http://bolin.su.se/data/kirago-2024-fine-aerosols-1 Leonard Kirago, Örjan Gustafsson, Samuel M. Gaita, Sophie L. Haslett, H. Langley deWitt, Jimmy Gasore, Katherine E. Potter, Ronald G. Prinn, Maheswar Rupakheti, Jean de Dieu Ndikubwimana, Bonfils Safari, August Andersson Bolin Centre Database 2024 Datafile Atmosphere Aerosols Black carbon Carbonaceous aerosol Open fires Carbon isotopes Sub-Saharan Africa Source apportionment Earth science > Atmosphere > Aerosols > Carbonaceous aerosols Örjan Stockholm University 2024-04-03T07:25:07+00:00 English 1 The data is provided as a .xlsx file with two sheets. The first sheet `Meta-Data` contains a ReadMe to the data. The second sheet `Mugogo_Data` contains information on concentrations of different aerosol species. Column names: 1. `filter_id` Filter ID 1. `day_start` Day the measurements were started 1. `month_start` Month the measurements were started 1. `year_start` Year the measurements were started 1. `day_end` Day the measurements were stopped 1. `month_end` Month the measurements were stopped 1. `year_end` Year the measurements were stopped 1. `time_collected` Time the air was collected 1. `v_air` Volume of the air that was collected 1. `oc` Organic carbon in μg m⁻² 1. `bc` Black carbon in μg m⁻² 1. `bc_cubic` Black carbon in μg m⁻³ 1. `oc_cubic` Organic carbon in μg m⁻³ 1. `nh4` Ammonium concentration in μg m⁻³ 1. `k` Potassium concentration in μg m⁻³ 1. `so4` Sulfate concentration in μg m⁻³ 1. `no3` Nitrate concentration in μg m⁻³ 1. `mg0` Magnesium concentration in μg m⁻³ 1. `ca` Calcium concentration in μg m⁻³ 1. `cl` Chlorine concentration in μg m⁻³ 1. `oc/bc` Mass ratio of organic carbon to black carbon 1. `nh4/bc` Mass ratio of ammonium concentration to black carbon 1. `so4/bc` Mass ratio of sulfate concentration to black carbon 1. `k/bc` Mass ratio of potassium concentration to black carbon 1. `no3/bc` Mass ratio of nitrate concentration to black carbon 1. `rainfall` Rainfall in mm 1. `delta13_c` carbon-13 isotope signatures of black carbon in per mille (‰) 1. `delta14_c` carbon-14 isotope signatures of black carbon in per mille (‰) 1. `bc_c3` Fractional contribution of C3 plants burning to black carbon loadings 1. `bc_c4` Fractional contribution of C4 plants burning to black carbon loadings 1. `bc_fossil` Fractional contribution of fossil fuels combustion to black carbon loadings This dataset is part of the [Advanced Global Atmospheric Gases Experiment](https://agage.mit.edu/). Carbonaceous aerosol concentrations were obtained by thermal optical transmission analysis (TOT; Sunset Laboratory, Tigard, Oregon) using NIOSH 5040 protocol, for each of the collected PM2.5 samples. Anion and cations were analysed using Dionex Aquion ion chromatography instrument (Thermo Finnigan LLC). Twenty samples over the two-year study period, mostly during high black carbon (BC) loading events in the dry season, were selected for isotope analysis of the BC isolate. Here, the BC fraction of the carbonaceous aerosols was isolated, cyro-trapped and shipped to Tandem Laboratory in Uppsala University and analyzed for dual carbon isotopes. The ẟ¹³C signatures were measured using an isotope ratio mass spectrometer (IRMS), while radiocarbon signatures were measured using accelerator mass spectrometry (AMS). The source fractions and their uncertainties were estimated through Markov chain Monte Carlo (MCMC) simulations, implemented in Matlab 2019b (1000 000 iterations; 10 000 burn-in; 100 data thinning).