[{"name":"andersson-2022-nairobi-1","title":"Air pollution status and sources of black carbon aerosols in Nairobi, Kenya","summary":"The dataset includes year-round concentration of PM2.5 fine particles and its constituents, together with radio-carbon (\u0394\u00b9\u2074C) signatures of black carbon aerosols (BC) for aerosol samples collected in Nairobi between February 2014 and February 2015.\r\n\r\nThe carbon isotope data is used to quantify the relative contribution of the two main emissions sources of black carbon in Nairobi, namely fossil fuel combustion and biomass burning.\r\n\r\nThe sampling site was located on a rooftop of one of the University of Nairobi buildings.","citations":"Kirago L, Gatari MJ, Gustafsson \u00d6, Andersson A (2022) Black carbon emissions from traffic contribute substantially to air pollution in Nairobi, Kenya. Communications Earth & Environment. doi:10.1038\/s43247-022-00400-1","comments":"The sampling site is located on a rooftop of one of the University of Nairobi buildings, Nairobi, Kenya.\r\n\r\nLocation: 1.279\u00b0 S, 36.817\u00b0 E. Height above ground level: 17 m. Height above sea level: 1690 m asl. Sampling duration: February 2014\u2060\u200a\u2013\u200a\u2060February 2015. Sampling type: PM2.5 inlet; quartz fibre filter samples.\r\n\r\nCarboneceous aerosol concentrations were obtained by thermal optical transmission analysis (TOT; Sunset Laboratory, Tigard, Oregon) using NIOSH 5040 protocol, for each of the PM2.5 samples, collected in Nairobi between March 2014 and February 2015. Anion and cations were analysed using Dionex Aquion ion chromatography instrument (Thermo Finnigan LLC).\r\n\r\nEvery second sample (excluding blanks), was selected for isolation and cryo-trapping of BC (n = 28), using a modified Sunset TOT instrument. The samples were analysed for \u00b9\u2074C using accelerator mass spectroscopy at Tandem laboratory at Uppsala University, Sweden.","category":"Atmosphere","subcategory":"Aerosols","keywords":"Carbonaceous aerosol; Air pollution; Radiocarbon; Sub-Saharan Africa; Nairobi; PM2.5","scientist":"August Andersson, Leonard Kirago, \u00d6rjan Gustafsson, Michael Gatari","firstname":"August","lastname":"Andersson","address":"Department of Environmental Science; Stockholm University","postalcode":"SE-106 91","city":"Stockholm","province":"","country":"Sweden","parameters":"Earth science > Atmosphere > Aerosols","location":"Continent > Africa > Eastern Africa > Kenya","progress":"Completed","language":"English","project":"This work was supported by research grants from the Swedish Research council (VR contract no. 2017-05687 and 2020-05384) and the Swedish Research Council for Sustainable Development (FORMAS contract no. 2020-01951).","publisher":"Bolin Centre Database","version":"1","constrains":"","access":""}]