[{"name":"oden-ao-2018-aerosol-ebc-ae33-1","title":"Equivalent black carbon concentration measured with an aethalometer AE33 during the Arctic Ocean 2018 expedition","summary":"Equivalent black carbon (eBC) mass concentration was measured with a commercial aethalometer (model AE33, Magee Scientific, Berkeley, USA). Measurements were performed onboard of the Swedish icebreaker (I\/B) Oden from August to September 2018 as part of the expedition Arctic Ocean 2018. \r\n\r\nBlack carbon is an anthropogenic aerosol resulting from incomplete combustion (e.g. traffic or ship exhaust or industrial emissions). It is relevant for various atmospheric processes such as its influence on radiative transfer within the Earth's atmosphere.\r\n\r\nThe instrument was located on the 4th deck of I\/B Oden, switching hourly between a total and interstitial air inlet, with cutoff sizes of 40 and 1 \u00b5m respectively. Optical absorption was measured at 7 different wavelengths simultaneously, with a 1 second time resolution. We used the absorption at 880 nm (channel 6) to derive eBC, using a mass absorption cross-section value of 7.77 m\u00b2 g\u207b\u00b9.","citations":"Karlsson, L., Baccarini, A., Duplessis, P., Baumgardner, D., Brooks, I. M., Chang, R. Y.-W., Dada, L., D\u00e4llenbach, K. R., Heikkinen, L., Krejci, R., Leaitch, W. R., Leck, C., Partridge, D. G., Salter, M. E., Wernli, H., Wheeler, M. J., Schmale, J., & Zieger, P. (2022). Physical and chemical properties of cloud droplet residuals and aerosol particles during the Arctic Ocean 2018 expedition. Journal of Geophysical Research Atmospheres, 127(11). https:\/\/doi.org\/10.1029\/2021jd036383\r\n\r\nZieger, P. and Karlsson, L. (2022) Equivalent black carbon concentration measured during the Arctic Ocean 2018 expedition. Dataset version 1. Bolin Centre Database. https:\/\/doi.org\/10.17043\/oden-ao-2018-aerosol-ebc-1","comments":"Data were collected during the Arctic Ocean 2018 expedition on board the Swedish icebreaker Oden, which was organized by the [Swedish Polar Research Secretariat](https:\/\/polarforskningsportalen.se\/en\/arctic\/expeditions\/arctic-ocean-2018). The observations were part of the project \u2018Aerosol-cloud interactions in the High Arctic\u2019 (PI Paul Zieger, Department of Environmental Science, Stockholm University: see [MOCCHA project website](https:\/\/www.su.se\/english\/research\/research-projects\/microbiology-ocean-cloud-coupling-in-the-high-arctic-moccha) with updates).\r\nThe ship track with latitude and longitude information can be found in the [\u2018Navigation, meteorological and surface seawater data from the Arctic Ocean 2018 expedition\u2019](https:\/\/bolin.su.se\/data\/oden-ao-2018-navigation-1) data set.\r\n","category":"Atmosphere","subcategory":"Aerosols","keywords":"Arctic; Black carbon; AO18; MOCCHA; Icebreaker Oden; Central arctic ocean; Aethalometer","scientist":"Benjamin Heutte, Andrea Baccarini, Paul Zieger, Julia Schmale","firstname":"Julia","lastname":"Schmale","address":"EPFL Valais Wallis; EPFL ENAC IEE EERL; Route des Ronquos 86 ","postalcode":"1951","city":"Sion","province":"","country":"Switzerland","parameters":"Earth science > Atmosphere > Aerosols","location":"Ocean > Arctic Ocean","progress":"Completed","language":"English","project":"Arctic Ocean 2018 Expedition. Microbiology-Ocean-Cloud Coupling in the High Arctic - MOCCHA. This work was supported by the Knut and Alice Wallenberg Foundation within the ACAS project (Arctic Climate Across Scales, project no. 2016.0024); the Bolin Centre for Climate Research (RA2), the Swedish Research Council (VR grants 2018-05045, 2016-03518, and 2016-05100); the Swiss National Science Foundation (grant no. 200021_169090 and 200021_188478); the Swiss Polar Institute; the BNP Paribas Swiss Foundation (Polar Access Fund 2018). J.S. holds the Ingvar Kamprad Chair, sponsored by Ferring Pharmaceuticals.","publisher":"Bolin Centre Database","version":"1","constrains":"","access":""}]