[{"title":"Mask to identify polluted periods during the Arctic Ocean 2018 expedition","summary":"Aerosol and trace gas measurements are strongly affected by the ship exhaust and other human activities (e.g., helicopter flights). Therefore, it is important to discriminate between clean and polluted periods.\r\n\r\nThis mask provides an indication of clean periods that were unaffected by human activities and are therefore representative of background Arctic conditions. This mask was specifically developed for the new particle formation inlet used during the campaign, other inlets located in different places may be affected by pollution in slightly different ways.\r\n\r\nThis mask refers to measurements that were performed on the 4th deck of icebreaker Oden during August and September 2018 along the track of the Arctic Ocean 2018 expedition.","citations":"Baccarini A, Karlsson L, Dommen J, Duplessis P, V\u00fcllers J, Brooks IM, Saiz-Lopez A, Salter M, Tjernstr\u00f6m M, Baltensperger U, Zieger P, Schmale J (2020) Frequent new particle formation over the high Arctic pack ice by enhanced iodine emissions. Nature Communications 11:4924. doi:10.1038\/s41467-020-18551-0","comments":"The ship track with latitude and longitude information can be found in the [Navigation, meteorological and surface seawater data from the Arctic Ocean 2018 expedition](https:\/\/bolin.su.se\/data\/ao2018-navigation) data set.\r\n\r\nThe data creator ORCID are the following:\r\n- Andrea Baccarini: https:\/\/orcid.org\/0000-0003-4614-247X\r\n- Julia Schmale: https:\/\/orcid.org\/0000-0002-1048-7962\r\n- Josef Dommen: https:\/\/orcid.org\/0000-0002-0006-0009\r\n\r\nData were collected during the Arctic Ocean 2018 expedition on board the Swedish icebreaker (I\/B) 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.aces.su.se\/research\/projects\/microbiology-ocean-cloud-coupling-in-the-high-arctic-moccha\/) with updates).","category":"Atmosphere","subcategory":"Aerosols","keywords":"Pollution record; AO2018; Arctic Ocean; Icebreaker Oden; Arctic Ocean 2018; Atmospheric Science; Atmospheric Chemistry; Atmospheric Physics; Clouds Aerosol Science; Microbiology-Ocean-Cloud-Coupling in the High Arctic; MOCCHA; High Arctic; North Pole; Aerosol-Cloud-Interaction 2018; Aerosol; New particle formation","scientist":"Andrea Baccarini, Julia Schmale, Josef Dommen","firstname":"Julia","lastname":"Schmale","address":"Extreme Environments Research Laboratory, EPFL Valais Wallis","postalcode":"CH-1951","city":"Sion","province":"","country":"Switzerland","parameters":"Earth science > Atmosphere","location":"Ocean > Arctic Ocean","progress":"Completed","language":"English","project":"Arctic Ocean 2018. This work was supported by the Swiss National Science Foundation (grant no. 200021_169090), the Swiss Polar Institute, the BNP Paribas Swiss Foundation (Polar Access Fund 2018), 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 (project no. 2018-05045 and project no. 2016-05100).","publisher":"Bolin Centre Database","version":"1.0","constrains":"","access":"Free"}]