[Mechanisms of Three-dimensional Urban Morphology of Urban Block on Carbon Emissions].

Q2 Environmental Science
Jia-Cheng Wang, Lin-Min Zhang, Yuan Li, Zhi Cai, Hui Wen, Yu-Long Guo, Zhi-Qiang Zhang
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引用次数: 0

Abstract

Urban blocks are the basic unit of urban planning and fine management of carbon emissions. Investigating the interplay between urban morphology and carbon emissions holds notable implications for achieving carbon peak and carbon neutrality targets, as well as for urban sustainable development. However, most of the current research focuses on the regional and urban scales, and the influence mechanism of three-dimensional urban morphology on carbon emissions at the urban block scale remains unclear. Taking the main urban area of Hangzhou as an example, this study first estimated the spatial distribution of total urban carbon emissions at the scale of urban blocks by integrating nightlight, land use, and energy consumption data. Then, we calculated and superimposed the three-dimensional urban morphology indicators of these blocks and employed multiscale geographically weighted regression (MGWR) to explore the impact of block three-dimensional urban morphology on carbon emissions. The results showed that: ① The total CO2 emissions from urban blocks in Hangzhou's main urban area were 50.88 million tons, with an average CO2 emission intensity of 30 456.49 t·km-2 in 2020. ② The three-dimensional urban morphology of blocks exhibited four spatial distribution patterns: cohesive ring-layer pattern, outer high-inner low pattern, ring distribution pattern, and south high-north low pattern. This indicates that the central area of Hangzhou's main urban area had higher spatial compactness, whereas the outer areas exhibited greater spatial irregularity and complexity in buildings. ③ Spatial extension and spatial irregularity had a positive effect, whereas spatial complexity had a negative effect. Spatial compactness had a dual effect on carbon emissions.

城市街区三维城市形态对碳排放的影响机制
城市街区是城市规划和碳排放精细化管理的基本单位。研究城市形态与碳排放之间的相互作用对实现碳峰值和碳中和目标以及城市可持续发展具有重要意义。然而,目前的研究大多集中在区域和城市尺度上,三维城市形态对城市街区尺度上碳排放的影响机制尚不清楚。本研究以杭州主城区为例,首先通过整合夜光、土地利用和能耗数据,估算了城市街区尺度下城市碳排放总量的空间分布。然后,我们计算并叠加了这些街区的三维城市形态指标,并采用多尺度地理加权回归(MGWR)来探索街区三维城市形态对碳排放的影响。结果表明:①2020年杭州主城区城区街区CO2排放总量为5088万吨,平均CO2排放强度为30 456.49 t·km-2;②城市块体三维形态呈现四种空间分布格局:内聚环层格局、外高内低格局、环状分布格局和南高北低格局。这说明杭州主城区中心区域具有较高的空间紧凑性,而外围区域则表现出较大的空间不规则性和建筑复杂性。③空间伸展性和空间不规则性具有积极作用,而空间复杂性具有消极作用。空间紧凑性对碳排放有双重影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
环境科学
环境科学 Environmental Science-Environmental Science (all)
CiteScore
4.40
自引率
0.00%
发文量
15329
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