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地理科学  2014 

基于地表能量平衡的城市热环境遥感研究——以石家庄市为例

, PP. 338-343

Keywords: 城市热环境,感热通量,潜热通量,人为热

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Abstract:

对石家庄市LandsatTM数据进行土地覆被分类,计算各土地覆被类型的能量平衡分量。找出感热、潜热、储热通量在下垫面的分配差异并分析下垫面面积比例与感热/净辐射的关系。发现密集不透水面感热单位面积能量达314.1W/m2,49.9%的净辐射转换为感热。城市植被、水体净辐射的61.2%,65.9%变成潜热;感热/净辐射与城市植被和水体面积比例负相关,面积比例小于30%,感热/净辐射随之减少而快速增长;大于30%则随之增加缓慢降低。感热/净辐射与不透水面面积比显著正相关,可见,城市近地层温度升高主要由不透水面产生的感热交换引起。

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