南京大学学报(自然科学版) ›› 2016, Vol. 52 ›› Issue (6): 989.
李佳慧1,2,刘红年1*,王学远1
Li Jiahui1,2,Liu Hongnian1*,Wang Xueyuan1
摘要: 利用南京大学城市空气质量预报模式(NJUCAQPS)研究苏州城市颗粒物和臭氧的相互作用,评估各效应对污染物的影响和冬夏两季相对重要性.研究表明冬季颗粒物的辐射效应造成模拟域向下短波辐射减小5.4%~22%,近地面气温降低0.25~0.48 ℃,湍能和风速减小,边界层高度降低,城区PM2.5、NO2、NO和SO2浓度分别增加1.01%、0.48%、1.58%和0.71%,O3浓度降低0.99%;颗粒物的光化学效应造成PM2.5、硫酸盐、硝酸盐、O3和NO浓度分别降低0.04%、0.07%、0.04%、4.33%和8.09%,NO2浓度升高3.59%;颗粒物的非均相效应造成PM2.5、硫酸盐、硝酸盐和NO浓度分别升高4.72%、22.07%、6.93%和2.59%,O3、NO2和SO2浓度分别降低5.05%、1.19%和11.38%.非均相效应对颗粒物、O3和SO2起主导作用;光化学效应对NO2和NO起主导作用.夏季各效应引起污染物浓度变化趋势与冬季相近,但夏季辐射效应对除O3外的NO2、NO和SO2影响程度加强,对颗粒物影响程度减弱;光化学效应对各污染物(除NO)的影响程度加强尤其对硝酸盐和硫酸盐;非均相效应对各污染物(除硝酸盐)的影响程度加强.
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