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| Titel |
AIr Pressure Data from Vallee de la Sionne |
| VerfasserIn |
Jim McElwaine, Betty Sovilla |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250098033
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| Publikation (Nr.) |
 EGU/EGU2014-13670.pdf |
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| Zusammenfassung |
| Despite their clear danger to humans, snow avalanches are hard to
document. They occur in inaccessible and dangerous locations, often
at times of bad weather. Observation instruments frequently
malfunction in the harsh conditions or are destroyed. Measurements
of powder snow avalanches are particularly difficult, as these occur
less frequently and are usually very large. To understand the air
flow in front of and inside powder snow avalanches, we have designed
an air pressure sensor to survive the harsh conditions. This has
operated for the last ten years and we report on the results from
these avalanches. We present an analysis of the sensor response and
an interpretation of the signals in terms of simple flow fields and
show how these connect to experiments and simulations. We show how
these data can be used to deduce information about the speed, size
and location of the avalanches using a dipole approximation. |
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