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Water Accommodation and Desorption Kinetics on Ice

Kong, Xiangrui; Papagiannakopoulos, Panos; Thomson, Erik S.; Markovic, Nikola and Pettersson, Jan B. C. (2014) In The Journal of Physical Chemistry Part A: Molecules, Spectroscopy, Kinetics, Environment and General Theory 118(22). p.3973-3979
Abstract
The interaction of water vapor with ice remains incompletely understood despite its importance in environmental processes. A particular concern is the probability for water accommodation on the ice surface, for which results from earlier studies vary by more than 2 orders of magnitude. Here, we apply an environmental molecular beam method to directly determine water accommodation and desorption kinetics on ice. Short D2O gas pulses collide with H2O ice between 170 and 200 K, and a fraction of the adsorbed molecules desorbs within tens of milliseconds by first order kinetics. The bulk accommodation coefficient decreases nonlinearly with increasing temperature and reaches 0.41 +/- 0.18 at 200 K. The kinetics are well described by a model... (More)
The interaction of water vapor with ice remains incompletely understood despite its importance in environmental processes. A particular concern is the probability for water accommodation on the ice surface, for which results from earlier studies vary by more than 2 orders of magnitude. Here, we apply an environmental molecular beam method to directly determine water accommodation and desorption kinetics on ice. Short D2O gas pulses collide with H2O ice between 170 and 200 K, and a fraction of the adsorbed molecules desorbs within tens of milliseconds by first order kinetics. The bulk accommodation coefficient decreases nonlinearly with increasing temperature and reaches 0.41 +/- 0.18 at 200 K. The kinetics are well described by a model wherein water molecules adsorb in a surface state from which they either desorb or become incorporated into the bulk ice structure. The weakly bound surface state affects water accommodation on the ice surface with important implications for atmospheric cloud processes. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
in
The Journal of Physical Chemistry Part A: Molecules, Spectroscopy, Kinetics, Environment and General Theory
volume
118
issue
22
pages
3973 - 3979
publisher
The American Chemical Society
external identifiers
  • scopus:84902011185
ISSN
1520-5215
DOI
10.1021/jp503504e
project
MERGE
language
English
LU publication?
no
id
0f3411b8-3531-452e-8b17-0dbf6a5b4124 (old id 4863367)
date added to LUP
2014-12-15 14:57:52
date last changed
2017-04-09 03:58:52
@article{0f3411b8-3531-452e-8b17-0dbf6a5b4124,
  abstract     = {The interaction of water vapor with ice remains incompletely understood despite its importance in environmental processes. A particular concern is the probability for water accommodation on the ice surface, for which results from earlier studies vary by more than 2 orders of magnitude. Here, we apply an environmental molecular beam method to directly determine water accommodation and desorption kinetics on ice. Short D2O gas pulses collide with H2O ice between 170 and 200 K, and a fraction of the adsorbed molecules desorbs within tens of milliseconds by first order kinetics. The bulk accommodation coefficient decreases nonlinearly with increasing temperature and reaches 0.41 +/- 0.18 at 200 K. The kinetics are well described by a model wherein water molecules adsorb in a surface state from which they either desorb or become incorporated into the bulk ice structure. The weakly bound surface state affects water accommodation on the ice surface with important implications for atmospheric cloud processes.},
  author       = {Kong, Xiangrui and Papagiannakopoulos, Panos and Thomson, Erik S. and Markovic, Nikola and Pettersson, Jan B. C.},
  issn         = {1520-5215},
  language     = {eng},
  number       = {22},
  pages        = {3973--3979},
  publisher    = {The American Chemical Society},
  series       = {The Journal of Physical Chemistry Part A: Molecules, Spectroscopy, Kinetics, Environment and General Theory},
  title        = {Water Accommodation and Desorption Kinetics on Ice},
  url          = {http://dx.doi.org/10.1021/jp503504e},
  volume       = {118},
  year         = {2014},
}