The quasi‐biennial oscillation

  title={The quasi‐biennial oscillation},
  author={Mark P. Baldwin and Laura J. Gray and Timothy J. Dunkerton and Kevin Hamilton and Peter H. Haynes and William J. Randel and James R. Holton and Michael J. Alexander and Isamu Hirota and Takeshi Horinouchi and Dylan B. A. Jones and Jonathan S. Kinnersley and Carlos Marquardt and Kaoru Sato and Masaaki Takahashi},
  journal={Reviews of Geophysics},
  pages={179 - 229}
The quasi‐biennial oscillation (QBO) dominates the variability of the equatorial stratosphere (∼16–50 km) and is easily seen as downward propagating easterly and westerly wind regimes, with a variable period averaging approximately 28 months. From a fluid dynamical perspective, the QBO is a fascinating example of a coherent, oscillating mean flow that is driven by propagating waves with periods unrelated to that of the resulting oscillation. Although the QBO is a tropical phenomenon, it affects… 
The quasi-biennial oscillation: representation in numerical models and effects on stratospheric transport and trace gases
The quasi-biennial oscillation (QBO) of zonal wind is a prominent mode of variability in the tropical stratosphere. By a Coriolis effect on the winds it affects not only the meridional circulation
How does the quasi-biennial oscillation affect the stratospheric polar vortex?
AbstractThe stratospheric polar vortex is weaker in the easterly phase of the quasi-biennial oscillation (QBO-E) than in the westerly phase (QBO-W), but the mechanism behind the QBO's influence is
High‐latitude influence of the quasi‐biennial oscillation
The interannual variability of the stratospheric winter polar vortex is correlated with the phase of the quasi‐biennial oscillation (QBO) of tropical stratospheric winds. This dynamical coupling
Forcing of the quasi-biennial oscillation from a broad spectrum of atmospheric waves
The circulation of the stratosphere, and its influence on the trace constituent distribution, is an important component of the climate system, which must be included in simulations of global climate
Wave-mean flow interactions driving the quasi-biennial oscillation in ECHAM6
This thesis investigates the dynamics of the quasi-biennial oscillation of the tropical stratosphere (QBO). For this purpose, the general circulation model ECHAM6 and the Max Planck Institute Earth
Revisiting the Quasi-Biennial Oscillation as Seen in ERA5. Part I: Description and Momentum Budget
The dynamics and momentum budget of the quasi-biennial oscillation (QBO) are examined in the ERA5 reanalysis and compared with those in ERA-I. Because of ERA5's higher spatial resolution it is
Climatology and Forcing of the Quasi-Biennial Oscillation in the MAECHAM5 Model
The quasi-biennial oscillation (QBO) in the equatorial zonal wind is an outstanding phenomenon of the atmosphere. The QBO is driven by a broad spectrum of waves excited in the tropical troposphere
Extratropical signature of the quasi‐biennial oscillation
Using the assimilated data from the National Centers for Environmental Prediction (NCEP) reanalysis, we show that the extratropical signature of the tropical quasi-biennial oscillation (QBO) is seen
The Continuous Mutual Evolution of Equatorial Waves and the Quasi-Biennial Oscillation of Zonal Flow in the Equatorial Stratosphere
AbstractThe continuous mutual evolution of equatorial waves and the background quasi-biennial oscillation (QBO) is demonstrated using daily NCEP–U.S. Department of Energy (DOE) reanalysis for the


Coupling of the Quasi-biennial Oscillation and the Extratropical Circulation in the Stratosphere through Planetary Wave Transport
Abstract A significant fraction of the interannual variability of the wintertime stratosphere in the Northern Hemisphere is related to the quasi-biennial oscillation (QBO) in tropical winds.
Equatorial waves in a general circulation model simulating a quasi-biennial-oscillation
The quasi-biennial oscillation (QBO) in the equatorial lower stratosphere has been well simulated in the first version of the Center for Climate System Research / National Institute for Environmental
Modeling quasi-biennial variability in the semiannual double peak
The interannual variability of the stratopause semiannual double peak as seen in methane measurements made by the Halogen Occultation Experiment (HALOE) is investigated using a two-dimensional
Exploring the effects of forcing quasi‐biennial oscillations in a two‐dimensional model
Analytic forcing of the stratospheric quasi-biennial oscillation (QBO) is introduced into a two-dimensional middle atmosphere model containing interactive radiation, dynamics, photochemistry and
Effects of the quasi‐biennial oscillation on the zonally averaged transport of tracers
The influence of the quasi-biennial oscillation (QBO) on the transport of long-lived tracers out of the tropics and the mechanism responsible for the QBO in subtropical ozone and its dependence on
Influence of the Annual Cycle in Meridional Transport on the Quasi-biennial Oscillation in Total Ozone
Abstract The equatorial stratospheric quasi-biennial oscillation (QBO) in zonal wind and temperature is observed to be symmetric about the equator. The QBO in column ozone, although it is believed to
Kelvin wave activity and the quasi-biennial oscillation in the equatorial lower stratosphere
This note presents observational results and their mechanistic understanding of the long:-term vari­ ation of Kelvin wave activity in the equatorial lower stratosphere. Analyses are made for 15 years
Effects of an imposed quasi-biennial oscillation in a comprehensive troposphere-stratosphere-mesosphere general circulation model
A 48-yr integration was performed using the Geophysical Fluid Dynamics Laboratory SKYHI troposphere‐ stratosphere‐mesosphere GCM with an imposed zonal momentum forcing designed to produce a
Is there a quasi‐biennial oscillation in tropical deep convection?
We investigate the possibility that the stratospheric Quasi‐Biennial Oscillation (QBO) modulates deep convection in the tropics. Interannual variations of outgoing longwave radiation (OLR) in the
Modeling the Quasi-biennial Oscillation's Effect on the Winter Stratospheric Circulation
Abstract The influence of the equatorial quasi-biennial oscillation (QBO) on the winter middle atmosphere is modeled with a mechanistic global primitive equation model. The model's polar vortex