The Correlation Between Ecosystem CO₂Uptake And Variation Of Atmospheric CO₂Concentrations In The Grassland

Grassland ecosystem is one of the important types of terrestrial ecosystems in the world.Grassland ecosystem carbon cycle research play an important role in the global carbon cycleresearch. In the past, we were lack of regional atmospheric CO2concentrations observed datato allows us to absorb CO2grassland vegetation changes in atmospheric CO2concentrationand its role in the process of the lack of adequate knowledge. With the GOSAT satellite whichis the first one to start distributing global atmospheric CO2data,we could analyzes changes inthe concentration of atmospheric CO2uptake relationship with grassland ecosystems provideimportant data source for our study. In this study, our test region are the North American andEurasian steppe grasslands.At the same time, we collected NIES released FTS-SWIR L2XCO2data, NASA released MODIS NDVI, NPP Global1°×1°grid monthly mean data,and GEOS-Chem atmospheric transport model analog GOSAT satellite two hours aftercrossing the mean atmospheric CO2concentration data.We used analytical methods to studythe ecosystem vegetation absorbs CO2and CO2concentration in the atmosphere characteristicparameters to build multiple linear regression equation to analyze the ecological vegetationabsorbs CO2and atmospheric CO2concentration transform correlation. The results showedthat CO2absorbed by vegetation grassland ecosystem to reduce atmospheric CO2concentration has a significant role in the area of grassland carbon sequestration potential.Compared with GEOS-Chem atmospheric transport model simulation results, we cananalysis and evaluate the GOSAT satellite observations of atmospheric CO2concentrationresults uncertain. The results showed that, GOSAT satellite observations with GEOS-Chemmodel simulations bias is1.8ppm, seasonal changes bigger than GEOS-Chem modelsimulation results. GOSAT satellite observations can accurately reflect changes in atmospheric CO2concentration ecosystem conditions.The grassland ecosystem NDVI, NPP and GOSAT-XCO2multiple linear regressionanalysis showed that the CO2concentration in the atmosphere NPP was strongly negativecorrelation, especially in summer, with the increase in NPP values, atmospheric CO2concentration decreased significantly. Description of ecological grassland vegetation absorbsCO2has an important influence on the atmospheric CO2concentration.The use of spatial and temporal characteristics of regional atmospheric CO2concentrationand grassland ecosystems absorb CO2comparative analysis of the atmospheric CO2concentration by further evidence of ecosystem CO2uptake, showing a seasonal variation.Vegetation strong CO2absorption region, the atmospheric CO2concentration is lower than inother regions. Eurasian steppe vegetation ecology absorption shows greater role than theNorth American prairie effects of atmospheric CO2concentration on the Eurasian steppe havea stronger role in carbon sequestration. But to be accurate, quantitative analysis ofatmospheric CO2concentration further study and Vegetation interaction processes need to beabsorbed.