Chemical composition of semi-volatile aerosol collected during the Arctic Ocean 2018 expedition

Karolina Siegel, Claudia Mohr

This data set contains molecular-level chemical composition of the semi-volatile fraction (evaporating at ≤ 200 °C) of aerosol particles collected onto filters during 11⁠ – ⁠19 September 2018 during the MOCCHA campaign, which was a part of the Arctic Ocean 2018 expedition with Swedish icebreaker Oden.

The inlet was located on the 4th deck of Oden. The 12 filter samples were analyzed offline using an iodide high resolution time-of-flight chemical ionization mass spectrometer with a filter inlet for gases and aerosols (FIGAERO-HRToF-CIMS).

Detailed aerosol chemical composition is of importance for the aerosol particles' ability to form clouds by acting as cloud condensation nuclei (CCN) or ice nucleating particles (INP), as it determines factors such as solubility, hygroscopicity and volatility. It can also help to identify the different sources of the aerosol.

Citation

Karolina Siegel, Claudia Mohr (2022) Chemical composition of semi-volatile aerosol collected during the Arctic Ocean 2018 expedition. Dataset version 1. Bolin Centre Database. https://doi.org/10.17043/oden-ao-2018-aerosol-semi-volatile-1

References

Siegel K, Karlsson L, Zieger P, Baccarini A, Schmale J, Lawler M, Salter M, Leck C, Ekman AML, Riipinen I, Mohr C (2021) Insights into the molecular composition of semi-volatile aerosols in the summertime central Arctic Ocean using FIGAERO-CIMS. Environmental Science: Atmospheres 1, 161⁠ – ⁠175. https://doi.org/10.1039/D0EA00023J

Data description

The data are provided in one comma-separated values (csv) file containing concentrations of the detected molecules in the aerosol samples, determined using FIGAERO-HRToF-CIMS. The filter samples are referred to as F1⁠ – ⁠F13 (Filter #1 – Filter #13, where F6 was not analysed by FIGAERO-HRToF-CIMS but kept for other analyses and thus not included here).

Data file structure and content

• Column 1: Chemical formula of fitted compound with reagent ion (iodide, I-) included.
• Column 2: Mass-to-charge (m/z) ratio [amu] in the mass spectrum of the fitted peak.
• Columns 3⁠ – ⁠14: Molar mass-weighted signal per sampled volume of air [kg/m³], NOT atmospheric concentration) of F1⁠ – ⁠F13. The signal was obtained by subtracting the instrument background of each sample and an average background of the field/handling blanks. Empty fields correspond to values below LOD (7.06e-22 kg/m³).
• Column 15: Median signal of all filters (same unit as F1⁠ – ⁠F13). Only values above LOD were included in the median.

NOTE! Only formulas with FilterMedian signal above LOD are found in the file.

The FIGAERO-HRToF-CIMS was developed by Aerodyne Research Inc., USA.

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 creators Karolina Siegel and Claudia Mohr have ORCID accounts.

The Arctic Ocean 2018 expedition was organized by the Swedish Polar Research Secretariat. See the expedition website and the MOCCHA project website.