 |
| Titel |
Spatial and temporal variability in summer snow pack in Dronning Maud Land, Antarctica |
| VerfasserIn |
T. Vihma, O.-P. Mattila, R. Pirazzini, M. M. Johansson |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1994-0416
|
| Digitales Dokument |
URL |
| Erschienen |
In: The Cryosphere ; 5, no. 1 ; Nr. 5, no. 1 (2011-03-10), S.187-201 |
| Datensatznummer |
250002280
|
| Publikation (Nr.) |
 copernicus.org/tc-5-187-2011.pdf |
|
|
|
|
|
| Zusammenfassung |
| To quantify the spatial and temporal variability in the snow pack, field
measurements were carried out during four summers in Dronning Maud Land,
Antarctica. Data from a 310-km-long transect revealed the largest horizontal
gradients in snow density, temperature, and hardness in the escarpment
region. On the local scale, day-to-day temporal variability dominated the
standard deviation of snow temperature, while the diurnal cycle was of
second significance, and horizontal variability on the scale of 0.4 to 10 m
was least important. In the uppermost 0.2 m, the snow temperature was
correlated with the air temperature over the previous 6–12 h, whereas at the
depths of 0.3 to 0.5 m the most important time scale was 3 days. Cloud cover
and radiative fluxes affected the snow temperature in the uppermost 0.30 m and the snow density in the uppermost 0.10 m. Both on the intra-pit and
transect scales, the ratio of horizontal to temporal variability increased
with depth. The horizontal standard deviation of snow density increased
rapidly between the scales of 0.4 and 2 m, and more gradually from 10 to 100 m.
Inter-annual variations in snow temperature and density were due to
inter-annual differences in air temperature and the timing of the
precipitation events. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|