Results 171 to 180 of about 9,534 (213)

The quasi-biennial oscillation [PDF]

open access: yesReviews of Geophysics, 2001
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 ...
Lesley J Gray   +2 more
exaly   +3 more sources

Reconstructing the quasi‐biennial oscillation back to the early 1900s [PDF]

open access: yesGeophysical Research Letters, 2007
The quasi‐biennial oscillation (QBO) is important for understanding the dynamical and chemical variability of the global stratosphere. Currently available wind data from the equatorial stratosphere extend back to 1953. Here we present reconstructions of the QBO extending back to 1900 that can be used to constrain climate model simulations.
Stefan Bronnimann, P D Jones
exaly   +3 more sources
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A Theory of the Quasi-Biennial Oscillation

Journal of the Atmospheric Sciences, 1968
Abstract A theory is presented which indicates that the quasi-biennial oscillation of the zonal wind in the tropical stratosphere is a result of the interaction of long-period, vertically propagating gravity waves with the zonal wind. We discuss the theoretical basis and observational evidence for the existence of long-period gravity waves near the ...
Richard S. Lindzen, James R. Holton
openaire   +1 more source

Seasonal Prediction of the Quasi‐Biennial Oscillation

Journal of Geophysical Research: Atmospheres, 2022
AbstractThe ability to forecast the Quasi‐Biennial Oscillation (QBO) was examined using Version 2 of NASA's Global Earth Observing System Subseasonal‐to‐Seasonal (GEOS‐S2S) forecasting system. The vertical and time structure of the QBO was characterized by the principal components of the first two empirical orthogonal functions (EOFs). A set of 9‐month
L. Coy   +5 more
openaire   +1 more source

The influence of the quasi-biennial oscillation on the Madden–Julian oscillation

Nature Reviews Earth & Environment, 2021
The stratospheric quasi-biennial oscillation (QBO) and the tropospheric Madden–Julian oscillation (MJO) are strongly linked in boreal winter. In this Review, we synthesize observational and modelling evidence for this QBO–MJO connection and discuss its effects on MJO teleconnections and subseasonal-to-seasonal predictions.
Zane Martin   +7 more
openaire   +1 more source

Simulated disruptions of the Quasi-Biennial Oscillation

2021
<p>The Quasi-Biennial Oscillation has exhibited remarkable stability over the observational record—until a well-documented 2015/16 disruption and an emerging disruption in 2020/21. The possibility that disruptions are more frequent in a changing climate is important to consider, as the QBO affects predictability ...
Kevin DallaSanta, Clara Orbe
openaire   +1 more source

The latitudinal structure of the quasi‐biennial oscillation

Quarterly Journal of the Royal Meteorological Society, 1998
AbstractThe theory of symmetric time‐dependent meridional circulations in a radiatively damped atmosphere shows that, when the frequency σ of the time variation of an applied body force is smaller than the radiative damping rate α, there are two distinct forms of response to the force. At high latitudes, the response appears primarily as a quasi‐steady
openaire   +1 more source

The Quasi-Biennial Oscillation (QBO)

1999
Clayton was the first to note that the precipitation and pressure at several stations in the United States contained an approximately two-year oscillation. His stations were located all over the country, most were from the period 1874–1883, but there were some among them going as far hack as 1839 (Clayton 1884, 1885). Clayton’s oscillation had a period
Karin G. Labitzke, Harry van Loon
openaire   +1 more source

Note on Variations in the “Quasi-Biennial” Oscillation

Monthly Weather Review, 1972
Data compiled since 1962 are examined in an effort to quantify further the observed variations in the 'quasi-biennial' oscillation (QBO). A further study of temperatures and zonal winds is conducted for Canton Island, Ascension Island, and Balboa, C.Z. Statistics are derived for the period of record prior to 1962 and for that subsequent to 1962.
RAYMOND M. McINTURFF, ALVIN J. MILLER
openaire   +1 more source

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