Forest Carbon Storage And Carbon Sequestration Potential During 2010-2050 In China

As an important component of terrestrial ecosystem,forest occupies the dominant position in the terrestrial ecosystem carbon storage,and it is also the key factor to determine the carbon storage and carbon density in different regions.Based on the 7th(2004~2008)and 8th(2009~2013)national forest inventory data of China,we used IPCC volume-biomass methods to estimate the carbon stocks and carbon density of 31 China's provinces,municipalities and autonomous regions(due to data limitations,not including Hongkong,Macao and Taiwan area).Analysis the variations and age group characteristics of the carbon storage and carbon density in the natural arbor and artificial arbor in China during the phrase of two forest resources inventory;Comprehensive analysis and evaluate carbon sequestration capacity at different age groups of natural forests and artificial forest.To establish the accumulation of per unit area age groups logistic growth equation model of different regions and different dominant species.combined with growth target of the forest area and accumulation in 2020 and 2030 in our country and to predicte carbon sequestration potential from 2010 to 2050 years.The main conclusions are as follows:(1)The total carbon storage of forest trees in China is 6135.68 Tg,and the carbon density is 37.28 Mg /hm2.In different regions of China,the carbon storage are as follows: Southwest(2449.06 Tg)> Northeast(1282.04 Tg)> North China(660.28 Tg)> South China(632.53 Tg)> Central China(541.31 Tg)> Northwest(430.61 Tg)> East China(138.84 Tg)The forests area of Northeast and Southwest are the largest in China,and the accumulation of unit area,carbon density and carbon storage are also the largest.The carbon storage relatively large provinces are Tibet,Yunnan,Heilongjiang,Sichuan,Inner Mongolia and Jilin,every province account for more than 5% of the country,the six provinces' s carbon storage accounted for65.47% of national forest carbon storage.The carbon density relatively large provinces are Tibet,Xinjiang,Jilin,Sichuan,Yunnan,Qinghai,Hainan and Fujian,and their carbon density is greater than 39 Mg /hm2,higher than the national average level.(2)The amount of carbon storage at different age groups in China as follows:Middle-aged forest(1720.03 Tg)> Mature forest(1442.11 Tg)> Near mature forest(12.6529Tg)> Over-matured forest(924.93 Tg)> Young forest(783.32 Tg),they respectively accounted for total carbon storage of 28%,23%,21%,15% and 13%.And young forest and middle-aged forest area accounts for the total area of the forest 64.66%,it can predict that China forest vegetation carbon storage have great growth potential.the carbon density of forest in China is as follows: Young forest(14.69 Mg /hm2)< Middle-aged forest(32.38 Mg /hm2)>Near mature forest(48.99 Mg /hm2)< Mature forest(66.27 Mg /hm2)< Over-matured forest(87.43 mg / hm2),the greater the age group,the greater the carbon density.(3)During the two inventory period,The total carbon storage of forest in China increased from 5549.95 Tg to the 6135.68 Tg,increased 585.73 Tg,and the carbon density increased from35.67 Mg /hm2 to 37.28 Mg /hm2,increased 1.61 Mg /hm2.The carbon storage of natural forest and artificial forest increased by 206.82 Tg and 378.91 Tg respectively,and the carbon density increased by 1.83 Mg /hm2 and 2.52 Mg /hm2 respectively.(4)Analysis and forecast carbon storage of China's forest in the future,by 2050,carbon storage and carbon density of forest in china will reach 11329.17 Tg and 57.57 Mg /hm2,compared with 2010 increased by 85% and 54%.The carbon storage and carbon density of the existing forests respectively 10528.95 Tg and 63.97 Mg /hm2,carbon storage and carbon density of new afforestation will reach 800.22 Tg and 24.86 Mg /hm2.The existing forest trees are close to maturity,the carbon storage growth rate slowdown,but new afforestation carbon density is also low,there is a large potential for growth.