西安夏季地表温度时空演变特征Spatial evolution characteristics of summer surface temperature in Xi'an city
陈秋计,杭梦如,郭昭
摘要(Abstract):
针对单一地表特征参数在研究地表覆盖类型对地表温度的影响中存在的局限性问题,以西安市区为研究对象,Landsat TM/OLI影像为数据源,采用单窗算法进行地表温度反演计算,获得西安市主城区1992至2018年中4期夏季地表温度数据。在此基础上,分析了1992—2018年西安市夏季地表温度时空变化特征,并利用剖面线分析法揭示了研究区LST与NDMI、IBI的内在关系。研究结果表明:在26年间西安市主城区夏季地表温度经历了"平缓上升、快速上升、有效降低"的变化过程;西安市夏季地表温度的空间分布与城市扩张方向相一致;地表温度与NDMI呈显著负相关,而与IBI呈显著正相关的关系,表明城市扩张人工建筑面积的增加是导致地表温度的升高的原因之一,并且有效的绿化措施和水体湿地的运用可对其周边环境带来一定的降温效果。
关键词(KeyWords): 地表温度;NDMI;IBI;西安市;时空演变特征
基金项目(Foundation):
作者(Author): 陈秋计,杭梦如,郭昭
DOI: 10.16251/j.cnki.1009-2307.2020.11.020
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