Equivalent Black Carbon (eBC) mass concentrations in summertime in Narsaq, South Greenland during Greenfjord 2023

Abstract and dataset contents: This dataset contains measurements of equivalent black carbon (eBC) mass concentrations obtained using a portable micro-aethalometer (mAeth, MA200, Aethlabs). The instrument measures light attenuation by aerosols deposited on a PTFE filter band at five wavelengths: 375, 470, 528, 625, and 880 nm. Measurements were carried out at the Narsaq International Research Station (NIRS) in southern Greenland (60.9158°N, 46.0533°W, 17 m above sea level) during the Greenfjord campaign in June-August 2023. Metadata is provided in file 'metadata_mAeth.docx'. Briefly, the dataset files (Lv2_mAeth.csv) include: Datetime Equivalent black carbon aerosol mass in ng m-3 at 375, 470, 528, 625 and 880 nm Calculated absorption coefficients for 375, 470, 528, 625 and 880 nm Pollution flag to inform data user when short-lived spikes can be found in the data from local anthropogenic pollution Inlet relative humidity (RH) flag to inform the data user when the RH in the inlet system reached over 40 % Funding acknowledgements: This work was supported by funding from the Swiss National Science Foundation grant no. 200021_212101, the Swiss Polar Institute grant no. SPI-FLAG-2021-002 Greenfjord, and the ENAC Flagship 2022 ECO-Plains.