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Sudden Stratospheric Warmings as Catastrophes
Journal of the Atmospheric Sciences, 1985The sudden stratospheric warming (SSW) process is qualitatively studied using a conceptual and numerical approach guided by catastrophe theory. A simple example of a catastrophe taken from nonlinear dynamics is given, and results from previous modelling studies of SSW are interpreted in light of catastrophe theory.
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Numerical Simulation of Sudden Stratospheric Warmings
Journal of the Atmospheric Sciences, 1980Abstract A mechanistic, quasi-geostrophic, semi-spectral model with a self-consistent calculation of the mean zonal flow fields is used to numerically simulate sudden stratospheric warmings generated by a single zonal harmonic (m) planetary wave.
Mark R. Schoeberl, Darrell F. Strobel
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The Study of Sudden Stratospheric Warmings Using Infrasound
The Journal of the Acoustical Society of America, 2017Infrasound has a long history in monitoring SSWs. Several pioneering studies have focused on the various effects of a major warming on the propagation of infrasound, described throughout this chapter. A clear transition can be denoted from observing anomalous signatures towards the use of these signals to study anomalies in upper atmospheric ...
Pieter Smets, Jelle Assink, Läslo Evers
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Long-term prediction of Sudden Stratospheric Warmings
2022<p>Polar vortex is a system of strong westerly winds which forms each winter in the polar stratosphere. Sometimes, roughly every other winter, the polar vortex in the Northern Hemisphere experiences a dramatic breakdown after associated warming of the polar stratosphere. Such events are called Sudden Stratospheric Warmings (SSWs).
Mikhail Vokhmianin +3 more
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Final Sudden Stratospheric Warmings and the memory of the stratosphere
2021<p>Sudden Stratospheric Warming (SSW) is the most spectacular dynamic event occurring in the middle atmosphere. It can lead to a warming of the winter polar stratosphere by a few tens of K in one to two weeks and a reversal of the stratospheric circulation from wintertime prevailing westerly winds to easterly winds similar to summer ...
Alain Hauchecorne +2 more
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The Dynamics of Sudden Stratospheric Warmings
Annual Review of Earth and Planetary Sciences, 1980The normal global-scale circulation of the stratosphere is dominated by a zonally (longitudinally) symmetric mean flow that is westerly (from the west) in the winter hemisphere and easterly (from the east) in the summer hemisphere. Superposed on this zonal mean flow are longitudinally varying wave perturbations referred to as planetary waves.
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Ozone During Sudden Stratospheric Warming : A Three-Dimensional Simulation
1985Sudden warmings which are currently observed in the winter stratosphere are believed to be due to the upward propagation of planetary waves originating in the troposphere. Major warmings are characterized by local increases of the temperature in a deep layer beyond the stratopause with values of the order of 50 K at 10 mbar appearing over a short ...
Rose, K. +1 more
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Sudden Stratospheric Warming and Anomalous U.S. Weather
Monthly Weather Review, 1988Abstract Severe distortion of tropospheric circulation is associated with major sudden stratospheric warming (SSW) events. This distortion consisting primarily of weakening of smaller-scale synoptic mats and development of strong blocking activity, is reviewed in the context of associated weather anomalies over the United States.
James P. McGuirk, Donald A. Douglas
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On future changes in stratospheric sudden warmings
2013Traditionally, stratospheric sudden warming events (SSWs) are defined using a fixed threshold criterion. This criterion, however, may lead to spurious results if the climate of the underlying dataset is changing. In an attempt to overcome this potential shortcoming we develop alternative criteria to define such events and test these criteria using ...
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