Andrea Baccarini, Julia Schmale, Josef Dommen Mask to identify polluted periods during the Arctic Ocean 2018 expedition Bolin Centre Database 2020 Datafile Atmosphere Aerosols 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 Earth science > Atmosphere Julia Schmale 2020-09-23T10:00:36+00:00 English 1.0 The pollution mask is a numeric timeseries with 1 and 2 indicating clean and polluted periods respectively. The time resolution of the mask is 60s but can be resampled in order to match the instrument resolution. The datetime is reported as UTC in the format yyyy-mm-dd HH:MM:SS. This mask was developed by looking at the particle concentration time derivative (pollution is characterized by faster time variation compared to natural processes), the particle size distribution and other indicators of pollution like black carbon and CO₂. 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. 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]( data set. The data creator ORCID are the following: - Andrea Baccarini: - Julia Schmale: - Josef Dommen: Data 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]( The observations were part of the project ‘Aerosol-cloud interactions in the High Arctic’ (PI Paul Zieger, Department of Environmental Science, Stockholm University; see [MOCCHA project website]( with updates).