Drifting-snow acoustic detector: experimental tests in La Molina, Spanish Pyrennees
International audience A new gauge to detect drifting snow has been tested at an experimental site at La Molina, Eastern Spanish Pyrenees during the 1996 winter. Based on an acoustic principle, it consists of a miniature microphone located at the base of an aluminium pole of a variable length (depen...
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ftccsdartic:oai:HAL:hal-02578228v1 2023-05-15T13:29:07+02:00 Drifting-snow acoustic detector: experimental tests in La Molina, Spanish Pyrennees Détecteur acoustique de transport de neige par le vent : tests expérimentaux à la Molina, Pyrénnées Espagnoles Naaim Bouvet, F. Font, D. Roussel, M. Érosion torrentielle, neige et avalanches (UR ETGR (ETNA)) Centre national du machinisme agricole, du génie rural, des eaux et forêts (CEMAGREF) 1998 https://hal.inrae.fr/hal-02578228 en eng HAL CCSD International Glaciological Society hal-02578228 https://hal.inrae.fr/hal-02578228 IRSTEA: PUB00005754 ISSN: 0260-3055 Annals of Glaciology https://hal.inrae.fr/hal-02578228 Annals of Glaciology, International Glaciological Society, 1998, pp.221-224 [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 1998 ftccsdartic 2021-04-17T22:43:21Z International audience A new gauge to detect drifting snow has been tested at an experimental site at La Molina, Eastern Spanish Pyrenees during the 1996 winter. Based on an acoustic principle, it consists of a miniature microphone located at the base of an aluminium pole of a variable length (depending on the average height of the snow accumulated in a season). While snowdrifting occurs and the pole is exposed to the flux (wind + particles), the snow grains impact on the pole and the sound produced by these collisions is recorded as an electrical signal. 30 m away from the snowdrifting detector, there is an anemometric station. The comparison of both records allows determination of threeshold and deposit wind velocities. In addition, this gauge allows users to know, during a wind episode, the exact amount of time during which snowdrifting occurs without beeing in the field. The interpretation of the values obtained using the acoustic detector is not yet an easy subject to discuss. We still do not know what the drift-density equivalents for the recorded noise levels are. However, these are only preliminary results and we expect to complete the calibration of gauge during the coming months. Un nouveau détecteur de transport de neige par le vent a été testé sur le site expérimental de La Molina dans la partie orientale des Pyrénées espagnoles pendant l'hiver 1996. Basé sur un principe acoustique, il comporte un microphone miniature situé à la base d'un mât en aluminium d'une longueur variable (en fonction de la hauteur moyenne de la neige accumulée en une saison). Tandis que la neige est transportée et que le mât est exposé au flux (vent + particules), les flocons de neige heurtent le mât et le son produit par ces chocs est enregistré sous forme de signal électrique. Une station anémométrique est installée à 30 m du détecteur de transport de neige par le vent. La comparaison des deux relevés permet de déterminer le seuil et la vitesse de dépôt. De plus, ce calibre permet aux utilisateurs de savoir l'exacte ... Article in Journal/Newspaper Annals of Glaciology Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Molina ENVELOPE(-62.017,-62.017,-64.017,-64.017) |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDE]Environmental Sciences |
spellingShingle |
[SDE]Environmental Sciences Naaim Bouvet, F. Font, D. Roussel, M. Drifting-snow acoustic detector: experimental tests in La Molina, Spanish Pyrennees |
topic_facet |
[SDE]Environmental Sciences |
description |
International audience A new gauge to detect drifting snow has been tested at an experimental site at La Molina, Eastern Spanish Pyrenees during the 1996 winter. Based on an acoustic principle, it consists of a miniature microphone located at the base of an aluminium pole of a variable length (depending on the average height of the snow accumulated in a season). While snowdrifting occurs and the pole is exposed to the flux (wind + particles), the snow grains impact on the pole and the sound produced by these collisions is recorded as an electrical signal. 30 m away from the snowdrifting detector, there is an anemometric station. The comparison of both records allows determination of threeshold and deposit wind velocities. In addition, this gauge allows users to know, during a wind episode, the exact amount of time during which snowdrifting occurs without beeing in the field. The interpretation of the values obtained using the acoustic detector is not yet an easy subject to discuss. We still do not know what the drift-density equivalents for the recorded noise levels are. However, these are only preliminary results and we expect to complete the calibration of gauge during the coming months. Un nouveau détecteur de transport de neige par le vent a été testé sur le site expérimental de La Molina dans la partie orientale des Pyrénées espagnoles pendant l'hiver 1996. Basé sur un principe acoustique, il comporte un microphone miniature situé à la base d'un mât en aluminium d'une longueur variable (en fonction de la hauteur moyenne de la neige accumulée en une saison). Tandis que la neige est transportée et que le mât est exposé au flux (vent + particules), les flocons de neige heurtent le mât et le son produit par ces chocs est enregistré sous forme de signal électrique. Une station anémométrique est installée à 30 m du détecteur de transport de neige par le vent. La comparaison des deux relevés permet de déterminer le seuil et la vitesse de dépôt. De plus, ce calibre permet aux utilisateurs de savoir l'exacte ... |
author2 |
Érosion torrentielle, neige et avalanches (UR ETGR (ETNA)) Centre national du machinisme agricole, du génie rural, des eaux et forêts (CEMAGREF) |
format |
Article in Journal/Newspaper |
author |
Naaim Bouvet, F. Font, D. Roussel, M. |
author_facet |
Naaim Bouvet, F. Font, D. Roussel, M. |
author_sort |
Naaim Bouvet, F. |
title |
Drifting-snow acoustic detector: experimental tests in La Molina, Spanish Pyrennees |
title_short |
Drifting-snow acoustic detector: experimental tests in La Molina, Spanish Pyrennees |
title_full |
Drifting-snow acoustic detector: experimental tests in La Molina, Spanish Pyrennees |
title_fullStr |
Drifting-snow acoustic detector: experimental tests in La Molina, Spanish Pyrennees |
title_full_unstemmed |
Drifting-snow acoustic detector: experimental tests in La Molina, Spanish Pyrennees |
title_sort |
drifting-snow acoustic detector: experimental tests in la molina, spanish pyrennees |
publisher |
HAL CCSD |
publishDate |
1998 |
url |
https://hal.inrae.fr/hal-02578228 |
long_lat |
ENVELOPE(-62.017,-62.017,-64.017,-64.017) |
geographic |
Molina |
geographic_facet |
Molina |
genre |
Annals of Glaciology |
genre_facet |
Annals of Glaciology |
op_source |
ISSN: 0260-3055 Annals of Glaciology https://hal.inrae.fr/hal-02578228 Annals of Glaciology, International Glaciological Society, 1998, pp.221-224 |
op_relation |
hal-02578228 https://hal.inrae.fr/hal-02578228 IRSTEA: PUB00005754 |
_version_ |
1765998530204270592 |