Articles | Volume 20, issue 2
https://doi.org/10.5194/acp-20-1089-2020
https://doi.org/10.5194/acp-20-1089-2020
Research article
 | 
28 Jan 2020
Research article |  | 28 Jan 2020

No anomalous supersaturation in ultracold cirrus laboratory experiments

Benjamin W. Clouser, Kara D. Lamb, Laszlo C. Sarkozy, Jan Habig, Volker Ebert, Harald Saathoff, Ottmar Möhler, and Elisabeth J. Moyer

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Subject: Clouds and Precipitation | Research Activity: Laboratory Studies | Altitude Range: Troposphere | Science Focus: Physics (physical properties and processes)
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Cited articles

Amaya, A. J., Pathak, H., Modak, V. P., Laksmono, H., Loh, N. D., Sellberg, J. A., Sierra, R. G., McQueen, T. A., Hayes, M. J., Williams, G. J., Messerschmidt, M., Boutet, S., Bogan, M. J., Nilsson, A., Stan, C. A., and Wyslouzil, B. E.: How Cubic Can Ice Be?, J. Phys. Chem. Lett., 8, 3216–3222, https://doi.org/10.1021/acs.jpclett.7b01142, 2017. a
Bogdan, A. and Molina, M. J.: Aqueous Aerosol May Build Up an Elevated Upper Tropospheric Ice Supersaturation and Form Mixed-Phase Particles after Freezing, J. Phys. Chem. A, 114, 2821–2829, https://doi.org/10.1021/jp9086656, 2010.  a
Brewer, A. W.: Evidence for a world circulation provided by the measurements of helium and water vapour distribution in the stratosphere, Q. J. Roy. Meteorol. Soc., 75, 351–363, https://doi.org/10.1002/qj.49707532603, 1949. a
Buchholz, B. and Ebert, V.: Offsets in fiber-coupled diode laser hygrometers caused by parasitic absorption effects and their prevention, Meas. Sci. Technol., 25, 075501, https://doi.org/10.1088/0957-0233/25/7/075501, 2014. a
Clouser, B.: ChiWIS H2O data from the IsoCloud4 Campaign, https://doi.org/10.6082/uchicago.2132, 2020. a
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Short summary
Previous measurements of water vapor in the upper troposphere and lower stratosphere (UT/LS) have shown unexpectedly high concentrations of water vapor in ice clouds, which may be due to an incomplete understanding of the structure of ice and the behavior of ice growth in this part of the atmosphere. Water vapor measurements during the 2013 IsoCloud campaign at the AIDA cloud chamber show no evidence of this anomalous supersaturation in conditions similar to the real atmosphere.
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