气候变化领域集成服务门户(CCPortal): Modeling organic aerosol over Europe in summer conditions with the VBS-GECKO parameterization: Sensitivity to secondary organic compound properties and IVOC (intermediate-volatility organic compound) emissions

CCPortal

DOI	10.5194/acp-20-4905-2020
	Modeling organic aerosol over Europe in summer conditions with the VBS-GECKO parameterization: Sensitivity to secondary organic compound properties and IVOC (intermediate-volatility organic compound) emissions
	Lannuque V.; Couvidat F.; Camredon M.; Aumont B.; Bessagnet B.
发表日期	2020
ISSN	16807316
起始页码	4905
结束页码	4931
卷号	20 期号:8
英文摘要	The VBS-GECKO (volatility basis set - Generator for Explicit Chemistry and Kinetics of Organics in the Atmosphere) parameterization for secondary organic aerosol (SOA) formation was integrated into the chemistry-transport model CHIMERE. Concentrations of organic aerosol (OA) and SOA were simulated over Europe for the July-August 2013 period. Simulated concentrations with VBS-GECKO were compared to results obtained with the former H2O parameterization implemented in CHIMERE and to observations from EMEP, ACTRIS and other observations available in the EBAS database. The model configuration using the VBS-GECKO parameterization slightly improves the performances compared to the model configuration using the former H2O parameterization. The VBS-GECKO model configuration performs well for stations showing a large SOA concentration from biogenic sources, especially in northern Europe, but underestimates OA concentrations over stations close to urban areas. Simulated OA was found to be mainly secondary (ĝˆ1/485 %) and from terpene oxidation. Simulations show negligible contribution of the oxidation of mono-aromatic compounds to SOA production. Tests performed to examine the sensitivity of simulated OA concentrations to hydro-solubility, volatility, aging rates and NOx regime have shown that the VBS-GECKO parameterization provides consistent results, with a weak sensitivity to changes in the parameters provided by the gas-phase mechanism included in CHIMERE (e.g., HOx or NOx concentrations). Different scenarios considering intermediate-volatility organic compound (IVOC) emissions were tested to examine the contribution of IVOC oxidation to SOA production. At the continental scale, these simulations show a weak sensitivity of OA concentrations to IVOC emission variations. At the local scale, accounting for IVOC emissions was found to lead to a substantial increase in OA concentrations in the plume from urban areas. This additional OA source remains too small to explain the gap between simulated and measured values at stations where anthropogenic sources are dominant. . © 2020 Copernicus GmbH. All rights reserved.
关键词	aerosol formation anthropogenic source atmospheric modeling biogenic emission concentration (composition)organic compound parameterization summer volatile organic compound Northern Europe
语种	英语
来源机构	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132077
推荐引用方式 GB/T 7714	Lannuque V.,Couvidat F.,Camredon M.,et al. Modeling organic aerosol over Europe in summer conditions with the VBS-GECKO parameterization: Sensitivity to secondary organic compound properties and IVOC (intermediate-volatility organic compound) emissions[J]. Atmospheric Chemistry and Physics,2020,20(8).
APA	Lannuque V.,Couvidat F.,Camredon M.,Aumont B.,&Bessagnet B..(2020).Modeling organic aerosol over Europe in summer conditions with the VBS-GECKO parameterization: Sensitivity to secondary organic compound properties and IVOC (intermediate-volatility organic compound) emissions.,20(8).
MLA	Lannuque V.,et al."Modeling organic aerosol over Europe in summer conditions with the VBS-GECKO parameterization: Sensitivity to secondary organic compound properties and IVOC (intermediate-volatility organic compound) emissions".20.8(2020).