Results 191 to 200 of about 8,237 (222)

A research on the Stratosphereic Sudden Warming

Proceedings of 2011 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference, 2011
In this dissertation, we described the basic measure of detecting atmosphere—the basic component of Radiosonde and it's principle. With the definition of the Stratospheric Sudden Warming (SSW) and the measure of ascertaining the event of the Stratospheric Sudden Warming, my research are mainly focused on finding the case of SSW phenomenon from the ...
null Wei Li, null Haoge Ma, null Zhiwei Cai   +2 more
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The Dynamics of Sudden Stratospheric Warmings

Annual Review of Earth and Planetary Sciences, 1980
The 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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Simulated sudden stratospheric warming; synoptic evolution

Quarterly Journal of the Royal Meteorological Society, 1987
AbstractAn analysis is presented of a sudden stratospheric warming event which occurred spontaneously during a general circulation model simulation of the global atmospheric circulation. Two separate warming pulses exhibit the same dynamical evolution with a ‘cycle’ of about two weeks.
W. T. Blackshear, W. L. Grose, R. E. Turner   +2 more
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The Study of Sudden Stratospheric Warmings Using Infrasound

The Journal of the Acoustical Society of America, 2017
Infrasound 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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Sudden Stratospheric Warmings as Catastrophes

Journal of the Atmospheric Sciences, 1985
The 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, 1980
Abstract 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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On future changes in stratospheric sudden warmings

2013
Traditionally, 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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A Dynamical Model of the Stratospheric Sudden Warming

Journal of the Atmospheric Sciences, 1971
Abstract The dynamics of the stratosphere sudden warming phenomenon is discussed in terms of the interaction of vertically propagating planetary waves with zonal winds. If global-scale disturbances are generated in the troposphere, they propagate upward into the stratosphere, where the waves act to decelerate the polar night jet through the induction ...
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Gravity Wave Weakening During the 2019 Antarctic Stratospheric Sudden Warming

Geophysical Research Letters, 2021
Masaru Kogure, Jia Yue, Huixin
exaly  

Ionospheric signatures of sudden stratospheric warming: Ion temperature at middle latitude

Geophysical Research Letters, 2008
L P Goncharenko, S-R Zhang
exaly