贵州森林碳汇现状及增汇潜力分析

区域层面的森林碳收支估算研究有利于为整体层面持续固碳增汇的森林经营提供科学参考,评估森林碳汇对减少区域内碳排放的贡献。采用温室气体清单估算法,对2000、2005和2010年贵州省森林碳汇进行估算,结果表明:贵州省森林碳汇从15.380×106增长到22.447×106、24.314×106 t CO2,呈稳定增长趋势,占全省碳排放量的6.73%～10.35%。贵州省尚有161.70×104 hm2宜林地,如果能用于发展碳汇林业,每年可吸收CO2达2.379×106 t,30年内将吸收CO2达71.370×106 t。贵州省正处于碳排放增长阶段,相对于森林碳汇而言,全区域碳减排工作任重道远,森林碳汇能力有很大的提升空间。

Current Status of Forest Carbon Sinks in Guizhou Province and Their Increasing Potential

Forest carbon estimates in regional levels benefit forest management aiming of overall level carbon fixation and increase.They can be used to evaluate the contributions of forest carbon in reducing regional carbon emissions.Based on the estimate method of greenhouse gases inventory,we estimated forest carbon sinks in Guizhou Province at year 2000,2005 and 2010,respectively.Results show that,forest carbon in Guizhou increased to 22.4(in year 2005) and 24.3(year 2010) from,15.4 million t CO2(year 2000),implying a stable growth trend.These forest cabon account for 6.73%～10.35% of the total provincial carbon emissions.There are 1.617 million hectors suitable land for forest in Guizhou.If these lands could be used to develop carbon forestry,they could absorb 2.379 million t CO2 every year,in total 71.37 million t in future 30 years.Guizhou Province is in a stage of carbon emission growth;it therefore has a very hard way to reduce carbon emission concerning the forest carbon sink.The potential ability of increasing forest carbon sink is significantly strong in this area.