Modeling of HCHO and CHOCHO at a semi-rural site in southern China   during the PRIDE-PRD2006 campaign

doi:10.5194/acp-14-12291-2014

CORC > 北京大学 > 环境科学与工程学院

	Modeling of HCHO and CHOCHO at a semi-rural site in southern China during the PRIDE-PRD2006 campaign
	Li, X. ; Rohrer, F. ; Brauers, T. ; Hofzumahaus, A. ; Lu, K. ; Shao, M. ; Zhang, Y. H. ; Wahner, A.
刊名	atmospheric chemistry and physics
	2014
关键词	MAX-DOAS MEASUREMENTS AIR-POLLUTION SOURCES PEARL RIVER DELTA RURAL SITE FORMALDEHYDE MEASUREMENTS SECONDARY SOURCES ORGANIC-COMPOUNDS GLOBAL-SCALE GLYOXAL AEROSOL
DOI	10.5194/acp-14-12291-2014
英文摘要	HCHO and CHOCHO are important trace gases in the atmosphere, serving as tracers of VOC oxidations. In the past decade, high concentrations of HCHO and CHOCHO have been observed for the Pearl River Delta (PRD) region in southern China. In this study, we performed box model simulations of HCHO and CHOCHO at a semi-rural site in the PRD, focusing on understanding their sources and sinks and factors influencing the CHOCHO to HCHO ratio (R-GF). The model was constrained by the simultaneous measurements of trace gases and radicals. Isoprene oxidation by OH radicals is the major pathway forming HCHO, followed by degradations of alkenes, aromatics, and alkanes. The production of CHOCHO is dominated by isoprene and aromatic degradation; contributions from other NMHCs are of minor importance. Compared to the measurement results, the model predicts significant higher HCHO and CHOCHO concentrations. Sensitivity studies suggest that fresh emissions of precursor VOCs, uptake of HCHO and CHOCHO by aerosols, fast vertical transport, and uncertainties in the treatment of dry deposition all have the potential to contribute significantly to this discrepancy. Our study indicates that, in addition to chemical considerations (i.e., VOC composition, OH and NOx levels), atmospheric physical processes (e.g., transport, dilution, deposition) make it difficult to use the CHOCHO to HCHO ratio as an indicator for the origin of air mass composition.; Meteorology & Atmospheric Sciences; SCI(E); 2; ARTICLE; x.li@fz-juelich.de; a.wahner@fz-juelich.de; 22; 12291-12305; 14
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/324372]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Li, X.,Rohrer, F.,Brauers, T.,et al. Modeling of HCHO and CHOCHO at a semi-rural site in southern China during the PRIDE-PRD2006 campaign[J]. atmospheric chemistry and physics,2014.
APA	Li, X..,Rohrer, F..,Brauers, T..,Hofzumahaus, A..,Lu, K..,...&Wahner, A..(2014).Modeling of HCHO and CHOCHO at a semi-rural site in southern China during the PRIDE-PRD2006 campaign.atmospheric chemistry and physics.
MLA	Li, X.,et al."Modeling of HCHO and CHOCHO at a semi-rural site in southern China during the PRIDE-PRD2006 campaign".atmospheric chemistry and physics (2014).