Observation of an atmospheric boundary layer at Mizuho Station using an acoustic sounder

Acoustic sounding was used in observing a katabatic wind layer at the lowest few hundred meters over Mizuho Station (70°42′S, 44°20′E, 2230m above sea level), East Antarctica. Some examples of acoustic echo return showed the structure of surface inversions in connection with a katabatic wind and the...

Full description

Bibliographic Details
Main Authors: Shun'ichi Kobayashi, Nobuyoshi Ishikawa, Tetsuo Ohata, Sadao Kawaguchi
Format: Report
Language:English
Published: The Institute of Low Temperature Science, Hokkaido University 1983
Subjects:
East Antarctica
Mizuho
Mizuho Station
Antarc*
Antarctica
Memoirs of National Institute of Polar Research
Polar Research
Online Access:https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1497
http://id.nii.ac.jp/1291/00001497/
https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1497&item_no=1&attribute_id=18&file_no=1
Description
Summary:Acoustic sounding was used in observing a katabatic wind layer at the lowest few hundred meters over Mizuho Station (70°42′S, 44°20′E, 2230m above sea level), East Antarctica. Some examples of acoustic echo return showed the structure of surface inversions in connection with a katabatic wind and the behavior of breaking waves, e.g.a "herringbone" type structure described by EMMANUEL et al. (J. Atmos. Sci., 29,886,1972) as an unstable wave. Observations disclosed that wave-like motion exists in a layer between the heights of 100 and 300m and it has a shorter period than the calculated value from the Brunt-Vaisala frequency. This discrepancy was explained by a simple two-dimensional wave equation, considering the presence of mean atmospheric flow.

Similar Items