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RISThe Modeled Latitudinal Distribution of the Ozone Quasi-Biennial Oscillation Using Observed Equatorial Winds
Publisher: American Meteorological Society
Abstract: A simulation of precise years of the quasi-biennial oscillation (QBO) is achieved in a two-dimensional model by relaxing the modeled equatorial winds in the lower stratosphere toward radiosonde observations. The model has ...
The Role of the Seasonal Cycle in the Quasi-biennial Oscillation Of Ozone
Publisher: American Meteorological Society
Abstract: Satellite and station data have shown that the quasi-biennial oscillation (QBO) in total column ozone is asymmetric about the equator, unlike the zonal wind oscillation. There is an asymmetry in phase, as subtropical ozone ...
The 11-Yr Solar Cycle in ERA-40 Data: An Update to 2008
Publisher: American Meteorological Society
Abstract: Multiple linear regression is used to diagnose the signal of the 11-yr solar cycle in zonal-mean zonal wind and temperature in the 40-yr ECMWF Re-Analysis (ERA-40) dataset. The results of previous studies are extended to ...
The Influence of the QBO on the Propagation of Equatorial Waves into the Stratosphere
Publisher: American Meteorological Society
Abstract: he variation of stratospheric equatorial wave characteristics with the phase of the quasi-biennial oscillation (QBO) is investigated using ECMWF Re-Analysis and NOAA outgoing longwave radiation (OLR) data. The impact of ...
How Does the Quasi-Biennial Oscillation Affect the Stratospheric Polar Vortex?
Publisher: American Meteorological Society
Abstract: he 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 not well understood. The composite ...
Characterization of the 11-Year Solar Signal Using a Multiple Regression Analysis of the ERA-40 Dataset
Publisher: American Meteorological Society
Abstract: A multiple linear regression analysis of the ERA-40 dataset for the period 1979?2001 has been used to study the influence of the 11-yr solar cycle on atmospheric temperature and zonal winds. Volcanic, North Atlantic ...
Evidence for the Influence of the Quasi-Biennial Oscillation on the Semiannual Oscillation in the Tropical Middle Atmosphere
Publisher: American Meteorological Society
Characterizing the Variability and Extremes of the Stratospheric Polar Vortices Using 2D Moment Analysis
Publisher: American Meteorological Society
Abstract: he mean state, variability, and extreme variability of the stratospheric polar vortices, with an emphasis on the Northern Hemisphere (NH) vortex, are examined using two-dimensional moment analysis and extreme value theory ...
A Possible Influence of Equatorial Winds on the September 2002 Southern Hemisphere Sudden Warming Event
Publisher: American Meteorological Society
Abstract: The stratospheric sudden warming in the Southern Hemisphere (SH) in September 2002 was unexpected for two reasons. First, planetary wave activity in the Southern Hemisphere is very weak, and midwinter warmings have never ...
Stratospheric Response to the 11-Yr Solar Cycle: Breaking Planetary Waves, Internal Reflection, and Resonance
Publisher: American Meteorological Society
Abstract: AbstractBreaking planetary waves (BPWs) affect stratospheric dynamics by reshaping the waveguides, causing internal wave reflection, and preconditioning sudden stratospheric warmings. This study examines observed changes ...