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| Titel |
Blowing snow in coastal Adélie Land, Antarctica: three atmospheric-moisture issues |
| VerfasserIn |
H. Barral, C. Genthon, A. Trouvilliez, C. Brun, C. Amory |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1994-0416
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| Digitales Dokument |
URL |
| Erschienen |
In: The Cryosphere ; 8, no. 5 ; Nr. 8, no. 5 (2014-10-22), S.1905-1919 |
| Datensatznummer |
250116327
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| Publikation (Nr.) |
 copernicus.org/tc-8-1905-2014.pdf |
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| Zusammenfassung |
| A total of 3 years of blowing-snow observations and associated meteorology along a
7 m mast at site D17 in coastal Adélie Land are presented. The
observations are used to address three atmospheric-moisture issues related to the
occurrence of blowing snow, a feature which largely affects many regions of
Antarctica: (1) blowing-snow sublimation raises the moisture content of the surface atmosphere close to saturation, and atmospheric models and
meteorological analyses that do not carry blowing-snow parameterizations are
affected by a systematic dry bias; (2) while snowpack modelling with a
parameterization of surface-snow erosion by wind can reproduce the
variability of snow accumulation and ablation, ignoring the high levels of
atmospheric-moisture content associated with blowing snow results in
overestimating surface sublimation, affecting the energy budget of the
snowpack; (3) the well-known profile method of calculating turbulent moisture
fluxes is not applicable when blowing snow occurs, because moisture gradients
are weak due to blowing-snow sublimation, and the impact of measurement
uncertainties are strongly amplified in the case of strong winds. |
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