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Coherent structures contribution to fluxes of momentum and heat during stable conditions for pre monsoon thunderstorm season
Stockholm University, Faculty of Science, Department of Meteorology .
2014 (English)In: Agricultural and Forest Meteorology, ISSN 0168-1923, E-ISSN 1873-2240, Vol. 186, 43-47 p.Article in journal (Refereed) Published
Abstract [en]

The contributions of Coherent Structures (CS) to fluxes of momentum and heat have been analyzed for night time stable conditions during pre-monsoon thunderstorm periods over two tropical stations: Kharagpur and Ranchi. Fast response data recorded using sonic anemometers have been used for 2007, 2009 and 2010 for Kharagpur and 2008-2010 for Ranchi. The signals were decomposed in several time scales and then used for zero-crossing method using discrete wavelet transform. Significant contributions by CS have been found for both momentum and heat flux at both the sites and these contributions during night time stable conditions differs for days with a thunderstorm activity from a clear day with no activity, even though at both sites thunderstorm events are occurring during daytime unstable conditions.

Place, publisher, year, edition, pages
2014. Vol. 186, 43-47 p.
Keyword [en]
Coherent structures, Momentum and heat flux, Zero crossing
National Category
Meteorology and Atmospheric Sciences
URN: urn:nbn:se:su:diva-102066DOI: 10.1016/j.agrformet.2013.11.011ISI: 000331481400005OAI: diva2:708733


Available from: 2014-03-28 Created: 2014-03-26 Last updated: 2014-03-28Bibliographically approved

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Tyagi, Bhishma
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