Murray, BJ, Malkin, TL and Salzmann, CG (2015) The crystal structure of ice under mesospheric conditions. Journal of Atmospheric and Solar-Terrestrial Physics, 127. 78 - 82. ISSN 1364-6826
Abstract
Ice clouds form in the summer high latitude mesopause region, which is the coldest part of the Earth's atmosphere. At these very low temperatures (<150K) ice can exist in metastable forms, but the nature of these ices remains poorly understood. In this paper we show that ice which is grown at mesospherically relevant temperatures does not have a structure corresponding to the well-known hexagonal form or the metastable cubic form. Instead, the ice which forms under mesospheric conditions is a material in which cubic and hexagonal sequences of ice are randomly arranged to produce stacking disordered ice (ice Isd). The structure of this ice is in the trigonal crystal system, rather than the cubic or hexagonal systems, and is expected to produce crystals with aspect ratios consistent with lidar observations.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | (c) 2014, The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/3.0/). |
Keywords: | Mesospheric clouds; Noctilucent clouds; Amorphous ice; Amorphous solid water; Stacking disordered ice; Cubic ice |
Dates: |
|
Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) > Inst for Climate & Atmos Science (ICAS) (Leeds) The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemistry (Leeds) > Physical Chemistry (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 28 Jul 2015 15:25 |
Last Modified: | 01 Mar 2019 12:06 |
Published Version: | http://dx.doi.org/10.1016/j.jastp.2014.12.005 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.jastp.2014.12.005 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:86857 |