成渝经济区陆地植被碳储量动态及碳汇战略研究

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 km2和1 231.05 km2,林地增加了2 908.70 km2,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tC/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tC/a和933.87万tC/a,林地碳储量增加了1 724.81万tC/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.

Dynamics of Vegetation Carbon Reservesand Carbon Strategy in Cheng-Yu Economic Region

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 km2 and grassland 1 231.05 km2, and woodland increased by 2 908.70 km2.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 tC in 2000 to 435.515 million tC in 2007, with an annual average accumulation rate of 0.21%, and playing a role carbon sink.Cropland and grassland decreased 1.657 9 million tC/a and 9.338 7 million tC/a separately, and forest carbon storage increased 17.248 1 million tC/a.(3) The target of low carbon city was proposed as the city development goals based on the trend of carbon stock changes.