[{"title":"Size distribution of neutral and charged particles smaller than 42 nm collected during the Arctic Ocean 2018 expedition","summary":"The size distribution of neutral and charged particles was measured using a neutral cluster and air ion spectrometer (NAIS) instrument. The concentration was corrected for diffusional losses in the inlet.\r\n\r\nThe concentration and temporal dynamics of small particles is fundamental to characterize the first step of new particle formation (NPF) and growth. Moreover, naturally charged particles and ions can provide information about the role of ion induced nucleation. Newly formed particles can grow to larger sizes where they act as cloud condensation nuclei, directly affecting the Earth radiative budget and cloud properties. \r\nMeasurements were performed on the 4th deck of icebreaker Oden during August and September 2018 along the track of the expedition. The concentration is reported as dN\/dlog(Dp) per cubic centimeter in 90 seconds average.","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 Comm. (in press). doi:10.1038\/s41467-020-18551-0 \r\n\r\nManninen HE et al. (2016) How to reliably detect molecular clusters and nucleation mode particles with Neutral cluster and Air Ion Spectrometer (NAIS). Atmos. Meas. Tech. 9:3577\u2060\u200a\u2013\u200a\u20603605. doi:10.5194\/amt-9-3577-2016\r\n\r\nMirme S, Mirme A (2013) The mathematical principles and design of the NAIS \u2013 a spectrometer for the measurement of cluster ion and nanometer aerosol size distributions. Atmos. Meas. Tech., 6:1061\u2060\u200a\u2013\u200a\u20601071. doi:10.5194\/amt-6-1061-2013\r\n\r\nWagner, R. et al. (2016) On the accuracy of ion measurements using a Neutral cluster and Air Ion Spectrometer. Boreal Env. Res. 21: 230\u2013241. ISSN: 1797-2469","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 ORCIDs 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 'Aerosol-cloud interactions in the High Arctic' (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":"Aerosol physical properties; Aerosols; AO2018; Arctic Ocean; Icebreaker Oden; Atmosphere; 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; Neutral cluster and air ion spectrometer; NAIS; Ultrafine particles; Ions; Ion induced nucleation; New particle formation","scientist":"Andrea Baccarini, Julia Schmale, Josef Dommen","firstname":"Julia","lastname":"Schmale","address":"Extreme Environments Research Laboratory\r\nEPFL 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. The 'Aerosol-cloud interactions in the High Arctic' project during the Arctic Ocean 2018 expedition was funded 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"}]