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本文利用2005-2013年林业统计年鉴中每个省市新造林面积和遥感分类提取得到的2010年土地覆被类型,结合公开发表的各类森林生长方程和各个时期的森林存活率,估算了中国新造林在2005-2100年生物量碳库变化及其固碳潜力。结果表明:2005-2013年中国新造林面积达到4394×10~4hm~2,在自然生长状况下,到2020年新造林蓄积量增加16.8亿m~3,生物量增加1.6 Pg,生物量碳库0.76 Pg C;新造林生物量碳库在2005-2100年中将增加2.11 Pg C,相当于目前现有森林生物量碳库的25%,约是过去20年森林总碳汇的1.5倍;新造林生物量碳密度逐年增加,最高达到48.1 Mg/hm~2。整合林业统计年鉴以及遥感解译的森林类型对新造林生物量固碳潜力分析,研究表明新造林具有较大的碳汇潜力,对中国现有森林碳汇平衡有重要贡献。
Based on the 2010 types of land cover extracted from the new afforestation area and remote sensing classification of each province and municipality in the Forestry Statistical Yearbook 2005-2013 and the published forest growth equations and the forest survival rates in different periods, Biomass C stocks change and carbon sequestration potentiality of new afforestation in 2005 to 2100. The results showed that from 2005 to 2013, the area of new afforestation in China reached 4394 × 10 ~ 4hm ~ 2. Under the condition of natural growth, the volume of new afforestation increased by 1.68 billion m 3 and the biomass increased by 1.6 Pg in 2020. The biomass carbon pool 0.76 Pg C; The carbon stocks of newly reforested biomass will increase by 2.11 Pg C from 2005 to 2100, which is equivalent to 25% of the current forest carbon stocks, about 1.5 times of the total forest carbon sequestration over the past 20 years. New The carbon density of afforestation biomass increased year by year, up to 48.1 Mg / hm ~ 2. Integration of forestry statistical yearbook and remote sensing interpretation of forest types of carbon sequestration potential of new afforestation biomass, studies have shown that the new afforestation has greater potential for carbon sinks, the balance of existing carbon sequestration in China an important contribution.