区域性光化学模式与LLA-C机制的模拟性能比较

Comparison of Simulation Capacity of a Simplified Regional Photochemical Reaction Mechanism with the LLA-C Mechanism

以 Ｌ Ｌ Ａ－ Ｃ 机制为基准，在［ Ｎ Ｍ Ｈ Ｃ］／［ Ｎ Ｏ＃ － ｘ］ 比率分别为１７９ 、７１４ 、２８６ 条件下测试了区域性光化学模式（ Ｒ Ｏ Ｓ） 的模拟性能。结果表明 Ｒ Ｏ Ｓ 模式在上述三种初值条件下均能从总体趋势上给出与 Ｌ Ｌ Ａ － Ｃ 机制相似的结果， 但只有当非甲烷烃浓度较高（［ Ｎ Ｍ Ｈ Ｃ］／［ Ｎ Ｏｘ］ ＞ １２） 时 Ｒ Ｏ Ｓ 模式模拟值与 Ｌ Ｌ Ａ－ Ｃ 机制预测值比较接近。在这种条件下， Ｒ Ｏ Ｓ 模型对 Ｏ Ｈ 的预测值有待改进。我国大气中相当高的［ Ｎ Ｍ Ｈ Ｃ］／［ Ｎ Ｏｘ］ 比率说明 Ｒ Ｏ Ｓ 模式用于全国范围内的空气质量趋势模拟是可行的。

We have compared the modelling capacity of a simplified regional atmospheric chemistry model (ROS) with the LLA-C mechanism under the conditions of [NMHC]/[NO x]=1.79, 7.14, and 28.6. The result indicates that the ROS model can show the general trend of changes in the concentration of O 3, NO 2, NO, PAN, OH, HNO 3, and so on under the three scenarios, but the concentration of O 3, NO 2, NO, and PAN except OH predicted by the ROS model can be approximated by the LLA-C mechanism only when the initial ratio is greater than 12. Considerably high ratios between NMHC and NO x in most areas of China suggest that the ROS model is applicable for regional air quality modelling in China.