摘要
探究城市热岛效应的变化趋势对于城市可持续发展具有重要意义。以河北省三河市为研究区域,基于Landsat 8遥感数据,应用单窗算法反演地表温度,并结合目视解译与叠加分析方法,系统分析城市绿地与地表温度之间的关系。研究结果显示,2014—2020年,三河市热岛效应变化明显,高温区主要集中在居民区和高校周边。归一化植被指数(normalized difference vegetation index,NDVI)与地表温度呈显著负相关,NDVI值越高,冷岛效应越显著;绿地面积与地表温度亦呈负相关,但二者关系并不线性;绿地周长与地表温度之间的相关性较弱,仅在样本量较大时才显现微弱联系。总体而言,绿地对周边区域具有一定的降温作用,但其降温范围受多种因素共同影响,绿地面积与降温范围相关性不显著,单一增加绿地面积并不能直接扩大降温覆盖范围。研究结果可为城市绿地规划与热环境调控提供科学参考。
Exploring the variation trends of urban heat island(UHI)effects is critically important for sustainable urban development.UHI characteristics of Sanhe City,Hebei Province were investigated,using Landsat 8 satellite imagery.Land surface temperature(LST)was retrieved via the single-window algorithm,and visual interpretation and overlay analysis were employed to examine the relationship between urban green spaces and LST.The results show that from 2014 to 2020,the UHI effect in Sanhe undergoes significant changes,with high-temperature zones mainly distributed in residential and university areas.The normalized difference vegetation index(NDVI)is found to be negatively correlated with LST,and stronger cooling effects are observed in areas with higher NDVI values.Although green space area also shows a negative correlation with LST,the relationship is non-linear.The correlation between green space perimeter and LST is weak and becomes noticeable only when the number of samples is sufficiently large.Overall,green spaces have a cooling effect on surrounding areas;however,the extent of this effect is influenced by multiple factors.There is only a weak correlation between green space area and cooling range,indicating that simply increasing green space area does not directly expand the extent of temperature reduction.These findings provide scientific insights for urban green space planning and heat environment mitigation.
作者
王梓菡
温少妍
邓淼
单新建
WANG Zi-han;WEN Shao-yan;DENG Miao;SHAN Xin-jian(School of Earth Sciences,Institute of Disaster Prevention,Sanhe 065201,China;State Key Laboratory of Earthquake Dynamics,Beijing 100029,China;Institute of Geology,China Earthquake Administration,Beijing 100029,China)
出处
《科学技术与工程》
北大核心
2026年第3期914-925,共12页
Science Technology and Engineering
基金
中央高校基本科研业务费专项(ZY20240221)
地震科技星火计划(XH25056YA)
国家自然科学基金青年科学基金(42504012)
地震动力学国家重点实验室资助项目(LED2023B08)
国家自然科学基金面上项目(42274014)
新疆天山英才科技创新团队项目(2024TSYCTD0014)。
关键词
地表温度
植被覆盖度
热岛效应
绿地
三河市
surface temperature
vegetation cover
heat island effect
green space
Sanhe City
