徐永福课题组 - Prof. YongFu Xu's Reasearch Group @ IAP CAS

综述:实验室模拟研究大气二次有机气溶胶的形成

组内消息 2018-06-26

中文摘要:
二次有机气溶胶(SOA)是大气中重要的气溶胶组分,主要由挥发性有机物(VOCs)经化学转化形成,对天气气候、大气环境和人体健康有重要影响,但至今其确切的化学成分和形成机制还十分不清楚。研究SOA的方法主要采用实验室单个物种或多物种的化学过程的模拟研究,野外实际大气的SOA化学成分、源汇和多尺度分析的观测研究,以及大气中SOA形成的数值模拟的回报和预报研究。实验室研究是对SOA形成过程中获取基础数据和推究SOA生成机制的最主要手段。在过去的几十年中,特别是近五年,SOA的研究取得了较大的进展,其中包括SOA前体物、SOA形成机制及影响因子的进一步理解。本文就这些方面展开了概要性的综述,重点强调了我国研究人员所做的研究工作。在采用实验室烟雾箱系统模拟研究SOA方面,首先简述了烟雾系统的发展以及表征,讨论了跟烟雾箱箱体相关的壁效应问题,重点综述了萜烯类、芳香烃类、小分子类等化学物种转化形成SOA的研究进展。在采用流动管和其他反应器类模拟研究SOA方面,重点讨论了挥发性有机物在颗粒物表面或在液相中所形成的SOA的主要化学成分及其可能的作用。

引用:徐永福,贾龙.2018.实验室模拟研究大气二次有机气溶胶的形成[J].大气科学, https://doi.org/10.3878/j.issn.1006-9895.1805.17251


阅读剩余部分...

New collaborative publication in ACPD on SOA formation from furan

组内消息 2018-06-25

We’re excited to announce the publication of a new article in ACPD. This article provides new information on the roles of NOx level and RH on the formation of SOA from the photooxidation of furan in the presence of NaCl seed particles. Strong evidences indicate that both the RH and different NOx levels have a significant effect on SOA formation.

SOA vs RH.png
Dependences of maximum O3 concentration, SOA mass concentration, SOA yield and liquid water content(LWC) on relative humidity (RH).

Jiang, X., Tsona, N. T., Jia, L., Liu, S. J., Xu, Y.F., and Du, L.: Secondary organic aerosol formation from photooxidation of furan: effects of NOx level and humidity, Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2018-477 , in review, 2018.

New publication: Different roles of water in SOA formation

组内消息 2018-06-08

We are pleased to announce that our manuscript about Different roles of water in SOA formation from toluene and isoprene has been published in Atmospheric Chemistry and Physics.
TOT ART

Mechanisms for SOA formation from the O3 and OH oxidation channels of isoprene.
Mechanisms-for-SOA-formation-from-the-O3-and-OH-oxidation-channels-of-isoprene.png

Citation: Jia, L. and Xu, Y. F.: Different roles of water in secondary organic aerosol formation from toluene and isoprene, Atmos. Chem. Phys., 18, 8137-8154, https://doi.org/10.5194/acp-18-8137-2018, 2018.