Results 61 to 70 of about 668 (190)

Evaluation and assimilation of Arctic Weather Satellite data in the AROME‐Arctic forecast system

Quarterly Journal of the Royal Meteorological Society, EarlyView.
The Arctic Weather Satellite (AWS), launched in August 2024, is a prototype for the future EPS–Sterna constellation of small satellites carrying an innovative microwave sounder. We present the first assessment of AWS in the regional AROME‐Arctic numerical weather prediction system, covering post‐launch calibration results and the impact of AWS ...
Stéphanie Guedj, Per Dahlgren, Máté Mile   +2 more
wiley   +1 more source

Diversity of Stratospheric Error Growth Across Subseasonal Prediction Systems

Geophysical Research Letters
The stratosphere has previously been shown to be a significant source of subseasonal tropospheric predictability. The ability of ensemble prediction systems to appropriately exploit this depends on their ability to reproduce the statistical properties of
R. W. Lee, A. J. Charlton‐Perez
doaj   +1 more source

Rare Lightning and Convection Characteristics During Two Successive Tornadoes in Southern China

High Voltage, EarlyView.
ABSTRACT Systematic investigations into lightning characteristics of tornado storms in China remain scarce. This study comprehensively analyses rare lightning behaviour and overshooting top characteristics for two successive tornadoes during a long‐lived supercell in southern China on 27 April 2024.
Fengquan Li, Jiangling Zhi, Yu Wang, Hantao Tao, Zhaoming Li, Shanqiang Gu, Zhe Li, Zeyu Zhang, Lei Zhang, Guoying Tang   +9 more
wiley   +1 more source

A global non-hydrostatic model study of a downward coupling through the tropical tropopause layer during a stratospheric sudden warming [PDF]

Atmospheric Chemistry and Physics, 2015
The dynamical coupling process between the stratosphere and troposphere in the tropical tropopause layer (TTL) during a~stratospheric sudden warming (SSW) in boreal winter was investigated using simulation data from a global non-hydrostatic model (NICAM)
N. Eguchi, K. Kodera, T. Nasuno
doaj   +1 more source

Submonthly Polar Vortex Variability and Stratosphere–Troposphere Coupling in the Arctic

Journal of Climate, 2009
Abstract A principal component analysis is performed to characterize intraseasonal variability in the boreal stratospheric polar vortex. In contrast to previous studies, the current analysis examines daily zonal-mean variability within a limited spatial domain encompassing the stratospheric polar vortex.
Robert X. Black, Brent A. McDaniel
openaire   +2 more sources

Meridional Wind in the Upper Stratosphere: A Source of Winter NAO Predictability

Geophysical Research Letters
Improvement of subseasonal to seasonal North Atlantic winter forecasting requires better prediction of the North Atlantic Oscillation (NAO), the dominant mode of variability in the Northern Hemisphere. Despite recent research demonstrating the importance
Elizabeth Collingwood, Adam A. Scaife, Hua Lu, Bablu Sinha, John King, Robert Marsh, Gareth Marshall   +6 more
doaj   +1 more source

The tropospheric response to zonally asymmetric momentum torques: implications for the downward response to wave reflection and SSW events [PDF]

Weather and Climate Dynamics
The role of zonal structure in the stratospheric polar vortex for the surface response to weak vortex states and concurrently occurring wave reflection events is isolated using an intermediate-complexity moist general circulation model.
W. Ning, C. I. Garfinkel, J. Cohen, J. Cohen, I. P. White, J. Rao   +5 more
doaj   +1 more source

Stratosphere-troposphere coupling under the extreme conditions of the No-Montreal-Protocol scenario

, 2023
The Montreal Protocol and its amendments (MPA) have been a major success in preventing serious health damage from the destruction of the stratospheric ozone layer by chlorofluorocarbons (CFCs). Additionally, unabated CFC emissions would have significantly accelerated global warming and affected large-scale tropospheric circulation.
Timofei Sukhodolov, Franziska Zilker, Gabriel Chiodo, Tatiana Egorova, Marina Friedel, Eugene Rozanov, Jan Sedlacek, Svenja Seeber, Thomas Peter   +8 more
openaire   +2 more sources

Disentangling Anthropogenic Effects on Southern Hemisphere Circulation and Surface Climate: A Multi‐Model Large Ensemble Approach

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 16, 28 August 2026.
Abstract Southern Hemisphere (SH) circulation and surface climate changes are emerging in recent decades. For example, in most seasons, the SH Hadley cell edge and the eddy‐driven jet stream have shifted polewards, and the Southern Annular Mode (SAM) has trended towards its positive phase.
Leandro B. Díaz, Amy H. Butler, David Avisar, Sabine Bischof, Chloe L. Boehm, Ghyslaine Boschat, William J. Dow, Chaim I. Garfinkel, Kevin M. Grise, Hemant Khatri, Bianca Mezzina, Marisol Osman, Jonathon S. Wright, Panos J. Athanasiadis, Julie M. Arblaster, Erik Behrens, Thomas J. Bracegirdle, Yuanrui Chen, Eun‐Pa Lim, Amanda C. Maycock, Seung‐Ki Min, Julia Mindlin, Scott M. Osprey, Michael Sigmond, Doug Smith, Tiffany Shaw   +25 more
wiley   +1 more source

Intraseasonal Linkages of Winter Surface Air Temperature Between Eurasia and North America

Geophysical Research Letters
Wintertime temperature extremes sometimes show a continental linkage between Eurasia and North America (NA), but whether these connections are coincidental or dynamically robust remains unclear.
Xiaocen Shen, Lin Wang, Adam A. Scaife, Steven C. Hardiman   +3 more
doaj   +1 more source