城市生态空间PM<sub>2.5</sub>削减效益研究——以北京市为例

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Abstract Based on the theory of spatial dependency in ecosystem service, a multiple linear regression was estimated, which used the data of land use and annual average PM_2.5 concentration of Beijing in 2000 and 2015, and took land-use grids of 30m*30m as the research unit. The average PM_2.5 concentration in ecological space was found to be 32.29% lower than that in non-ecological space. The result was subsequently adopted to analyze the function of ecological space to reduce PM_2.5 and its spatial dependency. Results revealed that ecological space in Beijing reduced the PM_2.5 concentration by 4.64 and 9.03μg/m³ in 2000 and 2015, respectively, and produced population health benefit amounting to 79.54~158.96 and 219.80~439.27million RMB; the performance of ecological space in reducing PM_2.5 concentration presented a spatial spillover effect, triggering converse responses depending on the land use type; and both the structure and scale affected the functioning of ecological space, with linear-structured ones outperforming planar-structured ones in terms of the non-ecological area being affected, pollutant concentration reduction as well as health benefit, and such competitive advantage grew with the scale of ecological space. Therefore, making sophisticated use of the spatial characteristic of ecological space helps in promoting the ecological benefit as well as the effective use of resources. Adding small, dot or linear-structured ecological space in the metropolitan areas could maximize the ecological benefit under the land constraint.

Key words： urban ecological space PM_2.5 health benefit spatial dependency land use

Received: 09 February 2021

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	WU Jian
	YANG Zi-han
	HU Lei

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WU Jian,YANG Zi-han,HU Lei. Effect and benefit of PM_2.5 reduction from urban ecological space: The case of Beijing[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(10): 4916-4925.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I10/4916

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