碳中和背景下城市碳汇功能及提升策略——以沈阳核心区为例

Urban Carbon Sink Function and Promotion Strategy under the Background of Carbon Neutrality——A Case Study of Shenyang Core Area

城市是碳排放产生的主要地域空间,是进行“碳中和”核算与政策制定的主体。除了减少固定能源与交通碳排放外,增加城市碳汇也是实现“碳中和”的重要手段。通过分析沈阳三环区域城市碳汇(植被、土壤、水系、建筑物)不同组成部分的碳汇能力,估算出城市碳汇固碳量为430.93万t,能够抵消沈阳市年能源消耗产生CO;的7.34%。在明晰城市碳汇固碳机理、固碳潜力及其空间分布特征的基础上,提出增加固碳面积与提升碳密度两方面的城市碳汇功能提升策略,旨在为中国低碳规划与碳中和实现提供理论指导与技术支撑。

Cities are the main geographical space where carbon emissions are generated and the main body of"carbon neutrality"accounting and policy formulation.In addition to reducing carbon emissions from stationary energy and transportation,increasing urban carbon sinks is also an essential method to achieve carbon neutrality.By analyzing the carbon sink capacity of different components of the city’s carbon sinks(vegetation,soil,water system,buildings)inside the third ring road area of Shenyang,it is estimated that the amount of carbon sequestration in the city’s carbon sink is 4.3093 million tons,which can offset 7.34%of the CO;produced by Shenyang’s annual energy consumption.Based on the carbon sequestration mechanism,carbon sequestration potential and spatial distribution characteristics of the city’s carbon sinks,the strategies to improve the function of urban carbon sinks are proposed from two aspects including optimization of spatial pattern:increasing carbon sequestration area and increasing carbon density.The aim is to provide theoretical guidance and technical support for the realization of China’s low-carbon planning and carbon neutrality.