气候特征
清远市
climatology
high-temperature
climatologic characteristics
Qingyuan city
