气候变化领域集成服务门户(CCPortal): Seasonal source variability of carbonaceous aerosols at the Rwanda Climate Observatory

CCPortal

DOI	10.5194/acp-20-4561-2020
	Seasonal source variability of carbonaceous aerosols at the Rwanda Climate Observatory
	Andersson A.; Kirillova E.N.; Decesari S.; Dewitt L.; Gasore J.; Potter K.E.; Prinn R.G.; Rupakheti M.; De Dieu Ndikubwimana J.; Nkusi J.; Safari B.
发表日期	2020
ISSN	16807316
起始页码	4561
结束页码	4573
卷号	20 期号:8
英文摘要	Sub-Saharan Africa (SSA) is a global hot spot for aerosol emissions, which affect the regional climate and air quality. In this paper, we use ground-based observations to address the large uncertainties in the source-resolved emission estimation of carbonaceous aerosols. Ambient fine fraction aerosol was collected on filters at the high-altitude (2590ma.s.l.) Rwanda Climate Observatory (RCO), a SSA background site, during the dry and wet seasons in 2014 and 2015. The concentrations of both the carbonaceous and inorganic ion components show a strong seasonal cycle, with highly elevated concentrations during the dry season. Source marker ratios, including carbon isotopes, show that the wet and dry seasons have distinct aerosol compositions. The dry season is characterized by elevated amounts of biomass burning products, which approach ~ 95% for carbonaceous aerosols. An isotopic mass-balance estimate shows that the amount of the carbonaceous aerosol stemming from savanna fires may increase from 0.2 μgm-3 in the wet season up to 10 μgm-3 during the dry season. Based on these results, we quantitatively show that savanna fire is the key modulator of the seasonal aerosol composition variability at the RCO. © 2020 IEEE Computer Society. All rights reserved.
关键词	aerosol composition aerosol formation air quality biomass burning carbon isotope concentration (composition)regional climate seasonal variation
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/132093
推荐引用方式 GB/T 7714	Andersson A.,Kirillova E.N.,Decesari S.,et al. Seasonal source variability of carbonaceous aerosols at the Rwanda Climate Observatory[J]. Atmospheric Chemistry and Physics,2020,20(8).
APA	Andersson A..,Kirillova E.N..,Decesari S..,Dewitt L..,Gasore J..,...&Safari B..(2020).Seasonal source variability of carbonaceous aerosols at the Rwanda Climate Observatory.,20(8).
MLA	Andersson A.,et al."Seasonal source variability of carbonaceous aerosols at the Rwanda Climate Observatory".20.8(2020).