Weekly integrated PM2.5 and Black Carbon concentrations measured at 146 locations in Accra, Ghana for 2019 – 2020 (Alli et al Envrionmental Research Letters 2021)

Citation: A.S. Alli et al. " Spatial-temporal patterns of ambient fine particulate matter (PM2.5) and black carbon (BC) pollution in Accra" Environmental Research Letters 16 (2021) 074013.

Link to paper: https://doi.org/10.1088/1748-9326/ac074a

Datasets

·    Integrated_PM25_Fixed_Sites.csv – weekly gravimetric PM2.5 concentration measured at fixed sites.

·     Integrated_PM25_Rotating_Sites.csv – weekly gravimetric PM2.5 concentration measured at rotating sites.

·     Integrated_BC_Fixed_Sites.csv – weekly BC values measured at fixed sites.

·     Integrated_BC_Rotating_Sites.csv – weekly BC values measured at rotating sites.

·     Continous_PM25__Corrected_Fixed_Rotating_Sites.csv – minute-by-minute corrected PM2.5 values for fixed and rotating sites.

Note: See publication above for details on fixed and rotating sites, and correction process for continuous PM2.5 values. Datasets contain samples that met inclusion criteria described in publication.

Variables in csv files

ID: Site ID

Start_date: measurement start date   

Start_time: measurement start time  

End_date: measurement end date     

End_time: measurement end time                 

site_type:

·       CBI: Commercial, traffic, or industrial  

·       High density: High-density residential  

·       Medium/Low density: Low or medium density residential  

·       Background: Peri-urban         

Lat: Latitude as decimal degrees

Lon: Longitude as decimal degrees   

Season:

·       Non-Har: non-Harmattan

·       Har: Harmattan

Conc: Weekly gravimetric PM2.5 concentration

Adj.conc: Season adjusted weekly gravimetric PM2.5 concentration for rotating sites. Adjusted concentrations represent annual PM2.5 values. See information in the manuscript.

Absorp_coef: Absorption coefficient used as a marker for black carbon (BC)

Adj_absorp_coef: Season adjusted absorption coefficient (BC)

PM2.5: continuous PM2.5 values

PM2.5_cor: corrected continuous PM2.5 values