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| Titel |
On the helicity estimation in the atmospheric boundary layer |
| VerfasserIn |
Natalia Victorovna Vazaeva, Valeriy Feodosevich Kramar, Rostislav Dmitrievich Kouznetsov, Vasily Sergeevich Lyulyukin, Otto Guramovich Chkhetiani |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250102802
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| Publikation (Nr.) |
 EGU/EGU2015-2203.pdf |
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| Zusammenfassung |
| Large-scale motions in the atmospheric boundary layer (ABL) are sustained by the
cooperative effect of friction and Earth rotation. This flows have a non-zero helicityÂ[1,2].
Consequently, turbulence in the ABL is also characterize by the non-zero helicityÂ[3]. This
property has been observed in the atmospheric experimentsÂ[4] and the DNS modelingÂ[5].
The role of helicity in the atmospheric and ocean large-scale dynamics and its possible
prognostics sense attracts permanent interest.
The purpose of the present investigation is to determine the helicity in terms of
experimental data and to check the possibility of the ABL helicity estimation. The integral
helicity in the Ekman layer is given by
0 /« ∞ HÂ=ÂUG2Â+ÂVG2Â[1],
PIC |
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