项目名称: 南京大气复合污染条件下亚微米粒子数谱分布及增长特征研究
项目编号: No.41305135
项目类型: 青年科学基金项目
立项/批准年度: 2014
项目学科: 天文学、地球科学
项目作者: 安俊琳
作者单位: 南京信息工程大学
项目金额: 25万元
中文摘要: 亚微米气溶胶的粒径分布及增长特征对正确理解大气气溶胶在气候效应,城市灰霾形成的原因以及气溶胶对人类健康的影响等方面的研究具有重要的科学意义。目前研究工作主要集中在对气溶胶的数谱分布的观测上,而对新粒子生成和增长过程中,各类前体物对其变化影响并没有进行深入的讨论,哪些物种起着关键性的作用,仍没有确切的回答和解释。本研究将在深入分析亚微米粒子数谱分布特征的基础上对城市典型污染气体气态硫酸和低挥发性有机蒸汽对新粒子增长影响机制进行系统性研究。研究工作通过对观测到的大量新粒子生成事件的分析,结合气象条件以及气溶胶前体物气态硫酸、低挥发性有机蒸汽浓度等相关数据,计算新粒子生成中的特征参数,总结高污染区域新粒子生成事件形成的条件及其演变特征,探究不同前体物在新粒子形成、增长过程中的作用,揭示新粒子生成在不同发展条件下的差异。
中文关键词: 南京;气溶胶;雾霾;新粒子生成;气溶胶数浓度
英文摘要: Submicron aerosol particle size distribution and growth characteristics of correct understanding of atmospheric aerosol on climate effect, the reason for the formation of urban haze and influence of aerosols on human health research has important scientific significance. Current research mainly focus on the number of aerosol spectrum distribution of aerosol observation, and in the process of new particle formation and growth process, influence of various precursors of their change is not in-depth discussions, which species plays a key role, still no definitive answer and explanation. In this study, based on in-depth analysis of the spectrum distribution characteristics of submicron particle number of a systematic study of the typical urban pollution gases gaseous sulfuric acid and low-volatile organic vapors on the new particle growth impact mechanism.Research by analyzing a large number of new particle formation events on observed, combined with meteorological conditions and gaseous sulfuric acid, low-volatile organic vapor concentration data, computing the characteristic parameters of new particle formation, summed up the new particle high pollution area generated events forming condition and evolution characteristics, explore the different precursor the formation, growth effect in the process of new particles
英文关键词: Nanjing;Aerosol;Haze;New particle formation;Aerosol number concentration