前驱气体对大气细微粒浓度变化影响的研究  

Modeling the Response of Ambient Aerosols to Changes in Precursor Concentrations

作　　者：林锐敏 陈亲莹 

机构地区：[1]高雄第一科技大学环境与安全卫生工程系

出　　处：《中国粉体技术》2009年第2期27-31,共5页China Powder Science and Technology

摘　　要：重点研究以台湾地区高屏空品区的大寮、美浓、及左营测站为研究标地，以ISORROPIA热力学平衡模式仿真，假设气溶胶形态为稳定状态或亚稳定状态．且有无包含地壳元素，比较仿真结果与实际测量值之间的差异，以了解气溶胶形态为稳定或亚稳定状态下，气溶胶的变化反应。模式效能评估结果显示，在亚稳定状态及有包含地壳元素条件下，其仿真效果最好，且此条件也是较接近实际的环境状态。通过以大寮、美浓及左营测站为标地，以亚稳定状态及有包含地壳元素条件进行讨论，结果显示，在不同季节及不同地区，影响PM2.5浓度的最主要前驱污染物皆不同。此外，PM2.5临界值的结果显示，其前驱污染物对PM2.5浓度变化影响呈现非线性反应及非正比的关系。Based on the ambient aerosol data obtained from southern Taiwan, the response of inorganic aerosols to changes in precursor concentrations was calculated with applying the inorganic aerosol model ISORROPIA. Comparing the predictions of ISORROPIA with the observations, the predicted and measured NH4^＋,NH3 and NO3^- generally presented good correlation at study sites when the aerosols were assumed to be in the stable or metastable. Contrarily, the predicted and measured HNO3 presented poor correlation. The estimated response of inorganic PM2.5 to changes in precursor concentrations was affected by the inclusion of crustal species in some cases, although average responses were comparable with and without crustal species. When the aerosols were assumed to be in the metastable, the lowest bias and error were achieved for the modeling. The results showed that when the aerosols were assumed to be in the metastable and the crustal species were included, the simulation effect was the most, and the modeling conditions actually approached to the environmental conditions. Changes in sulfate and nitrate are expected to lead to proportional reductions in inorganic fine particulate matter. However,calculation of marginal PM2.5 in this study showed the response of ambient aerosols to changes in precursor concentrations presented a non-linear response.

关 键 词：热力学平衡 前驱气体 大气悬浮颗粒 

分 类 号：X513[环境科学与工程—环境工程]