Ultrafine particle concentration measured during the Arctic Ocean 2018 expedition

Andrea Baccarini, Julia Schmale

The ultrafine particle (UFP) concentration is the concentration of particles having a diameter between 2.5 and 15 nm, it is reported in terms of particle number per cubic centimeter at a time resolution of 10 minutes.

UFP are the smallest particles within the aerosol population and are formed from condensation of gaseous precursors (e.g., sulfuric acid or iodic acid). A high concentration of UFP is an indication that a new particle formation event is taking place or happened recently.

Measurements were performed on the 4th deck of icebreaker Oden during August and September 2018 along the track of the Arctic Ocean 2018 expedition.

Citation

Andrea Baccarini, Julia Schmale (2020) Ultrafine particle concentration measured during the Arctic Ocean 2018 expedition. Dataset version 1. Bolin Centre Database. https://doi.org/10.17043/oden-ao-2018-aerosol-ufp-1

References

Baccarini A, Karlsson L, Dommen J, Duplessis P, Vüllers J, Brooks IM, Saiz-Lopez A, Salter M, Tjernström 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. https://doi.org/10.1038/s41467-020-18551-0

Data description

The UFP concentration was calculated as the difference between the concentration of particles larger than 2.5 nm (measured with an ultrafine condensation particle counter (UCPC)) and the particle concentration larger than 15 nm (obtained by integration of the particle size distribution measured with a differential mobility particle sizer (DMPS)).

The DMPS integrated number concentration was subtracted directly from the number concentration measured with the UCPC after resampling to 10 minute time resolution. For periods where the UCPC was not working properly we used measurements from a particle size magnifier.

The time resolution is 10 minutes and the UFP concentration was calculated only for data that were not affected by the ship exhaust. The datetime is reported as UTC in the format yyyy-mm-dd HH:MM:SS.

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 data set.

The UCPC and DMPS data can be also be found in the Bolin Centre database.

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

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).