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The Heterogeneity of Air Temperature in Urban Residential Neighborhoods and Its Relationship with the Surrounding Greenspace

1,2, 1,2,*, 1,2 and 3
1
State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, No. 18 Shuangqing Road, Beijing 100085, China
2
University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China
3
Beijing University of Civil Engineering and Architecture, Zhanlanguan Road, Beijing 100044, China
*
Author to whom correspondence should be addressed.
Remote Sens. 2018, 10(6), 965; https://doi.org/10.3390/rs10060965
Received: 18 April 2018 / Revised: 13 May 2018 / Accepted: 13 June 2018 / Published: 16 June 2018
(This article belongs to the Special Issue Remote Sensing of Urban Ecology)
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Abstract

The thermal environment in residential areas is directly related to the living quality of residents. Therefore, it is important to understand thermal heterogeneity and ways to regulate temperature in residential neighborhoods. We investigated the spatial heterogeneity and temporal dynamics of air temperatures in 20 residential neighborhoods within the 5th ring road of Beijing, China. We further explored how the variations in air temperature were related to the patterns of the surrounding greenspace at different scales. We found that: (1) large air temperature differences existed among residential neighborhoods, with hourly maximum differences in air temperature reaching 5.30 °C on hot summer days; (2) not only the percentage but also the spatial configuration (e.g., edge density) of greenspace affected the local air temperature; and (3) the effects of spatial greenspace patterns on air temperature were scale dependent and varied by season. For example, increasing the proportion of greenspace in surrounding areas within a 100-m radius and increasing the edge density within radii from 500 to 1000 m could lower air temperatures in summer but not affect air temperatures in winter. In addition, decreasing the edge density of greenspaces within a 100-m radius of the surrounding areas would lead to an increase in air temperature in winter but not affect the air temperature in summer. These results extend our understanding of thermal environments and their relationships with greenspace patterns at the microscale (i.e., residential neighborhoods). They also provide useful information for urban planners to optimize greenspace patterns under better thermal conditions at the neighborhood scale. View Full-Text
Keywords: urban heat island (UHI); urban greenspace; high-resolution remote sensing; edge density; spatial configuration; scale; landscape design; thermal environment urban heat island (UHI); urban greenspace; high-resolution remote sensing; edge density; spatial configuration; scale; landscape design; thermal environment
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Qian, Y.; Zhou, W.; Hu, X.; Fu, F. The Heterogeneity of Air Temperature in Urban Residential Neighborhoods and Its Relationship with the Surrounding Greenspace. Remote Sens. 2018, 10, 965.

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