O3查算表的建立及其在区域空气质量模式中的应用

利用光化学机制RADM2、CBM-Z建立箱模式,分析了影响O3生成的主要物理、化学因子,将这些因子进行分档计算,建立了能够描述光化学反应中O3及其前体物(挥发性有机物VOC、氮氧化物NOx)浓度变化的查算表,并在区域空气质量模式CALGRID中加以应用.通过对2006年1、4、7、10月珠江三角洲的模拟计算和比较分析表明,查表法显著提高了计算效率,运算时间减少45%~48%,并且与光化学机制直接耦合计算结果符合较好,其中基于RADM2的查算表对O3模拟效果较好,而基于CBM-Z的查算表对NOx模拟更佳.

Establishment of look-up table for ozone and its application in regional air quality model

Key physical and chemical factors in formation of O3 were studied with photochemical mechanism RADM2 and CBM-Z. Using the box model with various combinations of these factors, the look-up table was produced to depict the concentration variation of O3 and its precursors(VOC, NOx). The look-up table was applied in regional air quality model CALGRID to simulate tropospheric ozone over Pearl River Delta in January, April, July and October, 2006. It is found that employing look-up table scheme could significantly increase the computational efficiency, saving 45%~48% operation time. Meanwhile, the results coincided well with those calculated directly by photochemical mechanism. O3 and NOx were well simulated using look-up table based on RADM2 and CBM-Z, respectively.