MICS亚洲阶段II -对气雾剂模块的灵敏度
MICS Asia Phase II - Sensitivity to the aerosol module
摘要：
在模式间比较研究-亚洲第二阶段（MICS 2）的框架下，在东亚地区比较了8个模式，本文研究了不同参数化的气溶胶模块上的硫酸盐和硝酸盐的PM10气溶胶浓度的影响。2001年3月，使用用于相互比较的模型之一的气溶胶模块的不同配置进行气溶胶浓度的室内比较。执行模型配置的参考设置的单个修改，并与参考情况进行比较。这些修改涉及的尺寸分布，即部分的数量，和物理过程，即凝结，冷凝/蒸发，云化学，多相反应和海盐排放。比较不同站点的月平均浓度，首先评估每个参数化的重要性。据发现，硫酸盐浓度是不太敏感的海盐排放量和冷凝是否计算动态或假设热力学平衡。硝酸盐浓度对云的化学性质不太敏感。然而，观察到对非均相反应的非常高的灵敏度。此后，使用不同的化学传输模型（CTM）的气溶胶浓度的变化和变化的气溶胶模块中使用不同的参数化进行比较。对于硫酸盐，在气溶胶模块中使用不同参数化的可变性低于使用不同CTM的可变性。然而，对于硝酸盐，对于四个站的月平均浓度，这两个变量具有相同的数量级。
英文摘要：
In the framework of the model inter-comparison study - Asia Phase II (MICS2), where eight models are compared over East Asia, this paper studies the influence of different parameterizations used in the aerosol module on the aerosol concentrations of sulfate and nitrate in PM10. An intracomparison of aerosol concentrations is done for March 2001 using different configurations of the aerosol module of one of the model used for the intercomparison. Single modifications of a reference setup for model configurations are performed and compared to a reference case. These modifications concern the size distribution, i.e. the number of sections, and physical processes, i.e. coagulation, condensation/evaporation, cloud chemistry, heterogeneous reactions and sea-salt emissions. Comparing monthly averaged concentrations at different stations, the importance of each parameterization is first assessed. It is found that sulfate concentrations are little sensitive to sea-salt emissions and to whether condensation is computed dynamically or by assuming thermodynamic equilibrium. Nitrate concentrations are little sensitive to cloud chemistry. However, a very high sensitivity to heterogeneous reactions is observed. Thereafter, the variability of the aerosol concentrations to the use of different chemistry transport models (CTMs) and the variability to the use of different parameterizations in the aerosol module are compared. For sulfate, the variability to the use of different parameterizations in the aerosol module is lower than the variability to the use of different CTMs. However, for nitrate, for monthly averaged concentrations averaged over four stations, these two variabilities have the same order of magnitude.
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