湖南省碳源与碳汇变化的时序分析

在全球气候变暖的背景下，减少温室气体排放、发展低碳经济成为各地区在发展中的普遍共识。以湖南省为研究区域，以1995~2008年为研究时序，从能源消费、主要工业产品生产工艺过程、土地利用变化与牲畜管理、固体废弃物处理与废水处理和排放4个方面综合分析了碳源与碳汇的变化情况。研究表明:1995~2008年，湖南省温室气体排放总量约在220亿t（2000年）至399亿t（2008年）CO2当量之间，14 a间增长了6118%，年均增长374%；碳汇总量约在1754亿t（1995年）至2537亿t（2007年）CO2当量之间，14 a间增长了3607%，年均增长约240%；能源消费与农业部门是湖南省温室气体的主要来源，林地是湖南省碳汇的主要来源；综合碳源与碳汇变化的均衡结果，1995~2008年湖南省呈碳汇盈余状态，净碳汇在2001~2007年持续增加，14 a间增长了31.94%，年均增长2.15%

TIMING ANALYSIS OF THE CHANGE OF CARBON SOURCE AND CARBON SINK IN HUNAN PROVINCE

Under the background of global warming,to reduce greenhouse gas emissions and develop low-carbon economy has become the general consensus of all regions in the process of development.Taking Hunan Province as study region,the paper gave a comprehensive analysis of the change of carbon source and carbon sink during 1995~2008 from the aspects of energy consumption,the main industrial products technology processes,land use change and livestock management,and solid waste management and waste water management and emission.The results showed that,the total greenhouse gas emissions was between 0.22 billion tons(in 2000) and 0.399 billion tons(in 2008) carbon dioxide equivalent during 1995~2008,and increased by 61.18% with an average annual growth rate of 3.74%.Meanwhile,the total carbon sink was between 1.754 billion(in 1995) and 2.537 billion(in 2007) tons carbon dioxide equivalent during 1995~2008,and increased by 36.07% with an average annual growth rate of 2.40%.The main carbon source is energy consumption and from the sector of agriculture,and the forest is the main carbon sink source.The integrated results of the carbon source and carbon sink showed that,the capacity of carbon sink exceeded the amount of greenhouse gas emissions during 1995~2008;and the net capacities of carbon sink continued to grow during2001~2007,it increased by 31.94% with an average annual growth rate of 2.15% in 14 years.