http://bolin.su.se/data/andersson-2022-nairobi-1
August Andersson, Leonard Kirago, Örjan Gustafsson, Michael Gatari
Air pollution status and sources of black carbon aerosols in Nairobi, Kenya
Bolin Centre Database
2022
Datafile
Atmosphere
Aerosols
Carbonaceous aerosol
Air pollution
Radiocarbon
Sub-Saharan Africa
Nairobi
PM2.5
Earth science > Atmosphere > Aerosols
August Andersson
2022-03-24T10:09:28+00:00
English
1
The data is provided in one xlsx spreadsheet file that contains concentration data (PM2.5, carbonaceous aerosols, water-soluble inorganic ions) 4-days cumulative rainfall, ¹⁴C-BC, and source apportionments of elemental carbon (EC) (fraction fossil and fraction biomass burning). The same data are also provided in one comma-separated (csv) file.
##### Data file content
- Sample code
- Week day
- Start date
- Stop date
- Fine particles
- PM2.5 (μg/m³)
- Carbonaceus aerosols
- OC (μgC/m³)
- BC (μgC/m³)
- Cations
- Na⁺ (ng/m³)
- NH⁴⁺ (ng/m³)
- K⁺ (ng/m³)
- Mg²⁺ (ng/m³)
- Ca²⁺ (ng/m³)
- Anions
- F⁻ (ng/m³)
- Cl⁻ (ng/m³)
- NO³⁻ (ng/m³)
- PO₄³⁻ (ng/m³)
- SO₄²⁻ (ng/m³)
- EC ¹⁴C
- ¹⁴C pMC BC (%)
- 4-days cumulative rains
- Rainfall (mm)
- D14C (‰)
- *ƒ*fossil
- Source apportionment
- *ƒ*biomass
- BC biomass(μg/m³)
- BC fossil (μg/m³)
The sampling site is located on a rooftop of one of the University of Nairobi buildings, Nairobi, Kenya.
Location: 1.279° S, 36.817° E. Height above ground level: 17 m. Height above sea level: 1690 m asl. Sampling duration: February 2014 – February 2015. Sampling type: PM2.5 inlet; quartz fibre filter samples.
Carboneceous 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).
Every 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 ¹⁴C using accelerator mass spectroscopy at Tandem laboratory at Uppsala University, Sweden.