 |
| Titel |
Is snow sublimation important in the alpine water balance? |
| VerfasserIn |
U. Strasser, M. Bernhardt, M. Weber, G. E. Liston, W. Mauser |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1994-0416
|
| Digitales Dokument |
URL |
| Erschienen |
In: The Cryosphere ; 2, no. 1 ; Nr. 2, no. 1 (2008-05-23), S.53-66 |
| Datensatznummer |
250000416
|
| Publikation (Nr.) |
 copernicus.org/tc-2-53-2008.pdf |
|
|
|
|
|
| Zusammenfassung |
| In alpine terrain, snow sublimation represents an important component of the
winter moisture budget, representing a proportion of precipitation which
does not contribute to melt. To quantify its amount we analyze the spatial
pattern of snow sublimation at the ground, from a canopy and from turbulent
suspension during wind-induced snow transport for a high alpine area in the
Berchtesgaden National Park (Germany), and we discuss the efficiency of
these processes with respect to seasonal snowfall. Therefore, we utilized
interpolated meteorological recordings from a network of automatic stations,
and a distributed simulation framework comprising validated, physically
based models. The applied simulation tools were: a detailed model for
shortwave and longwave radiative fluxes, a mass and energy balance model for
the ground snow cover, a model for the microclimatic conditions within a
forest canopy and related snow-vegetation interactions including snow
sublimation from the surface of the trees, and a model for the simulation of
wind-induced snow transport and related sublimation from suspended snow
particles. For each of the sublimation processes, mass rates were quantified
and aggregated over an entire winter season. Sublimation from the ground and
from most canopy types are spatially relatively homogeneous and sum up to
about 100 mm of snow water equivalent (SWE) over the winter period.
Accumulated seasonal sublimation due to turbulent suspension is small in the
valley areas, but can locally, at very wind-exposed mountain ridges, add up
to more than 1000 mm of SWE. The fraction of these sublimation losses of
winter snowfall is between 10 and 90%. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|