生物挥发性有机物对沈阳市夏季地表臭氧影响

The Impact of Biogenic Volatile Organic Compounds on Summertime Surface Ozone in Shenyang

臭氧的前体物分为氮氧化物和挥发性有机物,其中挥发性有机物分为人为挥发性有机物和生物挥发性有机物。基于沈阳市夏季臭氧连续污染现象,本文通过设定3个污染物排放情景,分析生物挥发性有机物在不同排放情景下对沈阳市臭氧的影响,采用CMAQ-DDM敏感性技术对BVOCs进行敏感性分析。研究表明,沈阳市夏季臭氧产生过程中,BVOCs有助于臭氧浓度升高,部分时间段会出现BVOCs对臭氧浓度造成负贡献的现象。本地BVOCs对臭氧浓度的贡献较小,外界BVOCs对臭氧浓度的贡献较大。

The precursors of ozone are divided into nitrogen oxides and volatile organic compounds(VOCs),with VOCs further categorized into anthropogenic VOCs and biogenic VOCs.Based on the continuous ozone pollution in Shenyang during the summer,this study examines the impact of biogenic VOCs on ozone in Shenyang under three different emission scenarios.Sensitivity analysis of BVOCs is conducted using CMAQ-DDM sensitivity technology.The research indicates that during the summer ozone production process in Shenyang,BVOCs contribute to an increase in ozone concentration,although there are instances where BVOCs negatively impact ozone concentration during certain time periods.Local BVOCs contribute less to ozone concentration,while external BVOCs have a larger impact on ozone concentration.