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| Titel |
A triple-moment blowing snow-atmospheric model and its application in computing the seasonal wintertime snow mass budget |
| VerfasserIn |
J. Yang, M. K. Yau, X. Fang, J. W. Pomeroy |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 14, no. 6 ; Nr. 14, no. 6 (2010-06-28), S.1063-1079 |
| Datensatznummer |
250012343
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| Publikation (Nr.) |
 copernicus.org/hess-14-1063-2010.pdf |
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| Zusammenfassung |
| Many field studies have shown that surface sublimation and blowing snow
transport and sublimation have significant influences on the snow mass
budget in many high latitude regions. We developed a coupled triple-moment
blowing snow-atmospheric modeling system to study the influence of these
processes on a seasonal time scale over the Northern Hemisphere. Two
simulations were performed. The first is a 5 month simulation for comparison
with snow survey measurements over a Saskatchewan site to validate the
modeling system. The second simulation covers the 2006/2007 winter period to
study the snow mass budget over the Northern Hemisphere. The results show
that surface sublimation is significant in Eurasian Continent and the
eastern region of North America, reaching a maximum value of 200 mm SWE
(Snow Water Equivalent). Over the Arctic Ocean and Northern Canada, surface
deposition with an average value of 30 mm SWE was simulated. Blowing snow
sublimation was found to return up to 50 mm SWE back to the atmosphere over
the Arctic Ocean, while the divergence of blowing snow transport contributes
only a few mm SWE to the change in snow mass budget. The results were
further stratified in 10 degree latitudinal bands. The results show that
surface sublimation decreases with an increase in latitude while blowing
snow sublimation increases with latitude. Taken together, the surface
sublimation and blowing snow processes was found to distribute 23% to
52% of winter precipitation over the three month winter season. |
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