| 河源市城区高温炎热的气候特征分析 |
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| 引用本文： | 魏璐,周晓湘,郑菲菲.河源市城区高温炎热的气候特征分析[J].广东气象,2020(2):17-21. |
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| 作者姓名： | 魏璐 周晓湘 郑菲菲 |
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| 作者单位： | 河源市气象局 |
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| 摘 要： | 利用东源县和紫金县国家气象站1978-2018年的逐日气象数据,分析了河源城区高温和炎热天气特征。结果表明:河源城区总高温日数、一般高温日数和重高温日数均呈明显增加趋势,无严重高温日。总高温日数存在4~5、8~9和准15年时间尺度的周期变化。常年首次在5、6月出现高温日;高温炎热日出现次数最多在7、8月份;极端年最高气温介于36.2~39℃。炎热日数以0.26 d/年速率明显增加,同一个炎热临界值,相对湿度增大,对应的最高气温会降低。炎热日数与热岛效应强度之间存在显著性的相关关系。高温炎热过程主要受副热带高压控制、热带气旋外围下沉气流和El Niňo事件影响。
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| 关 键 词： | 气候学 高温日数 炎热日数 河源市 |
An Analysis of the Climatological Characteristics of High-temperature and Extremely Hot Weather in Urban Heyuan |
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| WEI Lu,ZHOU Xiao-xiang,ZHENG Fei-fei.An Analysis of the Climatological Characteristics of High-temperature and Extremely Hot Weather in Urban Heyuan[J].Journal of Guangdong Meteorology,2020(2):17-21. |
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| Authors: | WEI Lu ZHOU Xiao-xiang ZHENG Fei-fei |
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| Institution: | (Meteorological Bureau of Heyuan City,Heyuan 517000) |
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| Abstract: | Using the day-to-day meteorological data of national observation stations in the counties of Dongyuan and Zijin from 1978 to 2018,this paper analyzes the characteristics of high-temperature and extremely hot weather in the urban districts of Heyuan.The result is shown as follows.The numbers of all high-temperature days,mild high-temperature days and severe high-temperature days all showed trends of significant increase,while that of very severe high-temperature days was absent.The number of all high-temperature days varied periodically at temporal scales of 4 to 5,8 to 9 and quasi-15 years.For the average year,the high-temperature days first appeared in May or June.The high-temperature and extremely hot days appeared the most in July and August.Extreme annual maximum highest temperatures were between 36.2 and 39℃.The number of extremely hot days increased significantly at a rate of 0.26 d/year.For the same threshold of extremely hot weather,the greater the relative humidity,the lower the associated highest temperature.The number of extremely hot days was significantly correlated with the intensity of heat island effect.The process of high-temperature and extremely hot weather was mainly governed by subtropical highs and affected by the descending air flow at the periphery of tropical cyclones and the El Niňo event. |
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| Keywords: | climatology number of high-temperature days number of extremely hot days Heyuan City |
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