Results 201 to 210 of about 10,329 (228)
Quarterly Journal of the Royal Meteorological Society, 2022 AbstractHere we explore the stratospheric influence on the predictability of Eurasian cold‐spell events using the European Centre for Medium‐Range Weather Forecasts (ECMWF) ensemble hindcasts obtained from the Subseasonal‐to‐Seasonal (S2S) archive. To isolate the stratospheric influence, we subsampled two groups of hindcasts according to the strength ...
Irina Statnaia +2 more
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A blocking view of the stratosphere‐troposphere coupling [PDF]
Journal of Geophysical Research D: Atmospheres, 2014 AbstractDynamical influence from the stratosphere is known to play a role in shaping the wintertime tropospheric circulation patterns. Observations suggest that this influence is strongest following weak and strong polar vortex events, termed sudden stratospheric warmings (SSWs) and vortex intensification (VI) events, respectively.
Paolo Davini, James A Anstey
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Effects of stratosphere‐troposphere chemistry coupling on tropospheric ozone [PDF]
Journal of Geophysical Research, 2010 A new, computationally efficient coupled stratosphere‐troposphere chemistry‐climate model (S/T‐CCM) has been developed based on three well‐documented components: a 64‐level general circulation model from the UK Met Office Unified Model, the tropospheric chemistry transport model (STOCHEM), and the UMSLIMCAT stratospheric chemistry module.
Wenshou Tian +2 more
exaly +3 more sources
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Stratosphere–Troposphere Coupling during Spring Onset
Journal of Climate, 2006Abstract The authors perform an observational study of the relation between stratospheric final warmings (SFWs) and the boreal extratropical circulation. SFW events are found to provide a strong organizing influence upon the large-scale circulation of the stratosphere and troposphere during the period of spring onset.
Brent A. McDaniel +2 more
openaire +1 more source
The solar cycle and stratosphere–troposphere dynamical coupling
Journal of Atmospheric and Solar-Terrestrial Physics, 2005Abstract Observations and modeling studies support the hypothesis that solar cycle/ozone interactions create temperature and wind anomalies in the tropical upper stratosphere near 1 hPa. During extended winter (October–April), interactions with planetary-scale Rossby waves draw low-latitude stratospheric wind anomalies poleward and downward through ...
Mark P. Baldwin, Timothy J. Dunkerton
exaly +2 more sources
Stratosphere‐Troposphere Coupling of Extreme Stratospheric Wave Activity in CMIP6 Models
Journal of Geophysical Research: Atmospheres, 2023AbstractExtreme stratospheric wave activity has been suggested to be connected to surface temperature anomalies, but some key processes are not well understood. Using observations, we show that the stratospheric events featuring weaker‐than‐normal wave activity are associated with increased North American (NA) cold extreme risks before and near the ...
Xiuyuan Ding, Gang Chen, Weiming Ma
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Stratosphere–Troposphere Coupling and Links with Eurasian Land Surface Variability
Journal of Climate, 2007Abstract A diagnostic of Northern Hemisphere winter extratropical stratosphere–troposphere interactions is presented to facilitate the study of stratosphere–troposphere coupling and to examine what might influence these interactions.
Judah Cohen +3 more
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Stratosphere-Troposphere Coupling
2018This chapter discusses stratosphere-troposphere coupling starting from a very basic background knowledge. Later it focused on the individual role of the Sun and QBO to regulate such coupling. It explores Holton-Tan effect. The combined influence of the Sun and QBO to regulate upper stratospheric polar temperature was also attended.
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Monthly Weather Review, 2023
Abstract The representation of the stratosphere and stratosphere–troposphere coupling processes is evaluated in the subseasonal Global Ensemble Forecast System, version 12 (GEFSv12), hindcasts. The GEFSv12 hindcasts develop systematic stratospheric biases with increasing lead time, including a too strong boreal wintertime stratospheric polar vortex. In
Zachary D. Lawrence +6 more
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Abstract The representation of the stratosphere and stratosphere–troposphere coupling processes is evaluated in the subseasonal Global Ensemble Forecast System, version 12 (GEFSv12), hindcasts. The GEFSv12 hindcasts develop systematic stratospheric biases with increasing lead time, including a too strong boreal wintertime stratospheric polar vortex. In
Zachary D. Lawrence +6 more
openaire +1 more source
Impacts of April Stratosphere–Troposphere Coupling on the South Asian Premonsoon Circulation
Journal of Climate, 2023Abstract The premonsoon circulation over South Asia in May shows remarkable interannual variations, and it can modulate the onset of the Asian summer monsoon. The present study derives two dominant stratosphere–troposphere modes over the North Atlantic in April via applying principal component (PC) analysis to regional geopotential height during 1979 ...
Chengyang Zhang +6 more
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