 |
| Titel |
Ground penetrating radar detection of subsnow slush on ice-covered lakes in interior Alaska |
| VerfasserIn |
A. Gusmeroli, G. Grosse |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1994-0416
|
| Digitales Dokument |
URL |
| Erschienen |
In: The Cryosphere ; 6, no. 6 ; Nr. 6, no. 6 (2012-12-06), S.1435-1443 |
| Datensatznummer |
250003876
|
| Publikation (Nr.) |
 copernicus.org/tc-6-1435-2012.pdf |
|
|
|
|
|
| Zusammenfassung |
| Lakes are abundant throughout the pan-Arctic region. For many of these lakes
ice cover lasts for up to two thirds of the year. The frozen cover allows
human access to these lakes, which are therefore used for many subsistence
and recreational activities, including water harvesting, fishing, and skiing.
Safe traveling condition onto lakes may be compromised, however, when, after
significant snowfall, the weight of the snow acts on the ice and causes
liquid water to spill through weak spots and overflow at the snow-ice
interface. Since visual detection of subsnow slush is almost impossible our
understanding on overflow processes is still very limited and geophysical
methods that allow water and slush detection are desirable. In this study we
demonstrate that a commercially available, lightweight 1 GHz, ground
penetrating radar system can detect and map extent and intensity of overflow.
The strength of radar reflections from wet snow-ice interfaces are at least
twice as much in strength than returns from dry snow-ice interface. The
presence of overflow also affects the quality of radar returns from the base
of the lake ice. During dry conditions we were able to profile ice thickness
of up to 1 m, conversely, we did not retrieve any ice-water returns in areas
affected by overflow. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|