Simulation Of The Amount Of Vegetation Absorbed Carbon Dioxide And Temporal And Spatial Variation In China From 2000 To 2013

The CO2 concentration in the atmosphere has increased year by year, caused environmental and ecological problems by the greenhouse effect, ecosystem change, as the source and sink of atmospheric CO2, terrestrial ecosystem carbon cycle is an important link in the global carbon cycle and plays an important role in the global climate change. Terrestrial ecosystem plays a role not to be ignored for the change of CO2 concentration in the atmosphere up in the vast area and vegetation diversity of China. In this paper, using the latest data and relevant parameters, the reference to domestic and foreign newest research result, on the basis of green plant photosynthesis to carbon dioxide in the atmosphere as the basic principle of fixed organic carbon, with RS、GIS of remote sensing platform as a means of treatment, 2000~2013 years China land green vegetation were evaluated in detail using the net to absorb carbon dioxide C-FIX model, concluded that China terrestrial vegetation net absorption of total annual interannual variations of CO2 fluctuated upward trend, and the south-east China than other parts of the country;the highest total vegetation net CO2 uptake in summer, followed by autumn and spring, and lowest in winter; net absorption of carbon dioxide in the most concentrated in June, July, August September; in most provinces of Inner Mongolia autonomous region, Heilongjiang province, Sichuan province of Yunnan province and the Guangxi autonomous region, at least for the Beijing, Tianjin, Ningxia autonomous region, Shanghai and the Hong Kong special administrative region;The national vegetation net absorption amount of carbon dioxide per unit area provinces is the highest in Hainan Province, Taiwan Province, at least Xinjiang Uygur Autonomous Region, the country most of the provinces 2000~2013 annual net CO2 uptake showed an increasing trend, in which Yunnan and Xinjiang increased most, Sichuan, Inner Mongolia, Tibet, the Guangxi times; only 3 areas of Heilongjiang, Shanghai, Hong Kong net CO2 uptake was reduced, which reduces the maximum amount of Heilongjiang. From the rate of increase, the increase rate of the largest Ningxia, far more than other provinces, Xinjiang, Gansu, the Tibet times, the other provinces to increase rate is less than 30%; Shanghai city as the net carbon dioxide absorption to reduce the amount of the highest rate of. Look from the coefficient of variation, Zhejiang, Jilin vegetation net absorbs carbon dioxide change is relatively stable, coefficient of variation below 0.03, Ningxia, Xinjiang and other regions of Qinghai net carbon dioxide absorption changes are volatile, coefficient of variation of maximum of Ningxia region, at 0.22, Hong Kong due to the geographical position is narrow, the vegetation coverage is low, so the variation coefficient is bigger also. Vegetation total absorption of large amount of carbon dioxide, its release carbon dioxide, the greater the breathing were very significant correlation between the two, and southern provinces to release carbon dioxide accounts for the proportion of the total amount is high in the north; due to the national land area from 2000 to 2013 in radiation temperature of NDVI and overall have different levels of atmospheric CO2 concentration increased, so are all lead to the entire increase in China’s land vegetation to absorb carbon dioxide, and proved it through three control experiment. The CO2 concentration in the atmosphere has become the leading factors affecting China land vegetation to absorb carbon dioxide increase.This paper proves that the area of land ecosystem of China net CO2 uptake showed an upward trend, to a certain effect to increase global carbon dioxide, net CO2 uptake to express the spatial distribution of intuitive, and a detailed analysis of the whole ecological system(soil and vegetation) net CO2 uptake quantity size and its change the reason for the increase in carbon dioxide, for further study and the environmental problems caused by offers of help, for the assessment of environmental quality, environmental planning and sustainable development goals are to provide a reference value.