摘要
利用2000—2020年达州市逐日气温资料和Landsat卫星遥感数据,分析了达州市主城区近20年城市热岛效应的年、季节变化特征和植被覆盖情况,并对热岛效应的影响因素进行初步探讨。结果表明:近20年,达州市热岛效应整体上呈上升趋势,热岛强度的增长率为2.48℃/100 a,热岛强度均值为0.454℃;各季节中夏季的热岛效应最强,增长率为3.36℃/100 a,热岛强度均值为0.553℃;热岛效应最弱的为春季,增长率为1.43℃/100 a,热岛强度均值为0.457℃;达州市植被覆盖率呈下降趋势,尤其是主城区下降较为明显;达州市热岛效应的产生及变化的影响因素复杂多样,不仅受到自然因素的影响,更受到城市化进程中人类活动的影响。
Based on the daily temperature data and Landsat satellite remote sensing data in Dazhou City from 2020 to 2024,the annual trend and seasonal variation characteristics of the urban heat island effect and vegetation coverage in the main urban area of Dazhou City over the past 20 years were analyzed and discussed,and the influencing factors of the urban heat island effect were explored.The results show that the urban heat island effect in Dazhou City has generally shown an upward trend in the past 20 years,and among all seasons,the increase is the most obvious in summe,with a growth rate of 3.36℃per 100 years and a mean intensity of 0.553℃.In contrast,the weakest heat island effect is in spring,with a growth rate of 1.43℃per 100 years and a mean intensity of 0.457℃.There has been a decline in vegetation coverage in urban areas.The influencing factors of the occurrence and change of the heat island effect are complex and diverse,which are not only affected by natural factors such as natural landform,geographical location,and climatic conditions,but also affected by activities associated with urbanization.such as urban development and construction.
作者
杨刚
陈秋宇
唐海峰
陈可
夏菲
YANG Gang;CHEN Qiuyu;TANG Haifeng;CHEN Ke;XIA Fei(Dachuan District Meteorological Service,Dazhou 635000,China)
出处
《高原山地气象研究》
2025年第S1期86-90,共5页
Plateau and Mountain Meteorology Research
关键词
达州
热岛效应
变化特征
Dazhou
Heat island effect
Variation characteristics
