[{"title":"Concentration of particles larger than 2.5 nm collected during the Arctic Ocean 2018 expedition","summary":"The concentration of particles larger than 2.5 nm was measured with an ultrafine condensation particle counter (UCPC). The concentration was corrected for diffusional losses in the inlet based on the neutral cluster and air ion spectrometer (NAIS) size distribution.\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. 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\n\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 particle per cubic centimeter in 60 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\nKangasluoma J, Attoui M (2019) Review of sub-3 nm condensation particle counters, calibrations, and cluster generation methods. Aerosol science and technology 2019, vol. 53, no. 11. doi:10.1080\/02786826.2019.1654084","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 \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":"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; Ultrafine condensation particle counter; UCPC; Ultrafine particles; New particle formation; CPC3776","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. 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"}]