Cooling Extent of Green Parks: A Case Study in Beijing

Abstract:

Cooling effects of green areas are an effective way to mitigate the urban higher temperature caused by urban heat islands. The cooling extent goes beyond a green area’s boundary and extends into its surrounding area. However, measurement of the exact cooling extent and mechanism of such effects had remained unclear. Using Landsat Enhanced Thematic Mapper Plus (ETM+) images of Beijing, we have determined the lower temperature of green cooled areas by land surface temperature, identified green areas’ cooling extents, and evaluated the relation of cooling extents to green areas’ features. Results show that the total size of extended cooled areas is larger than that of total green areas, and the cooling extents and magnitudes are statistically related to the biomass, size and shape of green areas. This study has demonstrated the calculation of cooling extents, and provided an approach to the assessment of cooling effects.

• Periodical: Advanced Materials Research (Volumes 962-965)
• Pages: 2005-2017
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.962-965.2005
• Online since: June 2014
• Authors: Wen Qi Lin*, Xiang Qi Chang, Na Yan, Ting Yu
• Keywords: Cooling Extent, Effect Assessment, Green Area

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