Results 81 to 90 of about 2,944 (222)

Decadal Changes in Wintertime Frequency of Stratospheric Northern Annular Mode Events With Downward Propagation

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract The surface climate impact of stratospheric polar vortex anomalies depends on their downward propagation (DP) into the troposphere. We find pronounced decadal variability in the winter frequency of stratospheric Northern Annular Mode (SNAM) events that exhibit DP (1951–2024).
Yang Liu, Yueyue Yu, Ming Cai, Rongcai Ren, Lijuan Chen, Donghan Wang   +5 more
wiley   +1 more source

How predictable are sudden stratospheric warmings?

, 2023
Sudden stratospheric warming (SSW) can have a significant downward impact on surface weather, which can last for a few weeks to months, a better understanding of the predictability and the mechanisms of SSW can potentially enhance surface weather prediction in the subseasonal-to-seasonal (S2S) timescale.
openaire   +3 more sources

Transport to the Extratropical Stratosphere by Overshooting Storms in Idealized Simulations

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 8, 28 April 2026.
Abstract Deep convection is a significant source of water to the extratropical stratosphere which can alter radiative properties and contribute to ozone loss. Previous studies find it responsible for 40% of mid‐latitude water vapor above 380K. However, the amount of hydration from individual storms and the mechanisms that initiate mixing is less ...
Devin P. Bissell, Christopher J. Nowotarski, Kenneth P. Bowman, Anita D. Rapp   +3 more
wiley   +1 more source

Do Eclipse‐Induced Thermospheric TADs Originate From Above or Below?

Geophysical Research Letters, Volume 53, Issue 7, 16 April 2026.
Abstract Solar eclipses generate significant wave activity in the Earth's upper atmosphere. The source region of eclipse‐induced Traveling Atmospheric Disturbances (TADs) in the upper thermosphere—particularly the relative contributions of gravity waves from the thermosphere itself versus the lower atmosphere—remains unknown. Using the Whole Atmosphere
Yu Jiao, Jing Liu, Shuhan Li, Joseph M. McInerney, Jianyong Li, Yuyan Yang   +5 more
wiley   +1 more source

Influences of sudden stratospheric warmings on the ionosphere above Okinawa [PDF]

Atmospheric Chemistry and Physics
We analyzed the ionosonde observations from Okinawa (26.7° N, 128.1° E; magnetic latitude: 17.0° N) for the years from 1972 to 2023. Okinawa is in the northern low-latitude ionosphere, where the influences of sudden stratospheric warmings (SSWs) on the ...
K. Hocke, K. Hocke, W. Wang, W. Wang, G. Ma   +4 more
doaj   +1 more source

Quasi-Biennial Oscillation and Sudden Stratospheric Warmings during the Last Glacial Maximum

Atmosphere, 2020
The quasi-biennial oscillation (QBO) and sudden stratospheric warmings (SSWs) during the Last Glacial Maximum (LGM) are investigated in simulations using the Whole Atmosphere Community Climate Model version 6 (WACCM6).
Qiang Fu, Mingcheng Wang, Rachel H. White, Hamid A. Pahlavan, Becky Alexander, John M. Wallace   +5 more
doaj   +1 more source

The Met Office HadGEM3-ES chemistry–climate model: evaluation of stratospheric dynamics and its impact on ozone [PDF]

Geoscientific Model Development, 2017
Free-running and nudged versions of a Met Office chemistry–climate model are evaluated and used to investigate the impact of dynamics versus transport and chemistry within the model on the simulated evolution of stratospheric ozone.
S. C. Hardiman, N. Butchart, F. M. O'Connor, S. T. Rumbold   +3 more
doaj   +1 more source

Ground‐Based Microwave Measurements of ClO and O3 Over Scott Base, Antarctica

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 7, 16 April 2026.
Abstract We present measurements from a new microwave instrument that has been deployed at Scott Base, Antarctica, primarily to measure ClO. The new instrument allows for the extension of the time series of lower stratospheric ClO measurements begun in 1996 at this site, while some of the technical improvements offer the possibility of making ...
Gerald E. Nedoluha, R. Michael Gomez, Ian Boyd, Helen Neal, Douglas R. Allen, Alan Parrish, Brian J. Connor, Michael Kotkamp, Kate McKenzie, Eric L. Fleming, Thomas F. Hanisco, Michelle L. Santee   +11 more
wiley   +1 more source

The role of gravity wave drag optimization in the splitting of the Antarctic vortex in the 2002 sudden stratospheric warming [PDF]

, 2018
The impact of gravity wave drag on the Antarctic sudden stratospheric warming (SSW) in 2002 is examined through a mechanistic middle atmosphere model combined with a variational data assimilation system.
Pulido, Manuel, Rodas, Claudio, Scheffler, Guillermo   +2 more
core   +2 more sources

Seasonal Predictions and Their Applications in the Mediterranean Region: Part I—Sources of Predictability and Prediction Skill

International Journal of Climatology, Volume 46, Issue 5, April 2026.
The ability to predict climate fluctuations at seasonal timescales offers significant socio‐economic benefits. However, limited understanding of predictability mechanisms and model errors hinders forecast quality. Recent research has improved forecasting systems and data quality.
Gualdi Silvio, Javier García‐Serrano, Constantin Ardilouze, Silvia Terzago, Veronica Torralba, Wafae Badi, Lauriane Batté, Fatima Driouech, Kristina Fröhlich, Ernesto Rodriguez Camino, Esteban Rodriguez Guisado, Massimiliano Pasqui, Andrea Toreti   +12 more
wiley   +1 more source