Snow Transport Over Mountain Crests
Abstract In order to gain more insight into the mountain snow-transport mechanisms wind and drift flux measurements have been executed on a ridge crest (mainly during snow-storms). Horizontal wind-speed profiles, measured between 0.3 and 6 m above snow surface, show a hump-shaped course especially f...
Published in: | Journal of Glaciology |
---|---|
Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
1980
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1017/s0022143000010984 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000010984 |
id |
crcambridgeupr:10.1017/s0022143000010984 |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1017/s0022143000010984 2024-03-03T08:46:02+00:00 Snow Transport Over Mountain Crests Föhn, Paul M. B. 1980 http://dx.doi.org/10.1017/s0022143000010984 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000010984 en eng Cambridge University Press (CUP) Journal of Glaciology volume 26, issue 94, page 469-480 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1980 crcambridgeupr https://doi.org/10.1017/s0022143000010984 2024-02-08T08:40:37Z Abstract In order to gain more insight into the mountain snow-transport mechanisms wind and drift flux measurements have been executed on a ridge crest (mainly during snow-storms). Horizontal wind-speed profiles, measured between 0.3 and 6 m above snow surface, show a hump-shaped course especially for strong winds. Theoretical approximations substantiate that the Bernoullian pressure decrease on the crest may be the main cause for this type of wind profile. Roughness parameters (Z 0 , u ⋆ ) are determined with the aid of the wind profiles and compared with those reported in the literature. Corresponding drift density profiles coincide with steady-state drift theories as long as wind speeds are low (u 1 ≤ 7-10 m s -1 ), at greater wind speeds snow plumes of 1 to 1.5 m thickness develop immediately above snow surface. Areal measurements on snow mass-balance differences between windward and lee slopes are used to approximate the total transport over the ridge crest and to derive a quantitative relationship between crest winds and drift-snow deposition on lee slopes. Article in Journal/Newspaper Journal of Glaciology Cambridge University Press Journal of Glaciology 26 94 469 480 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Föhn, Paul M. B. Snow Transport Over Mountain Crests |
topic_facet |
Earth-Surface Processes |
description |
Abstract In order to gain more insight into the mountain snow-transport mechanisms wind and drift flux measurements have been executed on a ridge crest (mainly during snow-storms). Horizontal wind-speed profiles, measured between 0.3 and 6 m above snow surface, show a hump-shaped course especially for strong winds. Theoretical approximations substantiate that the Bernoullian pressure decrease on the crest may be the main cause for this type of wind profile. Roughness parameters (Z 0 , u ⋆ ) are determined with the aid of the wind profiles and compared with those reported in the literature. Corresponding drift density profiles coincide with steady-state drift theories as long as wind speeds are low (u 1 ≤ 7-10 m s -1 ), at greater wind speeds snow plumes of 1 to 1.5 m thickness develop immediately above snow surface. Areal measurements on snow mass-balance differences between windward and lee slopes are used to approximate the total transport over the ridge crest and to derive a quantitative relationship between crest winds and drift-snow deposition on lee slopes. |
format |
Article in Journal/Newspaper |
author |
Föhn, Paul M. B. |
author_facet |
Föhn, Paul M. B. |
author_sort |
Föhn, Paul M. B. |
title |
Snow Transport Over Mountain Crests |
title_short |
Snow Transport Over Mountain Crests |
title_full |
Snow Transport Over Mountain Crests |
title_fullStr |
Snow Transport Over Mountain Crests |
title_full_unstemmed |
Snow Transport Over Mountain Crests |
title_sort |
snow transport over mountain crests |
publisher |
Cambridge University Press (CUP) |
publishDate |
1980 |
url |
http://dx.doi.org/10.1017/s0022143000010984 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000010984 |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 26, issue 94, page 469-480 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000010984 |
container_title |
Journal of Glaciology |
container_volume |
26 |
container_issue |
94 |
container_start_page |
469 |
op_container_end_page |
480 |
_version_ |
1792501840777052160 |