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 (PM_2.5) 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 PM_2.5 concentration measured at fixed sites.

·     Integrated_PM25_Rotating_Sites.csv – weekly gravimetric PM_2.5 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 PM_2.5 values for fixed and rotating sites.

Note: See publication above for details on fixed and rotating sites, and correction process for continuous PM_2.5 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 PM_2.5 concentration

Adj.conc: Season adjusted weekly gravimetric PM_2.5 concentration for rotating sites. Adjusted concentrations represent annual PM_2.5 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 PM_2.5 values

PM2.5_cor: corrected continuous PM_2.5 values