Preprints
https://doi.org/10.5194/amt-2021-26
https://doi.org/10.5194/amt-2021-26

  18 Mar 2021

18 Mar 2021

Review status: this preprint is currently under review for the journal AMT.

A Phase Separation Inlet for Droplets, Ice Residuals, and Interstitial Aerosol Particles

Libby Koolik1,2,3, Michael Roesch1,4, Lesly J. Franco Deloya1, Chuanyang Shen1,5, A. Gannet Hallar6,7, Ian B. McCubbin7, and Daniel J. Cziczo1,2,8 Libby Koolik et al.
  • 1Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
  • 2Department of Civil Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
  • 3Ramboll, San Francisco, CA 94111 USA
  • 4Department of Environmental Systems Science, Swiss Federal Institute of Technology, ETH Zurich, Zurich, 8092, Switzerland
  • 5Department of Atmospheric and Oceanic Sciences, Peking University, 100871, Beijing, China
  • 6Department of Atmospheric Sciences, University of Utah, Salt Lake City, UT 84112
  • 7Storm Peak Laboratory, Desert Research Institute, Steamboat Springs, CO 80488
  • 8Department of Earth, Atmospheric, and Planetary Sciences, Purdue University, West Lafayette, IN 47907, USA

Abstract. A new inlet for studying the aerosol particles and hydrometeor residuals that compose mixed-phase clouds – the phaSe seParation Inlet for Droplets icE residuals and inteRstitial aerosol particles (SPIDER) – is described here. SPIDER combines a Large-Pumped Counterflow Virtual Impactor (L-PCVI), a flow tube evaporation chamber, and a Pumped Counterflow Virtual Impactor (PCVI) to separate droplets, ice crystals, and interstitial aerosol particles for simultaneous sampling. Laboratory verification tests of each individual component and then the composite SPIDER system were conducted. SPIDER was then deployed at Storm Peak Laboratory (SPL), a mountain-top research facility at 3210 m a.s.l. in the Rocky Mountains. SPIDER performance as a field instrument is presented with data that demonstrates its capability of separating cloud elements and interstitial aerosol particle. Possible design improvements of SPIDER are also suggested.

Libby Koolik et al.

Status: open (until 02 Aug 2021)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on amt-2021-26', Anonymous Referee #1, 04 May 2021 reply

Libby Koolik et al.

Libby Koolik et al.

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Short summary
A new inlet for studying the small particles, droplets and ice crystals that compose mixed-phase clouds has been constructed and is described here. This new inlet was then deployed at Storm Peak Laboratory, a mountain-top research facility in Colorado and within the Rocky Mountains. We present the performance of the new inlet to demonstrates its capability of separating ice, droplets and small particles.