A comparison of the performance of four air quality models for the Southern Oxidants Study episode in July 1999
A comparison of the performance of four air quality models for the Southern Oxidants Study episode in July 1999
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DOI：
10.1029/2005jd007021
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发表时间：
2007-03-10
影响因子：
4.4
通讯作者：
Kumar, N.
中科院分区：
文献类型：
--
作者：
Bailey, E. M.;Gautney, L. L.;Kumar, N.
为研究对流层空气质量问题而设计的模拟系统必须同时处理几个问题：臭氧、颗粒物、沉积和能见度。这些模拟系统由三个部分组成：气象、排放和空气质量。对1999年7月南方氧化剂研究进行了模拟，以评估一个这样的模拟系统，Models-3。气象部分MM5的性能根据观测结果进行了评估。通过比较两种排放模型Smoke和EPS 2.5的输出，评价了它们的一致性。为了进行比较，对CMAQ和另外三个模型(CMAQ-马德里1、CMAQ-马德里2和REMSAD)在同一时间段的性能进行了评估。对CMAQ和CMAQ-马德里1进行了32公里和8公里网格的嵌套模拟。CMAQ-马德里2和REMSAD的结果仅适用于8公里网格。对PM及其成分、臭氧和湿沉积的性能进行了评估。PM2.5及其组件的模型性能差异最大的是OC和总PM2.5；其他组件的性能更一致。对于PM2.5及其组件，32公里网格上的模型性能总体上好于8公里网格上的模型性能。NH4+和EC的R-2值在20%到50%之间，其他PM2.5组分的R-2值较低，表明模型对PM2.5的预测能力有限。当使用60ppb的截止值时，臭氧的模型性能符合EPA对MNB和MNE的指导，并且在8公里网格上比在32公里网格上更好。湿法沉积性能良好。
Modeling systems that are designed to investigate tropospheric air quality concerns must address several issues simultaneously: ozone, particulate matter, deposition and visibility. These modeling systems consist of three components: meteorology, emissions and air quality. A simulation was conducted for the July 1999 Southern Oxidants Study to evaluate one such modeling system, Models-3. Performance of the meteorological component, MM5, was evaluated against observations. Consistency of two emissions models, SMOKE and EPS 2.5, was evaluated by comparing their outputs. For comparison, the performance of CMAQ and three additional models (CMAQ-MADRID 1, CMAQ-MADRID 2, and REMSAD) was evaluated for the same time period. Nested simulations for a 32-km and an 8-km grid were conducted for CMAQ and CMAQ-MADRID 1. Results for CMAQ-MADRID 2 and REMSAD are available only for the 8-km grid. Performance was evaluated for PM and its components, ozone and wet deposition. Differences in model performance for PM2.5 and its components were greatest for OC and total PM2.5; performance was more consistent for the other components. Model performance was generally better on the 32-km grid than the 8-km grid for PM2.5 and its components. R-2 values ranged from 20 to 50% for NH4+ and EC and were lower for other PM2.5 components, indicating that the predictive capabilities of the models for PM2.5 are limited. Model performance for ozone met EPA guidance for MNB and MNE when a 60 ppb cutoff was used and was better on the 8-km grid than on the 32-km grid. Performance for wet deposition was good.