摘要
基于新耦合气溶胶气候模式FGOALS-f3-L模拟分析了2002-2011年青藏高原地区气溶胶时空分布特征.结果表明:青藏高原地区,沙尘,硫酸盐,碳质气溶胶(包括黑碳,有机碳和混合碳)地表质量浓度分别占比为53.6%,32.2%,14.2%;在拉萨站点,模拟的气溶胶地表质量浓度被低估,尤其是黑碳和有机碳气溶胶;模拟的气溶胶光学厚度(AOD)时空分布与卫星观测结果较为一致,均方根误差和偏差分别为0.081和0.036;由于模式中沙尘排放参数化的不确定性,模式对AOD的模拟效果在夏季和秋季优于春季.
This study presents the simulated aerosol spatiotemporal characteristics over the Tibetan Plateau(TP)with a newly developed coupled aerosol-climate model(FGOALS-f3-L).The aerosol properties are simulated over the TP for the period 2002-11.The results indicate that soil dust,sulfate,and carbonaceous aerosols(black carbon(BC),organic carbon(OC)and BC/OC)account for 53.6%,32.2%,and 14.2%of the total aerosol mass over the TP,respectively.The simulated aerosol surface mass concentrations and aerosol optical depths(AODs)are evaluated with ground-based and satellite observations,respectively.Underestimations of the aerosol surface mass concentration are found at the Lhasa site,especially for BC and OC.The spatial distribution and interannual variation of AOD are consistent with MODIS observations,with the RMSE of 0.081 and bias of 0.036.Due to the uncertainty of the parameterization of dust emissions,the model’s performance in summer and autumn is much better than that in spring.
基金
financially supported by the National Natural Science Foundation of China grant Nos.41875133
41590875
41605083
the Youth Innovation Promotion Association CAS grant No.2020078
the Strategic Priority Research Program of the Chinese Academy of Sciences grant No.XDA2006010302。
