Achieving the goal of“dual carbon”involves two main aspects:carbon emission reduction and carbon sequestration.As key entities in carbon accounting and policy making,cities should not only monitor their carbon emiss...Achieving the goal of“dual carbon”involves two main aspects:carbon emission reduction and carbon sequestration.As key entities in carbon accounting and policy making,cities should not only monitor their carbon emissions,but also give due consideration to their carbon sequestration functions.Based on a systematic review of carbon sequestration accounting methods applicable to different types of cities,the total carbon sequestration within the Third Ring Road of Shenyang is estimated to be 4.42 million tons,which offsets approximately 7.92%of the carbon emissions from energy consumption in the same year.The study analyzes the basic principles of carbon sequestration by different types of carbon sinks in urban ecosystems,such as vegetation,soil and buildings,and reveals significant spatial variation in their distribution.Specifically,vegetation carbon density increases progressively from the city center to the urban periphery,whereas soil and building carbon density exhibit a decreasing trend.Urban ecosystem carbon sequestration is influenced by land use types,with notable differences in both carbon sequestration and carbon density across different land use types.Natural carbon sinks display relatively consistent characteristics,while artificial carbon sinks show marked variability.Among all land use types,residential land contributes the highest carbon storage,while industrial land demonstrates the highest carbon density.By exploring the interactions among urbanization,land use types,and urban carbon sinks,this study elucidates the characteristics of urban ecosystem carbon sequestration.The findings provide a scientific basis for enhancing urban carbon sink capacity,realizing the value of carbon sequestration,and advancing the goal of urban carbon neutrality.展开更多
基金financially supported by the Scientific Research Platform Construction Project of Key Laboratory of City Information and Spatial Perception in Liaoning Province(No.LJ232410153071)Joint Science and Technology Program Natural Science Fund of Liaoning Province(No.2024-BSLH-263)National Natural Science Foundation of China(No.52378063)。
文摘Achieving the goal of“dual carbon”involves two main aspects:carbon emission reduction and carbon sequestration.As key entities in carbon accounting and policy making,cities should not only monitor their carbon emissions,but also give due consideration to their carbon sequestration functions.Based on a systematic review of carbon sequestration accounting methods applicable to different types of cities,the total carbon sequestration within the Third Ring Road of Shenyang is estimated to be 4.42 million tons,which offsets approximately 7.92%of the carbon emissions from energy consumption in the same year.The study analyzes the basic principles of carbon sequestration by different types of carbon sinks in urban ecosystems,such as vegetation,soil and buildings,and reveals significant spatial variation in their distribution.Specifically,vegetation carbon density increases progressively from the city center to the urban periphery,whereas soil and building carbon density exhibit a decreasing trend.Urban ecosystem carbon sequestration is influenced by land use types,with notable differences in both carbon sequestration and carbon density across different land use types.Natural carbon sinks display relatively consistent characteristics,while artificial carbon sinks show marked variability.Among all land use types,residential land contributes the highest carbon storage,while industrial land demonstrates the highest carbon density.By exploring the interactions among urbanization,land use types,and urban carbon sinks,this study elucidates the characteristics of urban ecosystem carbon sequestration.The findings provide a scientific basis for enhancing urban carbon sink capacity,realizing the value of carbon sequestration,and advancing the goal of urban carbon neutrality.
