Estimation of storage heat flux in an urban area using ASTER data
Estimation of storage heat flux in an urban area using ASTER data
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DOI：
10.1016/j.rse.2007.02.011
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发表时间：
2007-09-14
影响因子：
13.5
通讯作者：
Yamaguchi, Yasushi
中科院分区：
文献类型：
--
作者：
Kato, Soushi;Yamaguchi, Yasushi
城市热岛现象的发生是人为排热、增加使用人工不透水表面材料和减少植被覆盖等综合影响的结果。这些因素改变了地表的热平衡，最终提高了大气温度。重要的是要量化的表面热平衡，以估计这些因素的贡献。本文提出了利用卫星遥感数据进行热量平衡分析时，用地表热量通量来表示地表与冠层内部之间的热量通量。利用Terra ASTER数据和气象数据估算了日本名古屋市周围的地表热通量。利用2000年7月10日和2004年1月2日白天以及2003年9月26日夜间的ASTER数据，比较了热平衡的季节和昼夜差异。在中心商业区和商业区，存储热通量高于周围的居民区。特别是在冬季，中心城区的热通量为240 ~ 290 W m（-2），远大于居民区的热通量（180 ~ 220 W m（-2））。中心城区的负蓄热热通量在夜间较大。这种趋势意味着城市地表在白天储存热量，并在夜间释放热量。由于工厂的巨大能源消耗，无论白天还是夜间，工业区都出现了极大的负蓄热热流。2007年爱思唯尔公司All rights reserved.
The urban heat island phenomenon occurs as a result of the mixed effects of anthropogenic heat discharge, increased use of artificial impervious surface materials, and decreased vegetation cover. These factors modify the heat balance at the land surface and eventually raise the atmospheric temperature. It is important to quantify the surface heat balance in order to estimate the contributions of these factors. The present authors propose the use of storage heat flux to represent the heat flux between the land surface and the inside of the canopy for the heat balance analysis based on satellite remote sensing data. Surface heat fluxes were estimated around the city of Nagoya, Japan using Terra ASTER data and meteorological data. Seasonal and day-night differences in heat balance were compared using ASTER data acquired in the daytime on July 10, 2000, and January 2, 2004 and in the nighttime on September 26, 2003. In the central business and commercial districts, the storage heat flux was higher than those in the surrounding residential areas. In particular, in winter, the storage heat flux in the central urban area was 240 to 290 W m(-2), which was much larger than the storage heat fluxes in residential areas, which ranged from 180 to 220 W m(-2). Moreover, the negative storage heat flux in the central urban area was greater at night. This tendency implies that the urban surface stores heat during the daytime and discharges it at night. Extremely large negative storage heat flux occurred primarily in the industrial areas for both daytime and nighttime as a result of the enormous energy consumption by factories. 2007 Elsevier Inc. All rights reserved.