Modeling Residual Meridional Circulation at Different Phases of the Quasi-Biennial Oscillation

Koval, A. V.; Гаврилов, Н. М.; Pogoreltsev, Alexander; Efimov, Matvey M.

doi:10.1134/s0001433822010054

Cited by 1 publication

(2 citation statements)

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“…These data were also confirmed recently using numerical simulations [27]. PWs spread disturbances from the QBO into high latitudes and the upper atmosphere, including the thermosphere, while propagating in different ways along modified waveguides [28].…”

Section: Introductionsupporting

confidence: 73%

“…Their scattering diagram is subdivided into 4 patterns, which can be interpreted as the QBO phases. This approach was described in [28]. Employment of the EOFs provides the ability to take into account the spacio-temporal evolution of QBO in order to minimize possible uncertainties in the determination of the QBO phases caused usually by choosing the altitude of the zonal wind observation.…”

Section: Merra-2mentioning

confidence: 99%

See 1 more Smart Citation

Influence of Natural Tropical Oscillations on Ozone Content and Meridional Circulation in the Boreal Winter Stratosphere

Ermakova,

Koval,

Didenko

et al. 2024

Atmosphere

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The dependence of ozone content in the polar stratosphere upon different phases of the quasi-biennial oscillation (QBO) of the zonal wind and the El Niño–Southern Oscillation (ENSO) during winter was studied. The monthly (from November to January) mean residual meridional circulation (RMC) was calculated for four different combinations of the main phases of ENSO and QBO using MERRA2 reanalysis data. It has been demonstrated that the QBO phase manifests itself in different vertical distributions of ozone in the equatorial stratosphere, as well as in strengthening/weakening of the secondary meridional circulation in the tropics. The enhancement of the RMC from the tropical to the polar stratosphere is stronger at altitudes where ozone is higher in the tropics under El Niño conditions. The RMC modification and intensification are observed from ozone-depleted areas under La Niña conditions. A “cumulative” effect is observed by February under La Niña conditions and the easterly QBO, which is expressed in the lowest ozone content in the polar stratosphere. The numerical experiments carried out using the Middle and Upper Atmosphere Model (MUAM) confirmed tendencies in changes in the meridional transport detected from the reanalysis data for different combinations of QBO and ENSO.

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Section: Introductionsupporting

confidence: 73%

Section: Merra-2mentioning

confidence: 99%