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| Titel |
Trace gas - ice interaction measurements with microstructure control |
| VerfasserIn |
Erik S. Thomson, Thorsten Bartels-Rausch, Fabienne Riche, Martin Schneebeli, Markus Ammann |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250078602
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| Zusammenfassung |
| The surfaces of snow and ice have significant impact on the physicochemistry and thus
chemical budgets of near-surface air. In these environments the availability of chemical
species depends sensitively on the structural character of the snowpack and its transport
parameters. As a result the thermodynamic and kinetic characteristics of trace gas
– ice interactions are of fundamental interest and have potential implications in
geochemical cycling and climate. We have developed a unique experimental method for
measuring trace gas – ice interactions with careful control of ice microstructure. More
specifically, the grain size at the ice-air interface can be varied and analyzed. The new Ice
Flow Tubes allow us to sensitively explore the temperature dependence of trace gas
– ice interactions with a high resolution and minimal foreign body surfaces. In
preliminary experiments H2O2 has been used to successfully demonstrate the working
principle, and results are indicative of the power and utility of the new method. |
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