MOZART-4大气化学模式模拟东亚季风对对流层污染物的影响:模式验证

Impact of East Asia Monsoon on Tropospheric Pollutant Using Global Chemical Transport Model(MOZART-4)

利用东亚酸沉降监测网(EANET)、WMO全球温室气体数据中心(WDCGG)的观测资料和TOMS、MODIS卫星观测资料,对MOZART-4大气化学输送模式进行了评估。结果表明,MO-ZART-4对东亚地区近地面二次污染物O3、一次污染物CO和CH4的模拟值与观测值具有较好的一致性,其中低纬海洋观测站的相关系数最高达到0.93,高纬Mondy站的相关系数最低,但也达到0.56;采用统计学相关性分析法检验了O3模拟值与观测值的总体相关性,三种检验方法均说明模拟值与观测值总体是相关的,且低纬海洋观测站的相关性最高。根据各观测站模拟值与观测值的相关性及地理位置等,将东亚划分为5个区,5个区域中对流层O3总量的模拟值与TOMS卫星观测值能够很好地匹配,但由于对流层顶的不确定性,使得模拟结果存在小的偏差。对比气溶胶光学厚度四季气候平均模拟结果与MODIS资料显示,模式能够模拟出卫星资料中东亚地区的高值区,模拟结果存在的偏差主要是模式排放源和模拟结果的分辨率较低以及某些地区特殊的地形导致的。

The global chemical transport model （MOZART-4） was evaluated using the data of EANET, WDCGG, TOMS and MODIS. The results showed that the values of simulating 03, CO and CH4 over East Asia matched the value of observation. The correlation coefficient at low latitude sites is 0.93, while the correlation coefficient at high latitude sites is the lowest, for 0.56. Three types of correla- tion analysis verifies the correlation of 03 between the simulation and observation. According to the correlation and the observation sites, East Asia region is divided into five areas. The simulation of volume 03 matches well the observation of TOMS. Because of the uncertainty of tropopause, the simulation has small deviation. The contrast of climatologically seasonal aerosol optical depth （AOD） between the simulation and the observation shows that the simulation reproduced the high value of the observation of TOMS over East Asia. The deviation results are from the low resolution of the emission and model and the special terrain in some areas.