The Study Of Atmospheric CO₂Transport Based On HYSPLIT Model

Atmospheric carbon dioxide (CO2) is a long-life gas, its increasing concentrationwill lead to a rise in temperature and cause changes in the environment. There arethree ways to get the atmospheric CO2concentration in present: Ground surface siteobservations, satellite data inversion and atmospheric transport model which basedsimulation. Although the observation site has higher precision than others, but it islimited by the cost of the instrument factors, maintenance and site density constraints,it does not have the range of the statistical properties. Based on the observation ofremote sensing satellite data inversion to obtain CO2concentration is a new way, atpresent, the Japanese GOSAT satellite is the only world’s greenhouse gases observingsatellite, to obtain CO2concentration to provide a guarantee. With the gradualincrease of the algorithm, the accuracy of GOSAT observation satellites is also rising.The Institute paper uses atmospheric transport model GEOS-Chem model (v9-01-01)to simulate the global CO2concentration distribution in2010.The main conclusions of this paper are the following.By model simulation data and GOSAT satellite observation data retrievalcompared to year2010, GOSAT satellite data throughout the year is lower2.7ppmthan GEOS-Chem model data of CO2concentration in2010. but the two sets of datato reflect seasonal variation of atmospheric CO2concentration is consistent.Compacting GOSAT satellite Kriging after China region data and GEOS-Chemmodel simulation data results, identify two concentrations of the abnormal area whichcontains the Yangtze River Delta region to determine the coordinates of the center(Kunshan) Sichuan Basin region and the Yangtze River Delta region, according to thisarticle, use HYSPLIT model to simulate the trajectory of the center point arithmetic,and visualization.The simulated trajectory vector operation, the probability of their occurringwithin0.5°×0.5°grid computing, and generate probability plots. Analysis of2010Kunshan backward trajectory probability distribution.The results of the simulation cluster computing, based on the Total Spacevariance (TSV) while the smallest classification with the principle of representation,all trajtories will be divided into four categories, namely, the northern long-distancetransport, transport distance southwest, southeast middle distance and local transport short-distance transport. The proportion was29%,17%,18%and36%.Combined CO2concentration real-time data for analysising, the impact of fourtypes of air masses what arrive the target area are high. With the influence of acontinental air mass, trace gas concentration target area more evenly, the averageconcentration of CO2were391.7258and391.3001ppm; With the influence of marineair masses, CO2gas concentrations were lower for390.8129ppm, the local air massunder the influence, the average concentration of CO2is391.7808ppm. Air massaffecting Thus, the larger the target area by local Source, relatively speaking, a littleclean air masses from the ocean of some. Board Type4according to the air masscorresponding to the concentration of CO2, the CO2source is mainly determined bythe area of land, in particular short-distance local transport stream trajectory caused.Through simulation and analysis methods for airflow trajectory, we can come toits intuitive determine the source of CO2, can be targeted for energy conservation, soas to achieve the purpose of energy saving.