Revealing the chemical characteristics of Arctic low-level cloud residuals – in situ observations from a mountain site ...

• Main Authors: Gramlich, Yvette, Siegel, Karolina, Haslett, Sophie L., Freitas, Gabriel, Krejci, Radovan, Zieger, Paul, Mohr, Claudia
• Format: Article in Journal/Newspaper
• Language: English
• Published: ETH Zurich 2023
• Subjects: Arctic; Ny Ålesund; Ny-Ålesund; Svalbard
• Online Access: https://dx.doi.org/10.3929/ethz-b-000656809; http://hdl.handle.net/20.500.11850/656809

The role aerosol chemical composition plays in Arctic low-level cloud formation is still poorly understood. In this study we address this issue by combining in situ observations of the chemical characteristics of cloud residuals (dried liquid cloud droplets or ice crystals) and aerosol particles from the Zeppelin Observatory in Ny-Ålesund, Svalbard (approx. 480 m a.s.l.). These measurements were part of the 1-year-long Ny-Ålesund Aerosol and Cloud Experiment 2019–2020 (NASCENT). To obtain the chemical composition of cloud residuals at molecular level, we deployed a Filter Inlet for Gases and AEROsols coupled to a Chemical Ionization Mass Spectrometer (FIGAERO-CIMS) with iodide as the reagent ion behind a ground-based counterflow virtual impactor (GCVI). The station was enshrouded in clouds roughly 15 % of the time during NASCENT, out of which we analyzed 14 cloud events between December 2019 and December 2020. During the entire year, the composition of the cloud residuals shows contributions from oxygenated ... : Atmospheric Chemistry and Physics, 23 (12) ...