http://bolin.su.se/data/oden-ao-2018-aerosol-merged-psd-1 Andrea Baccarini, Julia Schmale, Josef Dommen, Linn Karlsson, Paul Zieger Bolin Centre Database 2020 Datafile Atmosphere Aerosols Aerosol physical properties 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 Particle size distribution Aerosol New particle formation Earth science > Atmosphere Julia Schmale 2020-09-23T10:00:28+00:00 English 1 We produced the merged PSD by averaging the NAIS and DMPS data where their size measurement range overlaps (20 - 40 nm) and combined these data directly with the NAIS measurements below 20 nm and with the DMPS above 40 nm. For the averaging, we used a weighted average with the NAIS and the DMPS data weighting more at smaller and larger sizes respectively (weights were linearly distributed between 0 and 1). Measurements were corrected for transmission losses and cleaned from exhaust influence before the merging procedure. The datetime is reported as UTC in the format yyyy-mm-dd HH:MM:SS. Data are reported as dN/dlog(Dp), where dN is the particle number concentration per cubic centimeter per measured size bin, normalized over the logarithm of the bin width. The bin width is defined as the distance between two diameters. For those periods when the NAIS was not measuring or did not provide reliable data the merged PSD was set equal to the DMPS only. In these cases, the columns in the data files corresponding to the NAIS diameter bins where left empty. 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. The original data sets for the merged PSD product can be found in the [Aerosol particle number size distribution data collected during the Arctic Ocean 2018 expedition](https://bolin.su.se/data/ao2018-aerosol-dmps) and [Size distribution of neutral and charged particles smaller than 42 nm collected during the Arctic Ocean 2018 expedition](https://bolin.su.se/data/ao2018-aerosol-nais) data sets. The data creator ORCID are the following: - Andrea Baccarini: https://orcid.org/0000-0003-4614-247X - Julia Schmale: https://orcid.org/0000-0002-1048-7962 - Josef Dommen: https://orcid.org/0000-0002-0006-0009 - Linn Karlsson: https://orcid.org/0000-0003-0885-7650 - Paul Zieger: https://orcid.org/0000-0001-7000-6879 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](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).