气候变化领域集成服务门户(CCPortal): Spatio-temporal distribution and source partitioning of formaldehyde over Ethiopia and Kenya

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DOI	10.1016/j.atmosenv.2020.117706
	Spatio-temporal distribution and source partitioning of formaldehyde over Ethiopia and Kenya
	Liu Y.; Tang Z.; Abera T.; Zhang X.; Hakola H.; Pellikka P.; Maeda E.
发表日期	2020
ISSN	1352-2310
卷号	237
英文摘要	Understanding the local sources of atmospheric formaldehyde (HCHO) is a key step in accurately determining the inversion of biogenic volatile organic compounds (BVOCs). This study aims to clarify the main sources and emission patterns of local total HCHO column densities over Ethiopia and Kenya. Between 2005 and 2015, the total monthly HCHO varied from 3.7 × 1015 molecules/cm2 to 7.7 × 1015 molecules/cm2. Monthly HCHO showed a strong seasonal pattern with annual peaks on March, July (small peak) and October, which well matched with the rainy seasons in Ethiopia and Kenya. Natural sources contributed 36% to the total HCHO in the study area. Grassland and savannas showed high column densities in the long rainy season starting from March, with the monthly average emission value of 5.6 × 1015 molecules/cm2. Multiple regression result showed that vegetation contributed 3.5 × 1013 molecules/cm2 to monthly HCHO, with grassland and forest in eastern Kenya and the boundary of Ethiopia and Kenya were the main contributors in these regions. Biomass burning and methane contributed to HCHO emission in the western and northern Ethiopia with a magnitude of 1.4 × 1014 molecules/cm2 and 6.2 × 1016 molecules/cm2 per month, respectively. Economic activities showed negative response to HCHO columns, except over the two small-scale regions of Addis Ababa City and Nairobi City. This study quantified the HCHO from various sources and suggested that natural sources produce more HCHO than anthropogenic sources over Ethiopia and Kenya. © 2020 Elsevier Ltd
关键词	Distribution East Africa Formaldehyde OMI Source partitioning
语种	英语
scopus关键词	Economics; Formaldehyde; Volatile organic compounds; Anthropogenic sources; Atmospheric formaldehyde; Biogenic volatile organic compounds; Economic activities; Emission pattern; Multiple regressions; Spatiotemporal distributions; Strong seasonal pattern; Molecules; formaldehyde; methane; anthropogenic source; biomass burning; economic activity; formaldehyde; grassland; methane; multiple regression; savanna; spatiotemporal analysis; volatile organic compound; Article; density; Ethiopia; grassland; Kenya; priority journal; rainy season; resource partitioning; savanna; vegetation; Ethiopia; Kenya
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/249051
作者单位	Department of Geosciences and Geography, University of Helsinki, P.O. Box 64, Helsinki, 00014, Finland; Institute for Atmospheric and Earth System Research, Faculty of Science, University of Helsinki, Finland; Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China; Finnish Meteorological Institute, PL 503, Helsinki, 00101, Finland
推荐引用方式 GB/T 7714	Liu Y.,Tang Z.,Abera T.,et al. Spatio-temporal distribution and source partitioning of formaldehyde over Ethiopia and Kenya[J],2020,237.
APA	Liu Y..,Tang Z..,Abera T..,Zhang X..,Hakola H..,...&Maeda E..(2020).Spatio-temporal distribution and source partitioning of formaldehyde over Ethiopia and Kenya.ATMOSPHERIC ENVIRONMENT,237.
MLA	Liu Y.,et al."Spatio-temporal distribution and source partitioning of formaldehyde over Ethiopia and Kenya".ATMOSPHERIC ENVIRONMENT 237(2020).