成渝经济区陆地植被碳储量动态及碳汇战略研究

Dynamics of Vegetation Carbon Reserves and Carbon Strategy in Cheng-Yu Economic Region

利用卫星遥感数据,对2000年-2007年间成渝经济区耕地、森林和草地等陆地植被的碳储量进行了估算。结果表明:(1)7年间耕地和草地分别减少了2 388.89 km^2和1 231.05 km^2,林地增加了2 908.70 km^2,其中耕地主要转出为林地和建设用地,草地转出主要为林地和耕地;(2)7年间成渝经济区碳储量呈逐渐增加的趋势,共增加了625.16万t C/a,年增长率为0.21%。其中耕地、草地碳储量分别减少了165.79万t C/a和933.87万t C/a,林地碳储量增加了1 724.81万t C/a。(3)结合碳储量变化的趋势,提出了以打造低碳城市为目标的成渝经济区碳汇战略。

Land cover change has remarkable effects on ecosystem carbon storage. In order to estimate the carbon dynamic changes from 2000 to 2007,remote sensing images（TM） in 2000 and 2007 of Cheng-Yu Economic Region（CYER） were used to calculate the extent of different land cover types. The results showed：（1） During the period 2000-2007,area of cropland decreased by 2 389. 89 km^2 and grassland 1 231. 05 km^2,and woodland increased by 2 908. 70 km^2. The decreased cropland was converted to woodland and construction,the decreased grassland was converted to woodland and cropland.（2） the carbon storage in increased from 430. 190 million t C in 2000 to 435. 515 million t C in 2007,with an annual average accumulation rate of0. 21%,and playing a role carbon sink. Cropland and grassland decreased 1. 657 9 million t C/a and 9. 338 7 million t C/a separately,and forest carbon storage increased 17. 248 1 million t C/a.（3） The target of low carbon city was proposed as the city development goals based on the trend of carbon stock changes.