DOI: 10.5281/zenodo.3961349
title: Aerosol optical parameters and Equivalent Black Carbon (EBC)

description: The produced dataset (in csv format) contains physical and optical characteristics of aerosol population as measured for the period 2016-2019 at the Italian Arctic station Dirigibile Italia (DI) in Ny Alesund (Svalbard Archipelago). Long-term in situ aerosol measurements at DI Svalbard are performed at Gruvebadet observatory (78.918' °N, 11.895' °E; 61m above sea level), which is located 800m south-west of the Ny-Ãlesund research village. At Gruvebadet aerosol scattering is measured at one wavelenght (530 nm, Nephelometer Radiance Research M903), while aerosol absorption is evaluated at three wavelengths with a Radiance Research PSAP at 1-minute time resolution (Bond et al. 1999), since 2010. Data are then averaged over 1-hour period. Absorption coefficients are measured at 467 nm, 530 nm, and 660 nm, with a precision ranging between 20 and 25%. Measurements are performed generally from April to September, with a limited number of data during the winter season. Absorption measurements are corrected according to Bond et al. (1999) and Virkkula (2010) for filter transmission, flow, and sampling filter area. Data are not corrected for aerosol scattering, while shadowing effect is considered negligible due to the low aerosol loading. Absorption coefficients are normalized at standard pressure and temperature conditions (1 atm and 0 °C). The BC content in evaluated considering the central value according to Zanatta et al. (2018), with a MAC (mass absorption cross section) of 7.72 m<sup>2</sup>/g Scattering and Absortion coefficient are in Mm<sup>-1</sup>, Equivalent Black Carbon (EBC) content in ng/m<sup>3</sup> Data are stored in annual files that contains columns of collected and evaluated data as followin the following order: <strong>column 1</strong> Date time (DD/MM/AAAA HH:MM) in UTC <strong>column 2</strong> Scattering coefficient at 530 nm (Mm<sup>-1</sup>) <strong>column 3</strong> Absorption coefficient at 467 nm (Mm<sup>-1</sup>) <strong>column 4</strong> Absorption coefficient at 530 nm (Mm<sup>-1</sup>) <strong>column 5</strong> Absorption coefficient at 660 nm (Mm<sup>-1</sup>) <strong>column 6</strong> Equivalent Black Carbon (EBC) (ng/m<sup>3</sup>) HEADER<br> date time, Scattering coefficient , Absorption1 coefficient, Absorption1 coefficient, Absorption1 coefficient, equivalentBC content where the Scattering and Absortion coefficient are in Mm^-1,<br> equivalent BC content in ng/m^3 <br> References Bond, T. C., Anderson, T. L., and Campbell, D.: Calibration and Intercomparison of Filter-Based Measurements of Visible Light Absorption by Aerosols, Aerosol Sci. Tech.,<br> 30, 582â€“600, https://doi.org/10.1080/027868299304435, 1999.â€‚ Virkkula, A.: Correction of the Calibration of the 3-wavelength Particle Soot Absorption Photometer (3Î» PSAP),<br> Aerosol Sci. Tech., 44, 706â€“712, https://doi.org/10.1080/02786826.2010.482110, 2010.â€‚ Zanatta, M., Laj, P., Gysel, M., Baltensperger, U., Vratolis, S., Eleftheriadis, K., Kondo, Y., Dubuisson, P., Winiarek, V., Kazadzis, S., Tunved, P., and Jacobi, H.-W.: Effects of mixing state on optical and radiative properties of black carbon in the European Arctic, Atmos. Chem. Phys., 18, 14037-14057, https://doi.org/10.5194/acp-18-14037-2018, 2018