基于全生命周期的我国建筑业碳排放时空演化特征研究

Research on Spatiotemporal Evolution Characteristics of China's Construction Industry Carbon Emissions Based on Life Cycle

以生命周期理论为基础,计算2004-2018年我国建筑业全生命周期碳排放量,分析我国30个省份和三大地区建筑业全生命周期碳排放的时空演化特征和集聚效应。结果表明:1.2004-2018年我国建筑业全生命周期碳排放总量整体呈现出以2012年为分界点的“先急后缓”的增加趋势,三大地区的建筑业全生命周期碳排放趋势与全国较为相近;2.建筑业全生命周期碳排放空间分布呈现出由东部沿海向西部地区梯度递减分布的格局,全国一半以上的建筑业碳排放来自于东部地区;3.各省份建筑业全生命周期碳排放存在显著的空间正相关,但空间异质性特征趋于增强,碳排放集聚区存在两极分化特征,绝大多数省份处于高高(H-H)集聚区和低低(L-L)集聚区内。研究结论为中国建筑业低碳发展提供参考。

Based on the life cycle theory,this paper calculated the carbon emissions of the construction industry in China from 2004 to 2018,and analyzed the spatiotemporal evolution characteristics and agglomeration effects of carbon emissions of the construction industry in 30 provinces and three regions in China.The results show that:(1)From 2004 to 2018,the life cycle carbon emissions of the construction industry in China showed an increasing trend of"rapid at first and then slow down",with 2012 as the cutoff point.The life cycle carbon emission trend of construction industry in the three regions is similar to the whole country.(2)The spatial distribution of carbon emissions in the life cycle of construction industry presented a gradient decreasing pattern from the eastern coastal area to the western area.More than half of the country's carbon emissions from construction come from the eastern region.(3)There is a significant positive spatial correlation between the carbon emissions of construction industry in the life cycle of each province,but the spatial heterogeneity tends to strengthen.Carbon emission clusters have a polarization characteristic,with the vast majority of provinces located in high(H-H)and low(L-L)clusters.The conclusion provides reference for the low-carbon development of China's construction industry.