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dc.contributor.author | Horiguchi, Mitsuaki | en |
dc.contributor.author | Hayashi, Taiichi | en |
dc.contributor.author | Hashiguchi, Hiroyuki | en |
dc.contributor.author | Ito, Yoshiki | en |
dc.contributor.author | Ueda, Hiromasa | en |
dc.contributor.alternative | 堀口, 光章 | ja |
dc.date.accessioned | 2010-10-04T04:21:28Z | - |
dc.date.available | 2010-10-04T04:21:28Z | - |
dc.date.issued | 2010-07 | - |
dc.identifier.issn | 0006-8314 | - |
dc.identifier.uri | http://hdl.handle.net/2433/126690 | - |
dc.description.abstract | Turbulence structures of high Reynolds number flow in the near-neutral atmospheric boundary layer (ABL) are investigated based on observations at Shionomisaki and Shigaraki, Japan. A Doppler sodar measured the vertical profiles of winds in the ABL. Using the integral wavelet transform for the time series of surface wind data, the pattern of a descending high-speed structure with large vertical extent (from the surface to more than 200-m level) is depicted from the Doppler sodar data. Essentially this structure is a specific type of coherent structure that has been previously shown in experiments on turbulent boundary-layer flows. Large-scale high-speed structures in the ABL are extracted using a long time scale (240 s) for the wavelet transform. The non-dimensional interval of time between structures is evaluated as 3.0–6.2 in most cases. These structures make a large contribution to downward momentum transfer in the surface layer. Quadrant analyses of the turbulent motion measured by the sonic anemometer (20-m height) suggest that the sweep motion (high-speed downward motion) plays a substantial role in the downward momentum transfer. In general, the contribution of sweep motions to the momentum flux is nearly equal to that of ejection motions (low-speed upward motions). This contribution of sweep motions is related to the large-scale high-speed structures. | en |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | - |
dc.publisher | Springer Science+Business Media B.V. | en |
dc.rights | The original publication is available at www.springerlink.com | en |
dc.rights | This is not the published version. Please cite only the published version. | en |
dc.rights | この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 | ja |
dc.subject | Atmospheric boundary layer | en |
dc.subject | Coherent structures | en |
dc.subject | Doppler sodar | en |
dc.subject | Ejections and sweeps | en |
dc.subject | Momentum transfer | en |
dc.subject | Wavelet transform | en |
dc.title | Observations of Coherent Turbulence Structures in the Near-Neutral Atmospheric Boundary Layer | en |
dc.type | journal article | - |
dc.type.niitype | Journal Article | - |
dc.identifier.ncid | AA00573126 | - |
dc.identifier.jtitle | Boundary-Layer Meteorology | en |
dc.identifier.volume | 136 | - |
dc.identifier.issue | 1 | - |
dc.identifier.spage | 25 | - |
dc.identifier.epage | 44 | - |
dc.relation.doi | 10.1007/s10546-010-9500-5 | - |
dc.textversion | author | - |
dcterms.accessRights | open access | - |
出現コレクション: | 学術雑誌掲載論文等 |
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