MATCH对中国地区2006年气溶胶光学厚度分布特征的模拟研究

A Modeling Study with MATCH on the Aerosol Optical Depth Distribution over China in 2006

利用2006年NCEP/NCAR再分析资料驱动大气化学传输模式MATCH(Model of Atmos-pheric Transport and Chemistry),模拟了中国地区气溶胶光学厚度的分布及其季节变化特征,并与MODIS(MODerate resolution Imaging Spectro-radiometer)卫星产品MOD08_M3和中国太阳分光观测网CSHNET(the Chinese Sun Hazemeter Network)的观测资料进行了对比和验证。在此基础上,研究得出,2006年中国的华北、华中和华南地区是气溶胶光学厚度的高值区,青藏高原和东北地区是低值区。在中国的华北、华中、华南和西南等大部分地区,硫酸盐气溶胶产生的光学厚度所占的比重较大,其次为有机碳气溶胶,黑碳气溶胶和海盐气溶胶所占比重较小。

The Model of Atmospheric Transport and Chemistry（MATCH） is used in this work to simulate the spatial distribution and seasonal variation of AOD（λ=550nm） over China in 2006,by taking NCEP/NCAR reanalysis data as its meteorological input.The AOD obtained by MATCH is then compared with the MODIS（MODerate resolution Imaging Spectro-radiometer） satellite data and the CSHNET（the Chinese Sun Hazemeter Network） observational data.The comparison of the results in this work with MOD08M3 indicates that MATCH has the basic ability to simulate the AOD variability over China region.The correlation coefficient between the simulation and the observational data is 0.693（with α〈0.0001）.The simulated results in this work show that the AOD over China varies greatly with different regions and seasons.The higher value of AOD occurred in North China,Central China and South China,whereas the lower values of AOD are mainly located in Northwest China,Northeast China and Tibetan Plateau.The AOD over China is mainly generated by sulfate aerosol,secondly by organic aerosol,and the least by black carbon and sea-salt aerosol.