摘要
基于北京市第七次至第九次(2004—2018年)森林资源连续清查数据,采用生物量扩展因子法,评估北京市乔木林的碳储量与碳密度在不同城市功能分区的分布与变化情况。结果表明,在3个清查期内,北京市的乔木林总碳储量分别为5.74、6.72和10.45 Mt,其中幼龄林和中龄林占比最高,两者占到同期总碳储量的60.88%、64.12%和59.62%。在区域分布上,生态涵养发展区乔木林的碳储量占比最高,3期分别达到64.01%、59.86%和63.64%,其次为城市发展新区,占比分别为23.53%、30.39%和26.67%。全市乔木林碳密度在3个清查期分别为11.38、11.23和14.19 t/hm 2。分区碳密度大小依次为首都功能核心区>城市功能拓展区>城市发展新区>全市平均值>生态涵养发展区。北京市乔木林的碳汇能力总体呈增长趋势,但中龄、幼龄林占比高,碳储量重点分布区的碳密度偏低,应持续开展森林精细化抚育管理,尤其是要加强生态涵养发展区乔木林的提质增效,有效增加乔木林资源的整体碳汇功能。
Based on the forest inventory data of Beijing from the seventh to ninth times(2004—2018),the biomass expansion factor method was used to evaluate the distribution and change of carbon storage and carbon density of arbor forests in different urban functional zones in Beijing.The results showed that during three forest inventory periods,the arbor forest carbon storage in Beijing was 5.74,6.72 and 10.45 Mt,the young and middle age forests accounted for 60.88%,64.12%and 59.62%of the total carbon storage in the same period.In terms of regional distribution,the ecological conservation development area accounted for the highest proportion of the total carbon storage,reached 64.01%,59.86%and 63.64%,followed by the urban development area,accounting for 23.53%,30.39%and 26.67%,respectively.The average carbon density of arbor forest in Beijing was 11.38,11.23 and 14.19 t/hm 2 in the three inventory periods.The order of carbon density of different functional zones was capital functional core area>urban functional expansion area>new urban development area>average level of the city>ecological conservation development area.In conclusion,the carbon sink capacity of arbor forest in Beijing showed an increasing trend,but the proportion of the young forest and the middle age forest was relatively high,and the carbon density in the key distribution areas was still low.Therefore,forest refined management should be carried out continuously,especially to enhance the quality and efficiency of arbor forest in ecological conservation development area,and effectively increase the overall carbon sink ability of arbor forest resources.
作者
韩艺
张峰
HAN Yi;ZHANG Feng(Beijing Forestry Carbon and International Cooperation Center,Beijing 100029,China)
出处
《林业调查规划》
2023年第5期26-31,共6页
Forest Inventory and Planning
基金
中国工程院咨询研究项目(2018-ZD-13-03)
中国工程院生态文明建设若干战略问题研究咨询项目(2014HXFWLXY008).
关键词
碳储量
碳密度
生物量扩展因子
功能分区
北京市
carbon storage
carbon density
biomass expansion factor
functional zone
Beijing
