Vertical Helicity Flux as an Index of General Atmospheric Circulation
- Authors: Kurgansky M.V.1,2, Maksimenkov L.O.1, Khapaev A.A.1, Chkhetiani O.G.1,3
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Affiliations:
- Obukhov Institute of Atmospheric Physics
- Faculty of Physics
- Space Research Institute
- Issue: Vol 479, No 2 (2018)
- Pages: 477-481
- Section: Geophysics
- URL: https://journals.rcsi.science/1028-334X/article/view/192801
- DOI: https://doi.org/10.1134/S1028334X18040037
- ID: 192801
Cite item
Abstract
As an index of the general atmospheric circulation over the hemisphere, it is proposed to calculate the hemisphere-area-averaged (poleward of the latitude 20°) product of the Coriolis parameter by the wind velocity squared at the upper boundary of the planetary boundary layer. In practical calculations, data on the wind velocity at an isobaric level of 850 hPa were used. Control calculations for the 900 hPa level gave similar results. It is shown that the index introduced adequately characterizes the seasonal and interannual variability of the general atmospheric circulation over both hemispheres.
About the authors
M. V. Kurgansky
Obukhov Institute of Atmospheric Physics; Faculty of Physics
Author for correspondence.
Email: kurgansk@ifaran.ru
Russian Federation, Moscow, 119017; Moscow, 119991
L. O. Maksimenkov
Obukhov Institute of Atmospheric Physics
Email: kurgansk@ifaran.ru
Russian Federation, Moscow, 119017
A. A. Khapaev
Obukhov Institute of Atmospheric Physics
Email: kurgansk@ifaran.ru
Russian Federation, Moscow, 119017
O. G. Chkhetiani
Obukhov Institute of Atmospheric Physics; Space Research Institute
Email: kurgansk@ifaran.ru
Russian Federation, Moscow, 119017; Moscow, 117997