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Doklady Earth Sciences

, Volume 479, Issue 2, pp 477–481 | Cite as

Vertical Helicity Flux as an Index of General Atmospheric Circulation

  • M. V. Kurgansky
  • L. O. Maksimenkov
  • A. A. Khapaev
  • O. G. Chkhetiani
Geophysics
  • 15 Downloads

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.

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Copyright information

© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  • M. V. Kurgansky
    • 1
    • 2
  • L. O. Maksimenkov
    • 1
  • A. A. Khapaev
    • 1
  • O. G. Chkhetiani
    • 1
    • 3
  1. 1.Obukhov Institute of Atmospheric PhysicsRussian Academy of SciencesMoscowRussia
  2. 2.Faculty of PhysicsMoscow State UniversityMoscowRussia
  3. 3.Space Research InstituteRussian Academy of SciencesMoscowRussia

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