城市绿地碳汇测算方法研究进展

Research Progress in Carbon Sink Measurements for Urban Green Space

全球气候变暖加剧、“双碳”目标的提出、城市碳排的增加,使得固碳增汇的任务刻不容缓。城市绿地作为重要的碳汇来源,能有效改善城市环境、缓解碳汇压力、提升生态效益,维持碳氧平衡。由此评估碳汇效益,估算碳汇能力,对实现碳的可视化管理和碳中和目标具有推动作用。文章在梳理样地清查法、软件模拟法、遥感反演法、涡度相关法4种城市绿地碳汇测算方法原理的基础上,归纳并比较了4种方法的应用规模与优缺点,最后,从完善测算体系与指导规划实践两方面对城市绿地碳汇测算方法的发展趋势进行展望。

It is extremely urgent to sequestrate carbon and enhance carbon sink in the context of the intensification of global warming,the introduction of the“dual carbon”goals,and the increase in urban carbon emissions.As an important source of carbon sink,urban green spaces can effectively improve the urban environment,alleviate the pressure on carbon sequestration,enhance ecological efficiency,and maintain carbon-oxygen balance.Resultingly,the assessment of carbon sink benefits and estimation of carbon sink capacity are instrumental in realizing carbon visualization management and carbon neutrality.The paper reviews the rationales of 4 carbon sink measurement methods that are used in urban green space,i.e.,sample inventory method,software simulation method,remote sensing inversion method,and eddy correlation method,and summarizes and compares the scales of their application,advantages and disadvantages.At the end,the development trend of the carbon sink measurements for urban green spaces is discussed,focusing on the constant improvement of the measurement system and provision of guidance for planning and practices.