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| Titel |
High resolution observations of turbulence in the troposphere and lower stratosphere over Gadanki |
| VerfasserIn |
G. Dutta, M. C. Ajay Kumar, P. Vinay Kumar, P. V. Rao, B. Bapiraju, H. Aleem Basha |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 27, no. 6 ; Nr. 27, no. 6 (2009-06-11), S.2407-2415 |
| Datensatznummer |
250016554
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| Publikation (Nr.) |
 copernicus.org/angeo-27-2407-2009.pdf |
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| Zusammenfassung |
| High resolution (150 m) wind measurements from 13–17
July 2004 by Mesosphere-Stratosphere-Troposphere (MST) radar and 15–16
July 2004 by Lower Atmospheric Wind Profiler (LAWP) have been used to study
the time variation of turbulence intensity. Layers of higher turbulence are
observed in the lower stratosphere on 15–16 July which give rise to mixing
in the region. Enhancement in short-period gravity wave activity and
turbulent layers are observed after 22:00 LT which could be due to a dry
convection event that occurred at that time. The breakdown of the
convectively generated high frequency waves seems to have given rise to the
turbulence layers. Wind shear is found to be high above the easterly jet,
but very poor correlation is observed between square of wind shear and
turbulence parameters in the region. The heights of the turbulent layers in
the lower stratosphere do not correlate with levels of minimum Richardson
number. A monochromatic inertia gravity wave could be identified during
13–17 July 2004. A non-linear interaction between the waves of different
scales as proposed by Hines (1992) might also be responsible for the
breakdown and generation of turbulence layers. |
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