Satellite-measured characteristics and changes of urban heat island of Nanjing City Zone, China

Ranran Wang; Youpeng Xu

doi:10.1117/12.760776

26 July 2007 Satellite-measured characteristics and changes of urban heat island of Nanjing City Zone, China

Ranran Wang, Youpeng Xu

Proceedings Volume 6752, Geoinformatics 2007: Remotely Sensed Data and Information; 675227 (2007) https://doi.org/10.1117/12.760776
Event: Geoinformatics 2007, 2007, Nanjing, China

Abstract

Satellite images in the thermal infrared can be used for assessing the thermal urban environment as well as for defining heat islands in urban areas. In this study, characteristics and changes of surface urban heat island (SUHI) of Nanjing City Zone, China are examined using satellite images provided by the Landsat TM/ETM+ sensor respectively in 1988 and 2001. The individual characteristics are analyzed from clustering and grading images transformed from brightness temperature maps. SUHI changes of the 13 years are demonstrated by comparing a series of changing images. And both the characteristics and changes are quantified by SUHI index (SUHII) calculated from SUHI index system, which is originally built in this paper, totally basing on the remote sensing data. Additionally, a flow chart explaining the overall SUHI analysis processes is made up. The study reveals that from 1988 to 2001, both intension and extension of the SUHI effect in Nanjing City Zone have enhanced greatly and the SUHII increasing from 0.1568 to 0.8432 incorporates with the qualitative analysis, which proves that the SUHI index system is doable in practice.

Citation Download Citation

Ranran Wang and Youpeng Xu "Satellite-measured characteristics and changes of urban heat island of Nanjing City Zone, China", Proc. SPIE 6752, Geoinformatics 2007: Remotely Sensed Data and Information, 675227 (26 July 2007); https://doi.org/10.1117/12.760776

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