A preliminary estimate of inertia effects in a bulk model of katabatic wind
Observed sastrugi orientations showed considerable deviation from a bulk theory of katabatic wind in lee sides of troughs in ice sheet undulations of which the wavelength is about 400km on the Mizuho Plateau, East Antarctica. The effect of the inertia term which may account for the deviations but is...
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Faculty of Sciences, Kochi University
1989
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ftnipr:oai:nipr.repo.nii.ac.jp:00003565 2023-05-15T13:49:00+02:00 A preliminary estimate of inertia effects in a bulk model of katabatic wind Tokio Kikuchi Yutaka Ageta 1989-08 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3565 http://id.nii.ac.jp/1291/00003565/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3565&item_no=1&attribute_id=18&file_no=1 en eng Faculty of Sciences, Kochi University Water Research Institute, Nagoya University National Institute of Polar Research https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3565 http://id.nii.ac.jp/1291/00003565/ AA10756213 Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology, 2, 61-69(1989-08) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3565&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 1989 ftnipr 2022-12-10T19:45:40Z Observed sastrugi orientations showed considerable deviation from a bulk theory of katabatic wind in lee sides of troughs in ice sheet undulations of which the wavelength is about 400km on the Mizuho Plateau, East Antarctica. The effect of the inertia term which may account for the deviations but is often neglected in the equation of motion for katabatic wind is estimated with the perturbation method. A sinusoidally undulating slope with ridges and troughs is assumed for the model calculation instead of an infinite flat slope for the inertiafree model. The calculated results, in a typical inversion, suggest that the inertia term is significant if the wavelength of the undulations is smaller than about 200km while the effect of the undulations can be neglected if the wavelength is smaller than about 50km. Observed variability in the wind direction in the lee of the troughs may be accounted for by the effect of the inversion height which enhances the inertia effect. Report Antarc* Antarctica East Antarctica Ice Sheet Polar meteorology and glaciology Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology National Institute of Polar Research Repository, Japan East Antarctica Mizuho ENVELOPE(44.317,44.317,-70.683,-70.683) Mizuho Plateau ENVELOPE(40.000,40.000,-73.000,-73.000) Sastrugi ENVELOPE(163.683,163.683,-74.617,-74.617) |
institution |
Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
description |
Observed sastrugi orientations showed considerable deviation from a bulk theory of katabatic wind in lee sides of troughs in ice sheet undulations of which the wavelength is about 400km on the Mizuho Plateau, East Antarctica. The effect of the inertia term which may account for the deviations but is often neglected in the equation of motion for katabatic wind is estimated with the perturbation method. A sinusoidally undulating slope with ridges and troughs is assumed for the model calculation instead of an infinite flat slope for the inertiafree model. The calculated results, in a typical inversion, suggest that the inertia term is significant if the wavelength of the undulations is smaller than about 200km while the effect of the undulations can be neglected if the wavelength is smaller than about 50km. Observed variability in the wind direction in the lee of the troughs may be accounted for by the effect of the inversion height which enhances the inertia effect. |
format |
Report |
author |
Tokio Kikuchi Yutaka Ageta |
spellingShingle |
Tokio Kikuchi Yutaka Ageta A preliminary estimate of inertia effects in a bulk model of katabatic wind |
author_facet |
Tokio Kikuchi Yutaka Ageta |
author_sort |
Tokio Kikuchi |
title |
A preliminary estimate of inertia effects in a bulk model of katabatic wind |
title_short |
A preliminary estimate of inertia effects in a bulk model of katabatic wind |
title_full |
A preliminary estimate of inertia effects in a bulk model of katabatic wind |
title_fullStr |
A preliminary estimate of inertia effects in a bulk model of katabatic wind |
title_full_unstemmed |
A preliminary estimate of inertia effects in a bulk model of katabatic wind |
title_sort |
preliminary estimate of inertia effects in a bulk model of katabatic wind |
publisher |
Faculty of Sciences, Kochi University |
publishDate |
1989 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3565 http://id.nii.ac.jp/1291/00003565/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3565&item_no=1&attribute_id=18&file_no=1 |
long_lat |
ENVELOPE(44.317,44.317,-70.683,-70.683) ENVELOPE(40.000,40.000,-73.000,-73.000) ENVELOPE(163.683,163.683,-74.617,-74.617) |
geographic |
East Antarctica Mizuho Mizuho Plateau Sastrugi |
geographic_facet |
East Antarctica Mizuho Mizuho Plateau Sastrugi |
genre |
Antarc* Antarctica East Antarctica Ice Sheet Polar meteorology and glaciology Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology |
genre_facet |
Antarc* Antarctica East Antarctica Ice Sheet Polar meteorology and glaciology Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3565 http://id.nii.ac.jp/1291/00003565/ AA10756213 Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology, 2, 61-69(1989-08) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3565&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766250409350922240 |