A re-evaluation of surface layer turbulence from Antarctic data
A data set of velocity and temperature variances measured in the surface layer over a glacier in Antarctica is analysed in terms of the Monin-Obukhov Similarity Theory. The presence of surface inhomogeneities, flow unsteadiness, and other uncontrolled disturbances affects the shape of the distributi...
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Societa italiana di fisica
2008
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ftcnrroma:oai:eprints.bice.rm.cnr.it:16409 2023-05-15T14:00:11+02:00 A re-evaluation of surface layer turbulence from Antarctic data Tampieri, F. Maurizi, A. 2008 text http://eprints.bice.rm.cnr.it/16409/ http://eprints.bice.rm.cnr.it/16409/1/ncc9337.pdf https://www.sif.it/riviste/sif/ncc/econtents/2008/031/05-06/article/12 en eng Societa italiana di fisica http://eprints.bice.rm.cnr.it/16409/1/ncc9337.pdf Tampieri, F. and Maurizi, A. (2008) A re-evaluation of surface layer turbulence from Antarctic data. Il nuovo cimento C, 31 (5\6). pp. 711-722. ISSN 1826-9885 551.6 Climatologia e tempo atmosferico (Classificare qui i lo studio dei Cambiamenti climatici) Article PeerReviewed 2008 ftcnrroma 2022-02-24T22:10:20Z A data set of velocity and temperature variances measured in the surface layer over a glacier in Antarctica is analysed in terms of the Monin-Obukhov Similarity Theory. The presence of surface inhomogeneities, flow unsteadiness, and other uncontrolled disturbances affects the shape of the distribution of normalised variances for intervals of the stability parameter. The modal value of the distribution, instead of the mean, is used to estimate the numerical coefficients of the similarity functions to minimize the influence of the (positive) outliers on the estimates. The overall agreement of the present results with previuos investigations is good, and also the spread of the numerical values noted by different authors is confirmed. In particular the investigation points out the need to use a similarity function for the temperature variance which diverges in near neutral conditions, as the heat flux goes to zero, and the occurrence of a large stability region where the variances of velocity and temperature are characterised by a behaviour almost independent of the momentum flux. Article in Journal/Newspaper Antarc* Antarctic Antarctica CNR Solar (Scientific Open-access Literature Archive and Repository - National Research Council) Antarctic |
institution |
Open Polar |
collection |
CNR Solar (Scientific Open-access Literature Archive and Repository - National Research Council) |
op_collection_id |
ftcnrroma |
language |
English |
topic |
551.6 Climatologia e tempo atmosferico (Classificare qui i lo studio dei Cambiamenti climatici) |
spellingShingle |
551.6 Climatologia e tempo atmosferico (Classificare qui i lo studio dei Cambiamenti climatici) Tampieri, F. Maurizi, A. A re-evaluation of surface layer turbulence from Antarctic data |
topic_facet |
551.6 Climatologia e tempo atmosferico (Classificare qui i lo studio dei Cambiamenti climatici) |
description |
A data set of velocity and temperature variances measured in the surface layer over a glacier in Antarctica is analysed in terms of the Monin-Obukhov Similarity Theory. The presence of surface inhomogeneities, flow unsteadiness, and other uncontrolled disturbances affects the shape of the distribution of normalised variances for intervals of the stability parameter. The modal value of the distribution, instead of the mean, is used to estimate the numerical coefficients of the similarity functions to minimize the influence of the (positive) outliers on the estimates. The overall agreement of the present results with previuos investigations is good, and also the spread of the numerical values noted by different authors is confirmed. In particular the investigation points out the need to use a similarity function for the temperature variance which diverges in near neutral conditions, as the heat flux goes to zero, and the occurrence of a large stability region where the variances of velocity and temperature are characterised by a behaviour almost independent of the momentum flux. |
format |
Article in Journal/Newspaper |
author |
Tampieri, F. Maurizi, A. |
author_facet |
Tampieri, F. Maurizi, A. |
author_sort |
Tampieri, F. |
title |
A re-evaluation of surface layer turbulence from Antarctic data |
title_short |
A re-evaluation of surface layer turbulence from Antarctic data |
title_full |
A re-evaluation of surface layer turbulence from Antarctic data |
title_fullStr |
A re-evaluation of surface layer turbulence from Antarctic data |
title_full_unstemmed |
A re-evaluation of surface layer turbulence from Antarctic data |
title_sort |
re-evaluation of surface layer turbulence from antarctic data |
publisher |
Societa italiana di fisica |
publishDate |
2008 |
url |
http://eprints.bice.rm.cnr.it/16409/ http://eprints.bice.rm.cnr.it/16409/1/ncc9337.pdf https://www.sif.it/riviste/sif/ncc/econtents/2008/031/05-06/article/12 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_relation |
http://eprints.bice.rm.cnr.it/16409/1/ncc9337.pdf Tampieri, F. and Maurizi, A. (2008) A re-evaluation of surface layer turbulence from Antarctic data. Il nuovo cimento C, 31 (5\6). pp. 711-722. ISSN 1826-9885 |
_version_ |
1766269195335499776 |