Data from aethalometer AE-31 at Welgegund, South Africa in 2018. Data is corrected according to Collaud Coen et al., Atmos. Meas. Tech., 2010, using Cref = 4.3 after comparison with MAAP at Welgegund. Data is in prevailing conditions. Inlet is R&P PM10 and aerosol has been dried with a nafion dryer to RH < 40 %. Data filtered based on visual inspection of the data. Time is in UTC+2 (time stamp is center of averaging period). 1 h average values are averaged (mean) from 2 minute data. Each 1 h average is based on at least 40 minutes of measurements (66.7% data coverage required). Missing or bad data: -999. Columns 1 : year 2 : month 3 : day 4 : hour 5 : minute 6 : second 7 : absorption 370 nm [Mm^-1] 8 : absorption 470 nm [Mm^-1] 9 : absorption 520 nm [Mm^-1] 10 : absorption 590 nm [Mm^-1] 11 : absorption 660 nm [Mm^-1] 12 : absorption 880 nm [Mm^-1] 13 : absorption 950 nm [Mm^-1]

2025