Results 21 to 30 of about 516,711 (190)
The Downward Influence of Stratospheric Sudden Warmings* [PDF]
Journal of the Atmospheric Sciences, 2014 Abstract The coupling between the stratosphere and the troposphere following two major stratospheric sudden warmings is studied in the Canadian Middle Atmosphere Model using a nudging technique by which the zonal-mean evolution of the reference sudden warmings are artificially induced in an ~100-member ensemble spun off from a control ...
Hitchcock, Peter, Simpson, Isla R.
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Why Are Stratospheric Sudden Warmings Sudden (and Intermittent)? [PDF]
Journal of the Atmospheric Sciences, 2020 Abstract This paper examines the role of wave–mean flow interaction in the onset and suddenness of stratospheric sudden warmings (SSWs). Evidence is presented that SSWs are, on average, a threshold behavior of finite-amplitude Rossby waves arising from the competition between an increasing wave activity A and a decreasing zonal-mean ...
Jonathan Falk +2 more
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A tropical stratopause precursor for sudden stratospheric warmings [PDF]
Scientific Reports, 2022 AbstractDramatic meteorological phenomena in the winter polar stratosphere known as Sudden Stratospheric Warming (SSW) events are well recognized for their impacts felt across the whole atmosphere. Apart from the influence of tropospheric forcing and stratospheric control, many studies have addressed the possible role of external factors on the ...
N. Koushik +2 more
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Impact of the 2009 major stratospheric sudden warming on the composition of the stratosphere [PDF]
Atmospheric Chemistry and Physics, 2015 Abstract. In a case study of a remarkable Major stratospheric sudden Warming (MW) during the boreal winter 2008/09, we investigate how transport and mixing triggered by this event affect the composition of the whole stratosphere in the Northern Hemisphere.
M. Tao +7 more
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Stratospheric wave driving events as an alternative to sudden stratospheric sudden warmings [PDF]
, 2022 Abstract. Natural variations in the strength of the northern stratospheric polar vortex, so-called polar vortex events, help to improve sub-seasonal to seasonal (S2S) predictions of winter climate. Past research on polar vortex events has been largely focused on stratospheric sudden warming events (SSWs), a class of relatively strong weakenings of the ...
Thomas Reichler, Martin Jucker
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Stratospheric predictability and sudden stratospheric warming events [PDF]
Journal of Geophysical Research: Atmospheres, 2009 A comparative study of the limit of predictability in the stratosphere and troposphere in a coupled general circulation model is carried out using the National Center for Environmental Prediction (NCEP) Climate Forecast System Interactive Ensemble (CFSIE).
Cristiana Stan, David M. Straus
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The Antarctic stratospheric sudden warming of 2002: A self-tuned resonance? [PDF]
, 2006 The extraordinary Antarctic stratospheric warming event of 2002 was characterized by a remarkable vertical structure, with the vortex observed to divide at upper levels in the stratosphere but not at lower levels: such 'partially' split vortex events are
Esler, J. G. +11 more
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The impact of planetary waves on the latitudinal displacement of sudden stratospheric warmings [PDF]
, 2013 The Northern Hemispheric winter is disturbed by large scale variability mainly caused by Planetary Waves (PWs), which interact with the mean flow and thus result in Sudden Stratospheric Warmings (SSWs).
P. Hoffmann +14 more
core +2 more sources
Changes in Stratospheric Temperatures and Their Implications for Changes in the Brewer–Dobson Circulation, 1979–2005 [PDF]
, 2012 Seasonally and vertically resolved changes in the strength of the Brewer–Dobson circulation (BDC) were inferred using temperatures measured by the Microwave Sounding Unit (MSU), Stratospheric Sounding Unit (SSU), and radiosondes.
Lamarque, Jean-Francois +5 more
core +5 more sources
Atmospheric transport and critical layer mixing in the troposphere and stratosphere [PDF]
, 2012 This thesis aims to improve the understanding of transport and critical layer mixing in the troposphere and stratosphere. A dynamical approach is taken based on potential vorticity which has long been recognised as the essential field inducing the flow ...
Smy, Louise Ann
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