Results 51 to 60 of about 516,730 (208)

Observation of mesospheric air inside the arctic stratospheric polar vortex in early 2003 [PDF]

, 2005
During several balloon flights inside the Arctic polar vortex in early 2003, unusual trace gas distributions were observed, which indicate a strong influence of mesospheric air in the stratosphere.
Levin, Ingeborg, M. Pirre, Wetzel, G., I. Levin, T. Wetter, Levin, I., Schmidt, Ulrich (Prof. Dr.), Wetter, Thomas, Oelhaf, Hermann, Bönisch, Harald, Engel, A., Schmidt, U., Huret, Nathalie, Bönisch, H., N. Huret, Pirre, Michel, Oelhaf, H., H. Oelhaf, Schmidt, Ulrich, Reddmann, Thomas, Möbius, Tanja, K. Grunow, G. Wetzel, U. Schmidt, Wetter, T., Engel, Andreas, Haase, Hans-Peter, Grunow, Katja, H. Bönisch, A. Engel, T. Reddmann, Reddmann, T., H.-P. Haase, Möbius, T., Haase, H.-P., Wetzel, Gerald, Grunow, K., T. Möbius   +37 more
core   +2 more sources

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

Northern winter stratospheric temperature and ozone responses to ENSO inferred from an ensemble of Chemistry Climate Models [PDF]

, 2009
The connection between the El Ni˜no Southern Oscillation (ENSO) and the Northern polar stratosphere has been established from observations and atmospheric modeling. Here a systematic inter-comparison of the sensitivity of the modeled stratosphere to ENSO
H. Struthers, Calvo, Natalia, Calvo Fernández, Natalia, Garny, Hella, E. Manzini, C. Cagnazzo, Douglass, A.R., M. Dameris, Chipperfield, Martyn P., Manzini, E. ; https://orcid.org/, Calvo, N., N. Calvo, Gettelman, A., Stenke, A., Akiyoshi, Hideharu, Garny, H., Deushi, M., Shepherd, Theodore G., M. Deushi, Giorgetta, M. A., Deushi, Makoto, D. Plummer, Giorgetta, Marco, Douglass, Anne, K. Shibata, H. Garny, E. Rozanov, Plummer, David, T. G. Shepherd, Akiyoshi, H., Manzini, E., Plummer, D.A., Struthers, Hamish, Chipperfield, M.P., Giorgetta, M.A., A. Douglass, M. A. Giorgetta, Manzini, Elisa, Shepherd, T., Dameris, Martin, Chipperfield, M., Douglass, A., M. Chipperfield, Bekki, Slimane, Tian, Wenshou, Giorgetta, M., Plummer, D., Tian, W., Dameris, M., Cagnazzo, C., Stenke, Andrea, H. Akiyoshi, Bekki, S., Cagnazzo, Chiara, Rozanov, Eugene, Gettelman, Andrew, A. Stenke, A. M. Fischer, Stenke, Andrea; id_orcid, W. Tian, Shibata, Kiyotaka, Shibata, K., Struthers, H., S. Bekki, Fischer, A. M., Fischer, A.M., Shepherd, T. G., Shepherd, T.G., Fischer, A., A. Gettelman, Rozanov, E.   +70 more
core   +2 more sources

A Case Study of the Solar and Lunar Semidiurnal Tide Response to the 2013 Sudden Stratospheric Warming [PDF]

, 2023
This study investigates the response of the semidiurnal tide (SDT) to the 2013 major sudden stratospheric warming (SSW) event using meteor radar wind observations and mechanistic tidal model simulations.
Hibbins, Robert, Peter Brown, Stober, Gunter, Espy, Patrick, Jacobi, Christoph, Kero, Johan, Brown, Peter, Christoph Jacobi, Gunter Stober, Robert Hibbins, Willem E. van Caspel, Patrick Espy, Johan Kero, van Caspel, Willem E.   +13 more
core   +2 more sources

Arctic Stratosphere Dynamical Processes in the Winter 2021–2022

Atmosphere, 2022
The Arctic stratosphere winter season of 2021–2022 was characterized by a stable, cold stratospheric polar vortex with a volume of polar stratospheric clouds (PSC) close to the maximum values since 1980, before the beginning of minor sudden stratospheric
Pavel N. Vargin, Andrey V. Koval, Vladimir V. Guryanov   +2 more
doaj   +1 more source

How Sudden Stratospheric Warming Affects the Whole Atmosphere [PDF]

Eos, 2018
High above Earth’s surface, air temperatures occasionally increase suddenly, producing widespread effects on weather, air chemistry, and telecommunications.
Pedatella, N., Chau, J., Schmidt, H., Goncharenko, L., Stolle, C., Hocke, K., Harvey, V., Funke, B., Siddiqui, T.   +8 more
openaire   +4 more sources

Influence of January 2009 stratospheric warming on HF radio wave propagation in the low-latitude ionosphere

Solar-Terrestrial Physics, 2016
We have considered the influence of the January 23–27, 2009 sudden stratospheric warming (SSW) event on HF radio wave propagation in the equatorial ionosphere. This event took place during extremely low solar and geomagnetic activity.
Kotova D.S., Klimenko M.V., Klimenko V.V., Zakharov V.E., Bessarab F.S., Korenkov Yu.N.   +5 more
doaj   +1 more source

Impact of Weak‐Constraint Four‐Dimensional Variational data assimilation on the prediction of a sudden stratospheric warming event in 2024

Quarterly Journal of the Royal Meteorological Society, EarlyView.
The Weak‐Constraint Four‐Dimensional Variational (WC‐4DVAR) system markedly improved the analysis and forecasting of the 2024 sudden stratospheric warming (SSW) event. It reduced biases and enhanced 7–9 day predictions of temperature across the SSW life cycle, with the most pronounced gains for winds also during the critical onset period.
Shaoying Li, Weimin Zhang, Shuo Ma, Bainian Liu, Yanlai Zhao, Xiaoqun Cao   +5 more
wiley   +1 more source

Attribution of subseasonal cold‐spell forecasts to remote drivers using nudging experiments

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Nudging experiments with the European Centre for Medium‐Range Weather Forecasts (ECMWF) model show that Northern European cold spells can arise from different drivers. Some events are predominantly influenced by stratospheric dynamics, while others also involve important tropospheric processes.
Irene Erner, Alexey Karpechko, Inna Polichtchouk, Frédéric Vitart   +3 more
wiley   +1 more source

A vortex dynamics perspective on stratospheric sudden warmings [PDF]

, 2009
A vortex dynamics approach is used to study the underlying mechanisms leading to polar vortex breakdown during stratospheric sudden warmings (SSWs).
Matthewman, N.J.
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