AMTD Atmospheric Measurement Techniques Discussions AMTD Atmos. Meas. Tech. Discuss. 1867-8610 Göttingen, Germany 10.5194/amt-2020-42 A Phase Separation Inlet for Droplets, Ice Residuals, and Interstitial Aerosols Koolik Libby https://orcid.org/0000-0001-8339-927X 1 2 3 Roesch Michael 1 4 Deloya Lesly J. Franco 1 Shen Chuanyang 1 5 Hallar A. Gannet 6 7 McCubbin Ian B. 7 Cziczo Daniel J. 1 2 8 Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Department of Civil Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Ramboll, San Francisco, CA 94111, USA Department of Environmental Systems Science, Swiss Federal Institute of Technology, ETH Zurich, Zurich, 8092, Switzerland Department of Atmospheric and Oceanic Sciences, Peking University, 100871, Beijing, China Department of Atmospheric Sciences, University of Utah, Salt Lake City, UT 84112 Storm Peak Laboratory, Desert Research Institute, Steamboat Springs, CO 8048 Department of Earth, Atmospheric and Planetary Sciences, Purdue University, West Lafayette, IN 47907 USA 27 03 2020 2020 1 28 Copyright: © 2020 Libby Koolik et al. 2020 This work is licensed under the Creative Commons Attribution 4.0 International License. To view a copy of this licence, visit https://creativecommons.org/licenses/by/4.0/ This article is available from https://amt.copernicus.org/preprints/amt-2020-42/ The full text article is available as a PDF file from https://amt.copernicus.org/preprints/amt-2020-42/amt-2020-42.pdf

<p>A new inlet for studying the aerosols and hydrometeor residuals that compose mixed-phase clouds &ndash; the phaSe seParation Inlet for Droplets icE residuals and inteRstitial aerosols (SPIDER) &ndash; is described here. SPIDER combines an omni-directional inlet, 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 aerosols for simultaneous sampling. Laboratory verification tests of each individual component and the composite SPIDER system were conducted. SPIDER was deployed to Storm Peak Laboratory (SPL), a mountain-top research facility at 3210&thinsp;m&thinsp;a.s.l. in the Rocky Mountains, for a three-week field campaign. SPIDER performance as a field instrument is presented with data that demonstrates its capability of separating distinct cloud elements and interstitial aerosol. Possible design improvements of SPIDER are also suggested.</p>

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