本文利用1992年和2004年土地利用各类型面积数据计算分析了北京市土地利用变化情况，计算出北京市从1992年到2004年12年间，农用地面积减少了442650公顷，草地面积减少了2110.11公顷，林地面积增加了44059.87公顷，建设用地面积增加了64508.83公顷。土地利用结构也发生了改变，林地从1992年的37%增加到50%，农用地从34%减少到8%，建设用地从15%上升为25%。并通过使用《2006年IPCC国家温室气体排放清单指南》中提供的计算方法和相关系数缺省值，计算得到1992-2004年土地利用类型变化导致的植被碳储量总共增加了1441821.3吨碳/年，其中北京市的林地总共增加了2367797吨碳/年，草地总共增加了3589.297吨碳/年，农用地总共减少了929565吨碳/年。也计算了北京市各区的林地碳储量变化量。其中房山区的林地碳储量变化最大，增加了1157367.48（吨碳/年），其次是门头沟区和海淀区，分别为447728.58（吨碳/年）和309727.932（吨碳/年）；石景山区、平谷区和怀柔区的林地碳储量减少了，其中怀柔区减少的最多，为487555.44（吨碳/年）。其他区的林地碳储量都增加了，且都比较均衡。

In this paper, we calculated various types of land use data of Beijing in 1992 and 2004, and got the conclusion that, agricultural land’s area decreased 442,650 hectares, grassland a decrease of 2,110.11 hectares, forest’s area increased 44,059.87 hectares, and construction land increased 64,508.83 hectares. Land use structure has also changed, Forest increased from 37% in 1992 to 50%, agricultural land decreased from 34% to 8%, construction land increased from 15% to 25%. And by using the calculation methods and the correlation coefficient default values provided by"2006 IPCC Guidelines for National Greenhouse Gas emissions inventory", Calculated the 1992-2004 in vegetation carbon storage due to land use changes increased 1,441,821。3 tons of carbon / year, of which forest land increased 2,367,797 tons of carbon / year, grassland increase 3,589.297 tons of carbon / year, agricultural land reduced 929,565 tons of carbon / years. also calculated the change in carbon stocks of forest land of each district of Beijing, in which Fangshan District got the greatest changes in carbon stocks of forest land, an increase of 1,157,367.48 (ton carbon / year); Mentougou and Haidian District respectively 447,728.58 (ton carbon / year) and 309727.932 (tons carbon / year) ; The forest carbon of Shijingshan District, Pinggu and Huairou District got a decrease storage, and Huairou District, reduced the maximum of 487,555.44 (ton carbon / year). Other areas of forest carbon stocks are increased, and are more balanced.