experimental observation of transient δ18o interaction between snow and advective airflow under various temperature gradient conditions
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2017
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Abstract
Stable water isotopes (δ18O) obtained from snow and
ice samples of polar regions are used to reconstruct past climate
variability, but heat and mass transport processes can affect the
isotopic composition. Here we present an experimental study on the
effect of airflow on the snow isotopic composition through a snow
pack in controlled laboratory conditions. The influence of
isothermal and controlled temperature gradient conditions on the
δ18O content in the snow and interstitial water vapour
is elucidated. The observed disequilibrium between snow and vapour
isotopes led to the exchange of isotopes between snow and vapour
under non-equilibrium processes, significantly changing the
δ18O content of the snow. The type of metamorphism
of the snow had a significant influence on this process. These
findings are pertinent to the interpretation of the records of
stable isotopes of water from ice cores. These laboratory
measurements suggest that a highly resolved climate history is
relevant for the interpretation of the snow isotopic composition in
the field.
| Reference Key |
ebner2017theexperimental
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|---|---|
| Authors | ;P. P. Ebner;H. C. Steen-Larsen;H. C. Steen-Larsen;B. Stenni;M. Schneebeli;A. Steinfeld |
| Journal | journal of applied polymer science |
| Year | 2017 |
| DOI |
10.5194/tc-11-1733-2017
|
| URL | |
| Keywords |
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