Semidiurnal Tidal Wind Oscillation at Marcus IslandSource: Monthly Weather Review:;1984:;volume( 112 ):;issue: 004::page 755Author:Mori, Yukihiro
DOI: 10.1175/1520-0493(1984)112<0755:STWOAM>2.0.CO;2Publisher: American Meteorological Society
Abstract: The daily variation of the surface wind at Marcus Island (24°N, 154°E) in the subtropical Pacific area has been investigated with respect to the semidiurnal atmospheric tide. The semidiurnal oscillations of scalar wind speed and vector components of wind have been analyzed harmonically. The phase of the zonal wind component in local time agrees with the observed values at Bermuda and in the Atlantic trades. Using the Ekman model the semidiurnal tidal wind oscillation in the planetary boundary layer has been investigated, and an analytic solution has been obtained. In order to fit the theoretical tidal wind oscillation to the observed one, the eddy viscosity K should be smaller than 0.1 m2 s?1. This value of K appears smaller than the representative value in the trades. This suggests the limitation of the simple model.
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| contributor author | Mori, Yukihiro | |
| date accessioned | 2017-06-09T16:04:46Z | |
| date available | 2017-06-09T16:04:46Z | |
| date copyright | 1984/04/01 | |
| date issued | 1984 | |
| identifier issn | 0027-0644 | |
| identifier other | ams-60425.pdf | |
| identifier uri | http://onlinelibrary.yabesh.ir/handle/yetl/4201094 | |
| description abstract | The daily variation of the surface wind at Marcus Island (24°N, 154°E) in the subtropical Pacific area has been investigated with respect to the semidiurnal atmospheric tide. The semidiurnal oscillations of scalar wind speed and vector components of wind have been analyzed harmonically. The phase of the zonal wind component in local time agrees with the observed values at Bermuda and in the Atlantic trades. Using the Ekman model the semidiurnal tidal wind oscillation in the planetary boundary layer has been investigated, and an analytic solution has been obtained. In order to fit the theoretical tidal wind oscillation to the observed one, the eddy viscosity K should be smaller than 0.1 m2 s?1. This value of K appears smaller than the representative value in the trades. This suggests the limitation of the simple model. | |
| publisher | American Meteorological Society | |
| title | Semidiurnal Tidal Wind Oscillation at Marcus Island | |
| type | Journal Paper | |
| journal volume | 112 | |
| journal issue | 4 | |
| journal title | Monthly Weather Review | |
| identifier doi | 10.1175/1520-0493(1984)112<0755:STWOAM>2.0.CO;2 | |
| journal fristpage | 755 | |
| journal lastpage | 760 | |
| tree | Monthly Weather Review:;1984:;volume( 112 ):;issue: 004 | |
| contenttype | Fulltext |