03 Feb 2022
03 Feb 2022
Status: a revised version of this preprint is currently under review for the journal ACP.

Technical Note: A High-Resolution Autonomous Record of Ice Nuclei Concentrations for Fall and Winter at Storm Peak Laboratory

Anna L. Hodshire1, Ezra J. T. Levin1, A. Gannet Hallar2, Christopher N. Rapp3, Dan R. Gilchrist2, Ian McCubbin2, and Gavin R. McMeeking1 Anna L. Hodshire et al.
  • 1Handix Scientific Inc., Fort Collins, CO, 80526, USA
  • 2Department of Atmospheric Sciences, University of Utah, Salt Lake City, UT, 84112, USA
  • 3Department of Earth, Atmospheric, and Planetary Sciences, Purdue University, West Lafayette, IN, 47907, USA

Abstract. High-resolution, long-term measurements of ice nucleating particles (INPs) have been impeded by complex instrumentation that requires a trained on-site technician to operate or analyze offline. We have significantly updated the well-characterized continuous flow diffusion chamber (CFDC) instrument to run autonomously with minimal in-person handling and easy remote access. This new CFDC, the CFDC-Ice Activation Spectrometer (CFDC-IAS) was deployed for four months (October 2020–January 2021) at the mountain-top Storm Peak Laboratory site in Colorado and provided 5-minute resolution measurements daily at target temperatures of −20, −25, and −30 °C. Concentrations of INPs across all temperatures had a median value of 6 per standard liter (sL−1), and a mean of 10 sL−1 with a range of ~0–470 sL−1.

Anna L. Hodshire et al.

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on acp-2022-29', Gabor Vali, 19 Feb 2022
  • RC2: 'Comment on acp-2022-29', Anonymous Referee #2, 24 Feb 2022
  • RC3: 'Comment on acp-2022-29', Anonymous Referee #3, 27 Feb 2022
  • AC1: 'Comment on acp-2022-29', Anna Hodshire, 10 May 2022

Anna L. Hodshire et al.

Anna L. Hodshire et al.


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Short summary
The new Continuous Flow Diffusion Chamber-Ice Activation Spectrometer collected 4 months of ice nucleating particle (INP) measurements at a 5-minute resolution at the mountainside Storm Peak Laboratory. Most long-term INP measurements are at a time resolution of a day or longer: our instrument is a promising advance towards high-resolution long-term INP measurements. We observe higher peak INP concentrations than previous mountain studies, possibly due to the higher time resolution of our data.