Results 71 to 80 of about 2,944 (222)

The sudden stratospheric warming in January 2021

Environmental Research Letters, 2021
Abstract Using the ERA5 reanalysis, sea surface temperature and sea ice observations, and the real-time multivariate Madden–Julian index, this study explores a sudden stratospheric warming (SSW) in January 2021, its favorable conditions, and the near surface impact.
Qian Lu, Jian Rao, Zhuoqi Liang, Dong Guo, Jingjia Luo, Siming Liu, Chun Wang, Tian Wang   +7 more
openaire   +3 more sources

Contribution of stratospheric warmings to temperature trends in the middle atmosphere from the lidar series obtained at Haute-Provence Observatory (44°N) [PDF]

, 2012
International audienceThis study describes a method to calculate long-term temperature trends, as an alternative to the ones based on monthly mean temperatures, which are highly impacted by the high winter variability partially due to wave-mean flow ...
Angot, Guillaume, Claud, Chantal, Hauchecorne, Alain, Keckhut, Philippe   +3 more
core   +4 more sources

Sudden stratospheric warmings forced by mountains

Geophysical Research Letters, 1980
A global, quasigeostrophic model of planetary wave interaction with the mean zonal flow has been used to simulate sudden stratospheric warmings forced by mean tropospheric zonal winds interacting with orography. Planetary waves m = 1 and 2 are simultaneously computed and interact with each other only through the mean zonal flow.
Mark R. Schoeberl, Darrell F. Strobel
openaire   +1 more source

A Mechanism Involving Solar Ultraviolet Variations for Modulating the Interannual Climatology of the Middle Atmosphere [PDF]

, 1990
In years of low solar activity, free traveling wave modes in the upper stratosphere are dominated by atmospheric normal modes such as the 16-day wave. However, within a 4-year interval centered on the 1980 to 1981 solar maximum, cross-spectral analyses ...
Hood, L. L., Jirikowic, J. L.
core   +1 more source

Supervised Learning Approaches to Classify Stratospheric Warming Events [PDF]

, 2012
Sudden stratospheric warmings are prominent examples of dynamical wave–mean flow interactions in the Arctic stratosphere during Northern Hemisphere winter.
Akaike, Andrews, Avriel, Baldwin, Baldwin, Baldwin, Baldwin, Bishop, Burges, Burnham, Butler, Calvo, Camp, Camp, Charlton, Charney, Christian Blume, Fawcett, Gray, Holton, Holton, Illia Horenko, Kalnay, Katja Matthes, Kohavi, Kurkova, Labitzke, Labitzke, Labitzke, Labitzke, Labitzke, Manzini, Marques de Sá, Martius, Matsuno, Matthewman, McIntyre, Mitchell, Mitchell, Montgomery, Naujokat, Priestley, Richter, Ripley, Scherhag, Schwarz, Simmons, Spackman, Theodoridis, Trenberth, Uppala, Vapnik, von Storch, Wilks   +53 more
core   +1 more source

Initial Atmospheric Waves Experiment (AWE) Imaging Analyses: Gravity Wave Sources, Temperatures, Pseudomomentum Fluxes, and Horizontal Wavenumber Spectra at the OH Layer

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 9, 16 May 2026.
Abstract The NASA Atmospheric Waves Experiment (AWE) employs an OH imager that began measurements aboard the International Space Station (ISS) on 22 November 2023. The motivation for AWE was to quantify gravity wave (GW) responses to diverse sources and their influences extending into the mesosphere and higher altitudes.
David C. Fritts, Robert G. Stockwell, Thomas S. Lund, P.‐Dominique Pautet, Kaoru Sato, Dai Koshin, Michael J. Taylor, Ludger Scherliess   +7 more
wiley   +1 more source

Predicting Sudden Stratospheric Warmings Using Video Prediction Methods

Geophysical Research Letters
Sudden Stratospheric Warmings (SSWs) are weather phenomena occurring in polar regions, and have a profound impact on mid‐latitude cold waves. In this paper, within a deep learning framework, we introduce video prediction techniques into SSW events ...
Yuhao Du, Jiankai Zhang, Xinyuan Cheng, Yixiong Lu, Douwang Li, Wenshou Tian   +5 more
doaj   +1 more source

Predicting sudden stratospheric warming 2018 and its climate impacts with a multi‐model ensemble [PDF]

, 2018
Sudden stratospheric warmings (SSWs) are significant source of enhanced subseasonal predictability, but whether this source is untapped in operational models remains an open question.
Balmaseda, Magdalena, Charlton-Perez, Andrew, Tyrrell, Nicholas, Vitart, Frederic, Yu Karpechko, Alexey   +4 more
core   +1 more source

Climatic Higher‐Order Balanced Winds Beyond Geostrophic and Gradient Wind Fields

Earth and Space Science, Volume 13, Issue 5, May 2026.
Abstract We present a novel approach to derive three‐dimensional Climatic Higher‐Order Balanced (CHOB) wind fields from thermodynamic state variables in the free troposphere and stratosphere. The CHOB method is developed for monthly synoptic‐scale wind field estimation, utilizing commonly used balanced winds (geostrophic and gradient wind) enhanced by ...
I. Nimac, J. Unegg, J. Danzer
wiley   +1 more source

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
openaire   +1 more source