Results 81 to 90 of about 547,637 (160)

Stratospheric and tropospheric seasonality and its implications for observation requirements in numerical weather prediction

Quarterly Journal of the Royal Meteorological Society, Volume 152, Issue 778, July 2026 Part A.
Daily time series of zonal‐mean zonal wind (m·s−1) at 10 hPa and 60° N from 1950 to 2021 from the ERA5 reanalysis. This shows huge variability in some seasons and very little in others. We provide evidence that high‐level observations, radiosonde and satellite, are more important during the extended winter season with its very large variability ...
Bruce Ingleby, Inna Polichtchouk
wiley   +1 more source

Statistical Properties of Dayside Single‐Crest Structure of the Equatorial Ionization Anomaly Derived From Global Ionospheric Maps

Space Weather, Volume 24, Issue 7, July 2026.
Abstract The classical Equatorial Ionization Anomaly (EIA) is characterized by two separated plasma accumulation regions off the geomagnetic equator and a plasma depletion region in between. Deviations from the typical double‐crest structure, including the single crest and multiple crests, have been observed.
Ping Zhou, Xing Meng, Jiawen Chen, Jiuhou Lei   +3 more
wiley   +1 more source

Identification and Classification of Stratospheric Sudden Warming Events [PDF]

, 2012
Analysis of northern hemisphere stratospheric data from 1978-2011 is used to identify and classify Stratospheric Sudden Warming events. A total of 41 events are identified during this 33 year period, resulting in an average occurrence rate of 1.24 events/
Ehrmann, Thomas S.
core   +1 more source

Observation of vertical coupling during a major sudden stratospheric warming by ICON and GOLD: a case study of the 2020/2021 warming event

Frontiers in Astronomy and Space Sciences
The response of the thermospheric daytime longitudinally averaged zonal and meridional winds and neutral temperature to the 2020/2021 major sudden stratospheric warming (SSW) is studied at low-to middle latitudes (0◦ - 40◦N) using observations by NASA’s ...
Erdal Yiğit, Ayden L. Gann, Alexander S. Medvedev, Federico Gasperini, Qian Wu, Qian Wu, Md Nazmus Sakib   +6 more
doaj   +1 more source

Signatures of low latitude–high latitude coupling in the tropical MLT region during sudden stratospheric warming [PDF]

, 2009
The present paper analyses the variations of daytime mesopause temperature over an equatorial station during polar Stratospheric Sudden Warming (SSW) events, indicating a possible dynamical coupling between the two regions, through the intensification of
Pant, T. K., Ramkumar, G., Kumar, K. K., R. Sridharan, C. Vineeth, Vineeth, C., G. Ramkumar, T. K. Pant, Sridharan, R., K. K. Kumar   +9 more
core   +1 more source

Attribution of Recent Change in the Stratospheric Temperature and Its Application to Future Projection

Geophysical Research Letters, Volume 53, Issue 10, 28 May 2026.
Abstract The stratospheric temperature has continued to decline over the past half‐century, in contrast to the steady increase in the tropospheric temperature. However, the future changes in stratospheric temperature under anthropogenic influences, as well as the specific role of stratospheric interactive chemistry in their attribution and projection ...
Shun Li, Jiankai Zhang, Seok‐Woo Son, Yang Chen, Chongyang Zhang, Zhe Wang, Junxuan Tang   +6 more
wiley   +1 more source

Forecast-based attribution of the role of stratospheric variability in weather extremes [PDF]

Weather and Climate Dynamics
Variability of the stratospheric polar vortex, particularly its dramatic breakdown during sudden stratospheric warming (SSW) events, has been linked to a number of surface weather extremes.
W. J. M. Seviour, J. Finkel, P. Rupp, R. Mudhar, R. Mudhar, A. H. Butler, C. I. Garfinkel, P. Hitchcock, B. Ayarzagüena, D.-C. Hong, Y.-K. Hyun, H. Kim, E.-P. Lim, D. De Maeseneire, G. Messori, G. Messori, G. Messori, G. Koren, M. Sigmond, I. R. Simpson, S.-W. Son   +20 more
doaj   +1 more source

On the composite response of the MLT to major sudden stratospheric warming events with elevated stratopause [PDF]

, 2016
Based on a climate-chemistry model (constrained by reanalyses below ~50 km), the zonal-mean composite response of the mesosphere and lower thermosphere (MLT) to major sudden stratospheric warming events with elevated stratopauses demonstrates the role of
Varavut Limpasuvan, Yvan J. Orsolini, Chandran, Amal, Orsolini, Yvan, Amal Chandran, Rolando R. Garcia, Garcia, Rolando R., Smith, Anne K., Limpasuvan, Varavut, Anne K. Smith   +9 more
core   +1 more source

Investigation of vertical wavenumber spectra during sudden stratospheric warming (SSW) events over the Indian region

, 2019
The vertical wavenumber (VWN) characteristics during sudden stratospheric warming (SSW) events (2003–2016) is investigated for the first time using temperature observation of Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) on-board
Priyanka Ghosh (664417), Kamran Ansari (6618389), Som Sharma (6618386)   +2 more
core   +1 more source

Examining variability in model skill during the 7 January 2013 sudden stratospheric warming event [PDF]

, 2017
Recent analyses of numerical weather prediction models have shown that stratospheric regime changes (e.g. strong and weak vortex events) are not skillfully predicted at medium-range lead times. Motivated by these recent analyses, this thesis investigates
Blufer, Jonathan Lee
core   +1 more source