粤北地区暑期体感温度及其等级分布特征

On Apparent Temperature of Summer Breaks in Northern Guangdong and Characteristics of Its Grade Distribution

根据粤北地区31个国家气象观测站1965—2018年暑期7、8月逐日气象数据,采用线性回归、GIS技术和相关行业标准,研究了粤北地区暑期体感温度时空变化及其等级分布特征。结果表明:粤北地区近54年暑期体感温度没有明显升高或降低的趋势,暑期体感温度与平均气温、平均相对湿度呈显著的正相关关系,与平均风速成不显著的负相关关系,平均气温、平均相对湿度的上升会导致体感温度上升。体感温度随地形变化特征显著,200 m以下的低海拔山区体感温度普遍超过29℃,但高于1 200 m的高海拔山区体感温度小于20.5℃,各舒适度等级占全区总面积的比例:最舒适为4.6%、舒适为6.35%、较舒适为31.77%、较不舒适为57.28%。

Based on daily meteorological data for the summer breaks of July and August from 1961 to 2018 from 31 national meteorological observation stations in northern Guangdong and with the use of linear regression and GIS technique and relevant industrial standards,this paper studies the spatiotemporal variations of apparent temperature in the summer breaks and the characteristics of their grade distribution in this part of the province.The result is shown as follows.For the 54 years studied,there are no trends of significant increases or decreases in the apparent temperature of summer breaks in northern Guangdong.While it is positively correlated with mean temperature and mean relative humidity significantly,it is negatively correlated with mean wind speed insignificantly.The rise of mean temperature and mean relative humidity will lead to the increase of apparent temperature.Apparent temperature varies so significantly with terrain that it is generally more than 29℃in areas at altitudes less than 200 m but it is less than 20.5℃in mountainous areas at altitudes more than 1200 m.The ratio of the most comfortable grade takes up 4.6%of the total area of northern Guangdong,followed by 6.35%for the comfortable,31.77%for the relatively comfortable and 57.28%for the relatively uncomfortable grades.