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DOI | 10.5194/acp-20-4561-2020 |
Seasonal source variability of carbonaceous aerosols at the Rwanda Climate Observatory | |
Andersson, August1,2; Kirillova, Elena N.1,2,3; Decesari, Stefano3; DeWitt, H. Langley4; Gasore, Jimmy4,5,6; Potter, Katherine4; Prinn, Ronald G.4; Rupakheti, Maheswar7; Ndikubwimana, Jean de Dieu5; Nkusi, Julius5; Safari, Bonfils6 | |
2020-04-20 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2020 |
卷号 | 20期号:8页码:4561-4573 |
文章类型 | Article |
语种 | 英语 |
国家 | Sweden; Italy; USA; Rwanda; Germany |
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 (2590 m a.s.1.) 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 similar to 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 mu g m(-3) in the wet season up to 10 mu g m(-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. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000528790500001 |
WOS关键词 | SOUTHERN AFRICA ; ORGANIC-CARBON ; BLACK CARBON ; ATMOSPHERIC AEROSOL ; SAVANNA FIRES ; TRACE GASES ; BIOMASS ; DIOXIDE ; RADIOCARBON ; VEGETATION |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/248985 |
专题 | 地球科学 |
作者单位 | 1.Stockholm Univ, Dept Environm Sci, S-10691 Stockholm, Sweden; 2.Stockholm Univ, Bolin Ctr Climate Res, S-10691 Stockholm, Sweden; 3.Natl Res Council Italy, Inst Atmospher Sci & Climate ISAC, Bologna, Italy; 4.MIT, Ctr Global Change Sci, 77 Massachusetts Ave, Cambridge, MA 02139 USA; 5.Minist Educ, Climate Secretariat, Kigali, Rwanda; 6.Univ Rwanda, Coll Sci & Technol, Sch Phys, Phys Dept, Kigali, Rwanda; 7.IASS, Potsdam, Germany |
推荐引用方式 GB/T 7714 | Andersson, August,Kirillova, Elena N.,Decesari, Stefano,et al. Seasonal source variability of carbonaceous aerosols at the Rwanda Climate Observatory[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2020,20(8):4561-4573. |
APA | Andersson, August.,Kirillova, Elena N..,Decesari, Stefano.,DeWitt, H. Langley.,Gasore, Jimmy.,...&Safari, Bonfils.(2020).Seasonal source variability of carbonaceous aerosols at the Rwanda Climate Observatory.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(8),4561-4573. |
MLA | Andersson, August,et al."Seasonal source variability of carbonaceous aerosols at the Rwanda Climate Observatory".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.8(2020):4561-4573. |
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