1. The SPectrometer for Ice Nuclei (SPIN): an instrument to investigate ice nucleation
- Author
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Frank Sagan, Michael Rösch, Jens Voigtländer, Gregory Lee Kok, Amélie Kirchgäßner, Thomas Bjerring Kristensen, T. W. Wilson, Daniel J. Cziczo, Sarvesh Garimella, Luis A. Ladino, Jon Abbatt, K. Ignatius, Daniel Rothenberg, Russell S. Ladkin, James Dorsey, Frank Stratmann, Olaf Stetzer, Gourihar Kulkarni, Ulrike Lohmann, Leonid Nichman, Heike Wex, André Welti, Garimella, Sarvesh, Rothenberg, Daniel Alexander, Roesch, Michael, and Cziczo, Daniel James
- Subjects
Atmospheric Science ,Haze ,Spectrometer ,010504 meteorology & atmospheric sciences ,Chemistry ,lcsh:TA715-787 ,Physics::Instrumentation and Detectors ,lcsh:Earthwork. Foundations ,Nucleation ,Analytical chemistry ,Silver iodide ,010501 environmental sciences ,Molecular physics ,01 natural sciences ,lcsh:Environmental engineering ,chemistry.chemical_compound ,Ice nucleus ,Particle ,Astrophysics::Earth and Planetary Astrophysics ,lcsh:TA170-171 ,Particle counter ,Physics::Atmospheric and Oceanic Physics ,Spin-½ ,0105 earth and related environmental sciences - Abstract
The SPectrometer for Ice Nuclei (SPIN) is a commercially available ice nucleating particle (INP) counter manufactured by Droplet Measurement Technologies in Boulder, CO. The SPIN is a continuous flow diffusion chamber with parallel plate geometry based on the Zurich Ice Nucleation Chamber and the Portable Ice Nucleation Chamber. This study presents a standard description for using the SPIN instrument and also highlights methods to analyze measurements in more advanced ways. It characterizes and describes the behavior of the SPIN chamber, reports data from laboratory measurements, and quantifies uncertainties associated with the measurements. Experiments with ammonium sulfate are used to investigate homogeneous freezing of deliquesced haze droplets and droplet breakthrough. Experiments with kaolinite, NX illite, and silver iodide are used to investigate heterogeneous ice nucleation. SPIN nucleation results are compared to those from the literature. A machine learning approach for analyzing depolarization data from the SPIN optical particle counter is also presented (as an advanced use). Overall, we report that the SPIN is able to reproduce previous INP counter measurements., Atmospheric Measurement Techniques, 9 (7), ISSN:1867-1381, ISSN:1867-8548
- Published
- 2016
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