Results 31 to 40 of about 8,237 (222)
Equatorial counter electrojets and polar stratospheric sudden warmings – a classical example of high latitude-low latitude coupling? [PDF]
Annales Geophysicae, 2009 Favored occurrences of Equatorial Counter Electrojets (CEJs) with a quasi 16-day periodicity over Trivandrum (8.5° N, 76.5° E, 0.5° N diplat.) in association with the polar Stratospheric Sudden Warming (SSW) events are presented.
C. Vineeth, T. Kumar Pant, R. Sridharan
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Influence of sudden stratospheric warmings on tropospheric winds
Meteorologische Zeitschrift, 2011 The influence of changes in the zonal mean stratospheric potential vorticity, associated with sudden stratospheric warmings, on the zonal mean zonal wind in the troposphere is investigated by piecewise potential vorticity inversion.
Yvonne Hinssen +2 more
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Changes in Stratospheric Transport and Mixing During Sudden Stratospheric Warmings [PDF]
Journal of Geophysical Research: Atmospheres, 2018 AbstractThe extreme disruptions of the wintertime stratospheric circulation during sudden stratospheric warmings (SSW) have large effects on tracer concentrations through alterations in transport. This study analyzes the changes in residual circulation and isentropic mixing associated with SSWs, by performing composites using reanalysis (European ...
A. de la Cámara +2 more
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The stratospheric polar vortex and sudden stratospheric warmings [PDF]
Weather, 2020 The polar vortex is the dominant feature of the wintertime stratosphere. Sometimes, it is unusually strong, while at others it is very weak or destroyed in an event known as a sudden stratospheric warming (SSW). Both can play an important role in driving the type and predictability of the weather we experience at the surface.
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The Major Sudden Stratospheric Warming Impact on Mid-Latitude Surface Weather [PDF]
EPJ Web of Conferences, 2020 The possible relation of a major sudden stratospheric warming (SSW) with the mid-latitude surface weather conditions was investigated using data from the ERA-Interim and NCEP–NCAR reanalyzes.
Wang Yuke +7 more
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Compensation between Resolved and Unresolved Wave Drag in the Stratospheric Final Warmings of the Southern Hemisphere [PDF]
, 2015 The role of planetary wave drag and gravity wave drag in the breakdown of the stratospheric polar vortex and its associated final warming in the Southern hemisphere is examined using MERRA reanalyses, and a middle atmosphere dynamical model. The focus of
Pulido, Manuel Arturo +1 more
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A Continuum of Sudden Stratospheric Warmings
Journal of the Atmospheric Sciences, 2009 Abstract The k-means cluster technique is used to examine 43 yr of daily winter Northern Hemisphere (NH) polar stratospheric data from the 40-yr ECMWF Re-Analysis (ERA-40). The results show that the NH winter stratosphere exists in two natural well-separated states.
Coughlin, K, Gray, L
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Another Drop in Water Vapor [PDF]
, 2014 In 2000 a sudden severe drop in stratospheric water vapor levels interrupted the supposed long-term increase of this greenhouse gas, an important contributor to global warming and climate variability.
Lossow, S. +3 more
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Defining Sudden Stratospheric Warmings
Bulletin of the American Meteorological Society, 2015 Abstract Sudden stratospheric warmings (SSWs) are large, rapid temperature rises in the winter polar stratosphere, occurring predominantly in the Northern Hemisphere. Major SSWs are also associated with a reversal of the climatological westerly zonal-mean zonal winds.
Amy H. Butler +5 more
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Arctic Stratosphere Dynamical Processes in the Winter 2021–2022
Atmosphere, 2022 The Arctic stratosphere winter season of 2021–2022 was characterized by a stable, cold stratospheric polar vortex with a volume of polar stratospheric clouds (PSC) close to the maximum values since 1980, before the beginning of minor sudden stratospheric
Pavel N. Vargin +2 more
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