Mask to identify polluted periods during the Arctic Ocean 2018 expedition
Andrea Baccarini, Julia Schmale, Josef Dommen
Aerosol and trace gas measurements are strongly affected by the ship exhaust and other human activities (e.g., helicopter flights). Therefore, it is important to discriminate between clean and polluted periods.
This mask provides an indication of clean periods that were unaffected by human activities and are therefore representative of background Arctic conditions. 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.
This mask refers to measurements that were performed on the 4th deck of icebreaker Oden during August and September 2018 along the track of the Arctic Ocean 2018 expedition.
AtmosphereAerosolsPollution recordAO2018Arctic OceanIcebreaker OdenArctic Ocean 2018Atmospheric ScienceAtmospheric ChemistryAtmospheric PhysicsClouds Aerosol ScienceMicrobiology-Ocean-Cloud-Coupling in the High ArcticMOCCHAHigh ArcticNorth PoleAerosol-Cloud-Interaction 2018AerosolNew particle formation
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Citation
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 Comm. (in press). https://doi.org/10.1038/s41467-020-18551-0
Data description
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.
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 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).
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
First name
Julia
Last name or organisation
Schmale
Email address
Address
Extreme Environments Research Laboratory, EPFL Valais Wallis
Postal code
CH-1951
City
Sion
Country
Switzerland
GCMD science keyword
Earth science > Atmosphere
GCMD location
Ocean > Arctic Ocean
Dataset language
English
Begin date
2018-08-01
End date
2018-09-19