Results 61 to 70 of about 547,637 (160)

Sudden stratospheric warming [PDF]

, 2020
Sudden stratospheric warmings (SSWs) are impressive fluid dynamical events in which large and rapid temperature increases in the winter polar stratosphere (⁓10‐50km) are associated with a complete reversal of the climatological wintertime westerly winds.
Butler, Amy, Garny, Hella, Gerber, Edwin P., Butchart, Neal, Chaim I. Garfinkel, Domeisen, Daniela I. V., Charlton‐Perez, Andrew J., Domeisen, Daniela, Michaela I. Hegglin, Hegglin, Michaela, Pedatella, Nicholas, Pedatella, Nicholas M., Hella Garny, Butchart, Neil, Ayarzagüena, Blanca, Birner, Thomas, Garfinkel, Chaim I., Thomas Birner, Garfinkel, Chaim, Baldwin, Mark, Butler, Amy H., Andrew J. Charlton‐Perez, Blanca Ayarzagüena, Ulrike Langematz, Charlton-Perez, Andrew J., Hegglin, Michaela I., Langematz, Ulrike, Mark P. Baldwin, Daniela I. V. Domeisen, Neal Butchart, Baldwin, Mark P., Amy H. Butler, Edwin P. Gerber, Domeisen, Daniela; id_orcid, Charlton-Perez, Andrew, Ayarzagüena Porras, Blanca, Nicholas M. Pedatella   +36 more
core   +1 more source

Connections Between Stratospheric GWs, the Polar Vortex, and MSTIDs From Longitudinally Distinct Regions During Nine Arctic Winters

Journal of Geophysical Research: Space Physics, Volume 131, Issue 9, September 2026.
Abstract Midlatitude medium‐scale traveling ionospheric disturbances (MSTIDs) are a common source of ionospheric variability that may influence GNSS‐based positioning and can disrupt HF‐communication channels. Here, we present a comprehensive nine‐winter analysis (2014–2023) that establishes a robust connection between stratospheric gravity waves (GWs)
S. Derghazarian, L. Goncharenko, V. L. Harvey, S.‐R. Zhang, A. Coster, E. Becker, G. Kwon   +6 more
wiley   +1 more source

VARIABILITY OF IONOSPHERIC F2 REGION DUE TO SUDDEN STRATOSPHERIC WARMING EVENT OF 2017 [PDF]

Proceedings on Engineering Sciences
We analyzed the impact of minor Arctic sudden stratospheric warming (SSW) event of 2017 on the ionospheric F2 region, using Digisonde data from a low-mid latitude Indian station, Delhi (28.6°N, 77.2°E, 19.2°N geomagnetic latitude, 42.4°N dip).
Qadeer Ahmed, Anshul Singh , N. Praneetha , Ankit Gupta , Arti Bhardwaj , Puja Goel , Arun Kumar Upadhayaya   +6 more
doaj   +1 more source

Validation of Global Ionospheric Specification (GIS) Electron Density Measurements During Solar Minimum to Solar Maximum Under Quiet and Disturbed Geomagnetic Conditions

Space Weather, Volume 24, Issue 9, September 2026.
Abstract Global Ionospheric Specification (GIS) three‐dimensional electron density profiles constructed by assimilating the line‐of‐sight total electron content (TEC) from global navigation satellite system (GNSS) radio occultation (RO) measurements by FORMOSAT‐7/COSMIC‐2 (F7/C2) and ground‐based receiver network from international GNSS service ...
P. K. Rajesh, C. H. Charles Lin, C. Y. Lin, T. Matsuo, H. Jin, S. Perwitasari, M. Nishioka, Chao‐Yen Chen   +7 more
wiley   +1 more source

Observational Evidence of Distinct Excitation Pathways for Migrating and Non-Migrating Tides in the Mesosphere-Lower Thermosphere During the 2021 Sudden Stratospheric Warming

Atmosphere
We investigate the excitation and variability of migrating and non-migrating diurnal and semi-diurnal tides in the mesosphere and lower thermosphere (MLT) during the 2021 Northern Hemisphere sudden stratospheric warming (SSW).
Reuben Acheampong Asamoah, Gizaw Mengistu Tsidu, Gemechu Fanta Garuma, Leonard Kofitse Amekudzi   +3 more
doaj   +1 more source

Modulation of Stratosphere‐to‐Troposphere Transport of Ozone by North Pacific Weather Patterns

Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.
Abstract Stratosphere‐to‐troposphere transport (STT) of ozone is a major natural source of tropospheric ozone and is tightly linked to both stratospheric and tropospheric circulations. However, the complex interactions of drivers make it challenging to understand the subseasonal variability of STT.
Jaewon Lee, Yutian Wu, Simon H. Lee
wiley   +1 more source

SuPerPoV: Score and Evolution of the Stratospheric Polar Vortex via Persistent Homology

Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.
Abstract Classifying the stratospheric polar vortex provides predictability for surface weather on extended‐range timescales. However, all definitions of these events proposed in over 60 years of study depend on empirically chosen parameters and yield different results when they change.
Jake Cordes, Barbara Giunti, Zheng Wu
wiley   +1 more source

Stratosphere–Troposphere Coupling During Cold Air Outbreaks in the Eastern United States

Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.
Abstract Cold air outbreaks (CAOs) are extreme weather events characterized by the equatorward displacement of polar air. This study investigates CAOs occurring along the East Coast of the US and establishes that approximately 16% are driven by stratosphere‐troposphere coupling through wave dynamics.
Katherine Barragan, Cristiana Stan
wiley   +1 more source

Observational Evidence of Distinguishable Weather Patterns for Three Types of Sudden Stratospheric Warming During Northern Winter

Frontiers in Earth Science, 2021
Sudden stratospheric warming (SSW) events often lead to a cold surface air temperature anomaly over the extratropical regions. In this study, we propose, through observational evidence, that the types of SSW determine the severity of the cold anomaly ...
Hyesun Choi, Joo-Hong Kim, Baek-Min Kim, Seong-Joong Kim   +3 more
doaj   +1 more source

Solar Proton Events Enhance Polar Upper Stratospheric Downward Transport: Evidence From Ozone‐Traced Descent

Geophysical Research Letters, Volume 53, Issue 14, 28 July 2026.
Abstract The Brewer‐Dobson circulation (BDC) is a fundamental driver of trace gas transport in the middle atmosphere. Direct quantification of its descent rate remains observationally challenging. Here, we leverage wintertime solar proton events (SPEs) as natural experiments and use ozone‐depletion trajectories as dynamical tracers to quantify polar ...
Yuting Wang, Hui Li, Yaxuan Li, Yudi Pan, Wei Xu, Binbin Ni, Chi Wang   +6 more
wiley   +1 more source