Statistical dynamics of equatorial waves in tropical radiosonde wind data

Weibull distributions were fitted to wind speed data from radiosonde stations in the global tropics. A statistical theory of equatorial waves was proposed to explain the shape parameter k obtained over Malay Peninsula and the wider Equatorial Monsoon Zone. The theory uses the (−5/3)-power law in qua...

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Main Authors: Djamil, Y. S., Koh, Tieh Yong, Teo, Chee Kiat
Format: Article
Language:English
Published: 2012
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Online Access:https://hdl.handle.net/10356/95556
http://hdl.handle.net/10220/8646
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Institution: Nanyang Technological University
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spelling sg-ntu-dr.10356-955562020-09-26T21:26:14Z Statistical dynamics of equatorial waves in tropical radiosonde wind data Djamil, Y. S. Koh, Tieh Yong Teo, Chee Kiat DRNTU::Science::Geology::Volcanoes and earthquakes Weibull distributions were fitted to wind speed data from radiosonde stations in the global tropics. A statistical theory of equatorial waves was proposed to explain the shape parameter k obtained over Malay Peninsula and the wider Equatorial Monsoon Zone. The theory uses the (−5/3)-power law in quasi-2-D turbulence, classical Boltzmann statistics and the Central Limit Theorem. It provides a statistical dynamical basis for using empirical Weibull fits to derive wind speed thresholds for monitoring data quality. The regionally adapted thresholds retain more useful data than conventional ones defined from taking the regional mean plus three standard deviations. The new approach is shown to eliminate reports of atypically strong wind over Malay Peninsula which may have escaped detection in quality control of global datasets as the latter has assumed a larger spread of wind speed. Published version 2012-09-27T01:29:03Z 2019-12-06T19:17:14Z 2012-09-27T01:29:03Z 2019-12-06T19:17:14Z 2010 2010 Journal Article Koh, T. Y., Djamil, Y. S., & Teo, C. K. (2010). Statistical dynamics of equatorial waves in tropical radiosonde wind data. Atmospheric Chemistry and Physics Discussions, 10(7), 16345-16384. 1680-7375 https://hdl.handle.net/10356/95556 http://hdl.handle.net/10220/8646 10.5194/acpd-10-16345-2010 en Atmospheric chemistry and physics discussions © 2010 Author(s). This paper was published in Atmospheric Chemistry and Physics Discussions and is made available as an electronic reprint (preprint) with permission of European Geosciences Union. The paper can be found at the following official URL: [http://dx.doi.org/10.5194/acpd-10-16345-2010].  One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. application/pdf
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic DRNTU::Science::Geology::Volcanoes and earthquakes
spellingShingle DRNTU::Science::Geology::Volcanoes and earthquakes
Djamil, Y. S.
Koh, Tieh Yong
Teo, Chee Kiat
Statistical dynamics of equatorial waves in tropical radiosonde wind data
description Weibull distributions were fitted to wind speed data from radiosonde stations in the global tropics. A statistical theory of equatorial waves was proposed to explain the shape parameter k obtained over Malay Peninsula and the wider Equatorial Monsoon Zone. The theory uses the (−5/3)-power law in quasi-2-D turbulence, classical Boltzmann statistics and the Central Limit Theorem. It provides a statistical dynamical basis for using empirical Weibull fits to derive wind speed thresholds for monitoring data quality. The regionally adapted thresholds retain more useful data than conventional ones defined from taking the regional mean plus three standard deviations. The new approach is shown to eliminate reports of atypically strong wind over Malay Peninsula which may have escaped detection in quality control of global datasets as the latter has assumed a larger spread of wind speed.
format Article
author Djamil, Y. S.
Koh, Tieh Yong
Teo, Chee Kiat
author_facet Djamil, Y. S.
Koh, Tieh Yong
Teo, Chee Kiat
author_sort Djamil, Y. S.
title Statistical dynamics of equatorial waves in tropical radiosonde wind data
title_short Statistical dynamics of equatorial waves in tropical radiosonde wind data
title_full Statistical dynamics of equatorial waves in tropical radiosonde wind data
title_fullStr Statistical dynamics of equatorial waves in tropical radiosonde wind data
title_full_unstemmed Statistical dynamics of equatorial waves in tropical radiosonde wind data
title_sort statistical dynamics of equatorial waves in tropical radiosonde wind data
publishDate 2012
url https://hdl.handle.net/10356/95556
http://hdl.handle.net/10220/8646
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