- Library Home /
- Search Collections /
- Open Collections /
- Browse Collections /
- UBC Faculty Research and Publications /
- Measurements of the vapor pressure of cubic ice and...
Open Collections
UBC Faculty Research and Publications
Measurements of the vapor pressure of cubic ice and their implications for atmospheric ice clouds. Shilling, J. E.; Tolbert, M. A.; Toon, O. B.; Jensen, E. J.; Murray, Benjamin J.; Bertram, Allan K.
Abstract
Under conditions commonly found in Earth's atmosphere, water can form two solid phases; hexagonal ice (Ih) and cubic ice (Ic). Recent reports have suggested that Ic may form in the atmosphere under a wider range of conditions than previously believed. In light of these reports, the formation of Ic has been suggested as one contributing factor for in-situ observations of persistent in-cloud supersaturations in cold cirrus. However, an accurate evaluation of the contribution of Ic formation to the observed supersaturations requires knowledge of the saturation vapor pressure of Ic, which has not been measured. In this manuscript, we report direct measurements of the vapor pressure of Ic over the temperature range 180-190 K. Over this temperature range, the vapor pressure of the cubic phase is 10.5 ± 2.5% higher than that of the hexagonal phase. Field measurements of in-cloud supersaturations made during CRYSTAL-FACE are also re-analyzed and discussed. An edited version of this paper was published by AGU. Copyright 20060 American Geophysical Union.
Item Metadata
Title |
Measurements of the vapor pressure of cubic ice and their implications for atmospheric ice clouds.
|
Creator | |
Publisher |
American Geophysical Union
|
Date Issued |
2006-09
|
Description |
Under conditions commonly found in Earth's atmosphere, water can form two solid phases; hexagonal ice (Ih) and cubic ice (Ic). Recent reports have suggested that Ic may
form in the atmosphere under a wider range of conditions than previously believed. In light of these reports, the formation of Ic has been suggested as one contributing
factor for in-situ observations of persistent in-cloud supersaturations in cold cirrus. However, an accurate evaluation of the contribution of Ic formation to the observed
supersaturations requires knowledge of the saturation vapor pressure of Ic, which has not been measured. In this manuscript, we report direct measurements of the vapor
pressure of Ic over the temperature range 180-190 K. Over this temperature range, the vapor pressure of the cubic phase is 10.5 ± 2.5% higher than that of the hexagonal
phase. Field measurements of in-cloud supersaturations made during CRYSTAL-FACE are also re-analyzed and discussed. An edited version of this paper was published by AGU. Copyright 20060 American Geophysical Union.
|
Genre | |
Type | |
Language |
eng
|
Date Available |
2016-11-07
|
Provider |
Vancouver : University of British Columbia Library
|
Rights |
Attribution-NonCommercial-NoDerivatives 4.0 International
|
DOI |
10.14288/1.0041869
|
URI | |
Affiliation | |
Citation |
Shilling, J.E., Tolbert, M.A., Toon, O.B., Jensen, E.J., Murray, B.J., Bertram, A.K. 2006. Measurements of the vapor pressure of cubic ice and their implications for atmospheric ice clouds. Geophysical Research Letters 33(17) L17801
|
Publisher DOI |
10.1029/2006GL026671
|
Peer Review Status |
Reviewed
|
Scholarly Level |
Faculty
|
Copyright Holder |
Bertram, Allan K.
|
Rights URI | |
Aggregated Source Repository |
DSpace
|
Item Media
Item Citations and Data
Rights
Attribution-NonCommercial-NoDerivatives 4.0 International