Observations of an atmospheric gravity wave by shear instability in katabatic wind at Mizuho Station, East Antarctica
P(論文) Measurements were made of vertical wind speed components, using two sonic anemothermometers on the snow surface at Mizuho Station in 1980 by the present authors who were members of the 21st Japanese Antarctic Research Expedition (JARE-21). The two anemothermometers were mounted at the fixed he...
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ftnipr:oai:nipr.repo.nii.ac.jp:00001329 2024-09-09T19:06:27+00:00 Observations of an atmospheric gravity wave by shear instability in katabatic wind at Mizuho Station, East Antarctica Kobayashi, Shun'ichi Ishikawa, Nobuyoshi Ohata, Tetsuo Kawaguchi, Sadao 1982-12 application/pdf https://nipr.repo.nii.ac.jp/record/1329/files/KJ00000011963.pdf eng eng Memoirs of National Institute of Polar Research. Special issue 24 46 56 AA00733561 https://nipr.repo.nii.ac.jp/record/1329/files/KJ00000011963.pdf 1982 ftnipr 2024-06-17T04:00:33Z P(論文) Measurements were made of vertical wind speed components, using two sonic anemothermometers on the snow surface at Mizuho Station in 1980 by the present authors who were members of the 21st Japanese Antarctic Research Expedition (JARE-21). The two anemothermometers were mounted at the fixed heights of 3m and 30m on a 30-m-high micrometeorological tower. The existence of shear instability (Kelvin-Helmholtz) waves with period of about 20s was revealed as a result. The maximum aplitude of the K-H waves was found when the surface layer had a local gradient Richardson number smaller than 0.25; the instability regime was in agreement with DRAZIN's criterion (J. Fluid. Mech., 4,214,1958). Such gravity waves were observed when a strong surface inversion was progressing above the snow surface after the katabatic wind had been disturbed by a synoptic scale disturbance. departmental bulletin paper Other/Unknown Material Antarc* Antarctic Antarctica East Antarctica Memoirs of National Institute of Polar Research Polar Research National Institute of Polar Research Repository, Japan Antarctic East Antarctica Mizuho ENVELOPE(44.317,44.317,-70.683,-70.683) Mizuho Station ENVELOPE(44.317,44.317,-70.683,-70.683) Tower The ENVELOPE(-58.479,-58.479,-62.215,-62.215) |
institution |
Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
description |
P(論文) Measurements were made of vertical wind speed components, using two sonic anemothermometers on the snow surface at Mizuho Station in 1980 by the present authors who were members of the 21st Japanese Antarctic Research Expedition (JARE-21). The two anemothermometers were mounted at the fixed heights of 3m and 30m on a 30-m-high micrometeorological tower. The existence of shear instability (Kelvin-Helmholtz) waves with period of about 20s was revealed as a result. The maximum aplitude of the K-H waves was found when the surface layer had a local gradient Richardson number smaller than 0.25; the instability regime was in agreement with DRAZIN's criterion (J. Fluid. Mech., 4,214,1958). Such gravity waves were observed when a strong surface inversion was progressing above the snow surface after the katabatic wind had been disturbed by a synoptic scale disturbance. departmental bulletin paper |
author |
Kobayashi, Shun'ichi Ishikawa, Nobuyoshi Ohata, Tetsuo Kawaguchi, Sadao |
spellingShingle |
Kobayashi, Shun'ichi Ishikawa, Nobuyoshi Ohata, Tetsuo Kawaguchi, Sadao Observations of an atmospheric gravity wave by shear instability in katabatic wind at Mizuho Station, East Antarctica |
author_facet |
Kobayashi, Shun'ichi Ishikawa, Nobuyoshi Ohata, Tetsuo Kawaguchi, Sadao |
author_sort |
Kobayashi, Shun'ichi |
title |
Observations of an atmospheric gravity wave by shear instability in katabatic wind at Mizuho Station, East Antarctica |
title_short |
Observations of an atmospheric gravity wave by shear instability in katabatic wind at Mizuho Station, East Antarctica |
title_full |
Observations of an atmospheric gravity wave by shear instability in katabatic wind at Mizuho Station, East Antarctica |
title_fullStr |
Observations of an atmospheric gravity wave by shear instability in katabatic wind at Mizuho Station, East Antarctica |
title_full_unstemmed |
Observations of an atmospheric gravity wave by shear instability in katabatic wind at Mizuho Station, East Antarctica |
title_sort |
observations of an atmospheric gravity wave by shear instability in katabatic wind at mizuho station, east antarctica |
publishDate |
1982 |
url |
https://nipr.repo.nii.ac.jp/record/1329/files/KJ00000011963.pdf |
long_lat |
ENVELOPE(44.317,44.317,-70.683,-70.683) ENVELOPE(44.317,44.317,-70.683,-70.683) ENVELOPE(-58.479,-58.479,-62.215,-62.215) |
geographic |
Antarctic East Antarctica Mizuho Mizuho Station Tower The |
geographic_facet |
Antarctic East Antarctica Mizuho Mizuho Station Tower The |
genre |
Antarc* Antarctic Antarctica East Antarctica Memoirs of National Institute of Polar Research Polar Research |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Memoirs of National Institute of Polar Research Polar Research |
op_relation |
Memoirs of National Institute of Polar Research. Special issue 24 46 56 AA00733561 https://nipr.repo.nii.ac.jp/record/1329/files/KJ00000011963.pdf |
_version_ |
1809820505627164672 |