Measuring urban thermal environment from accessibility-based perspective:A case study in a populous city

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外文摘要：Understanding the spatial interaction among residents,cooling service,and heat risk area in complex urban areas is conducive to developing targeted management. However,traditional urban thermal environment assessments typically relied on simple linear integration of associated indicators,often neglecting the spatial interaction effect. To explore the spatial interaction among the three elements,this study proposes an accessibility-based urban thermal environment assessment framework. Using Zhengzhou,a rapidly urbanizing city,as an example,remotely sensed images from three periods (2010,2015 and 2020) were applied to extract urban green space (UGS) and hot island area (HIA). An improved two-step floating catchment area (2SFCA) method and bivariate local Moran's I were employed to explore whether residents' clustering locations are more likely to access cooling service or to be exposed to heat risk. The results demonstrate that the UGS in the city has been expanding,whereas the HIA shrank within the inner city in 2015 and then increased in 2020. Even though the urban thermal environment may have improved in the last decade,the spatial interaction among the residents,cooling service and heat risk area could be exacerbated. Spatial autocorrelation shows an increase in locations that are disadvantageous for resident congregation. Even when sufficient cooling services were provided,residents in these areas could still be exposed to high heat risk. The developed urban thermal environment framework provides a novel insight into the residents' heat risk exposure and cooling service accessibility,and the findings could assist urban planners in targeting the improvement of extra heat exposure risk locations.

外文关键词：

Urban heat islandUrban green spaceAccessibilityRemote sensingSpatial autocorrelation analysis

作者：

Xinyu Dong、Xiaoya Li、Yanmei Ye、Dan Su、Runjia Yang、Angela Lausch

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作者单位：

Department of Land Management,Zhejiang University,Hangzhou 310058,China

Department of Computational Landscape Ecology,Helmholtz Centre for Environmental Research-UFZ,Leipzig 04318,Germany

Landscape Ecology Lab,Geography Department,Humboldt-Universität zu Berlin,Berlin 10099,Germany

Department of Physical Geography and Geoecology,Martin Luther University Halle-Wittenberg,Halle 06120,Germany

Department of Architecture,Facility Management and Geoinformation,Anhalt University of Applied Sciences,Dessau 06846,Germany

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基金：

Major Project of the National Social Science Foundation of ChinaNational Natural Science Foundation of China Projects

项目编号：

19ZDA08872204101

出版年：

2024

DOI：

10.1016/j.geosus.2024.02.004

地理学与可持续性(英文)

ISSN：

年,卷(期)：2024.5(3)