Results 71 to 80 of about 1,013 (182)

Large ensemble assessment of the Arctic stratospheric polar vortex

, 2023
Abstract. The stratospheric polar vortex (SPV) is a phenomenon comprising strong westerly winds during winter in both hemispheres. Especially in the Northern Hemisphere (NH) the SPV is highly variable and is frequently disrupted by sudden stratospheric warmings (SSWs).
Ales Kuchar, Maurice Öhlert, Roland Eichinger, Christoph Jacobi   +3 more
openaire   +2 more sources

Polar Vortex Disruptions by High Latitude Ocean Warming

Geophysical Research Letters
Mid‐latitude extreme cold outbreaks are associated with disruptions of the polar vortex, which often happen abruptly in connection to a sudden stratospheric warming.
Mostafa E. Hamouda, Alice Portal, Claudia Pasquero   +2 more
doaj   +1 more source

The Asynchronous Evolution of Cold Waves Over China Revealed by 3D Spatiotemporal Tracking

Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.
Abstract Cold waves pose substantial risks to ecosystems, infrastructure, and society. While most studies have examined their station‐level frequency or regional intensity, the joint behaviors in both time and space remain largely unexplored. Here, we apply a three‐dimensional connected‐component labeling algorithm to daily temperature observations ...
Xin Zhang, Hongze Cai, Kaicun Wang, Yanyi He, Liu Liu, Hongquan Sun, Zhonggen Wang, Siquan Yang   +7 more
wiley   +1 more source

The Role of ENSO Phase Transition in the Delayed North Atlantic Oscillation Response

Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.
Abstract The El Niño–Southern Oscillation (ENSO) is the dominant mode of interannual variability in the Earth system, exerting profound influences on global weather and climate. One notable impact is its ability to generate a dipole‐like sea level pressure anomaly pattern over the North Atlantic, resembling the North Atlantic Oscillation (NAO), with El
Bingning Meng, Lei Zhang
wiley   +1 more source

Internal Variability Dominates the Spatial Heterogeneity of Recent Trends in Eurasian Winter Cold Extremes

Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.
Abstract Eurasia, with its large and climate‐vulnerable population, has experienced increased cold extremes despite global warming, yet their pronounced spatial heterogeneity remains poorly understood. We examine low‐frequency trends in Eurasian cold extremes over recent decades.
Anqi Liu, Daokai Xue, Danqing Huang
wiley   +1 more source

INFLUENCE OF SOLAR-GEOPHYSICAL FACTORS ON THE STATE OF THE STRATOSPHERIC POLAR VORTEX

Proceedings of the 23rd All-Russia Conference on Solar and Solar-Terrestrial Physics, 2019
The stratospheric polar vortex is one of the most important connecting links between solar activity and circulation of the lower atmosphere at extratropical latitudes. In this work, the changes in the vortex intensity (western wind velocity in the high latitude stratosphere) are studied in relation to various phenomena caused by solar activity.
S. V. Veretenenko, M. G. Ogurtsov
openaire   +1 more source

Observation of Polar Stratospheric Clouds down to the Mediterranean coast [PDF]

Atmospheric Chemistry and Physics, 2007
A Polar Stratospheric Cloud (PSC) was detected for the first time in January 2006 over Southern Europe after 25 years of systematic lidar observations.
P. Keckhut, Ch. David, M. Marchand, S. Bekki, J. Jumelet, A. Hauchecorne, M. Höpfner   +6 more
doaj  

Influence of Wintertime Polar Vortex Variation on the Climate over the North Pacific during Late Winter and Spring

Atmosphere, 2019
The effects of wintertime stratospheric polar vortex variation on the climate over the North Pacific Ocean during late winter and spring are analyzed using the National Centers for Environmental Predictions, version 2 (NCEP2) reanalysis dataset.
Kequan Zhang, Tao Wang, Mian Xu, Jiankai Zhang   +3 more
doaj   +1 more source

A 400‐Year Antarctic Ice‐Core Perchlorate Record Reveals Variability in Stratospheric Chlorine Chemistry

Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.
Abstract Perchlorate (ClO4−) in polar ice preserves past chlorine oxidation chemistry; however, multi‐centennial Antarctic ClO4− records and the mechanisms controlling their variability remain poorly constrained. Here, we present the first 400‐year (1616−2016) ClO4− record from an Antarctic ice core, revealing two regimes separated around 1980.
Wenzhi Zhou, Su Jiang, Zhe Li, Bo Zhang, Danhe Wang, Dongqi Wang, Guitao Shi   +6 more
wiley   +1 more source

A hexagon in Saturn’s northern stratosphere surrounding the emerging summertime polar vortex

Nature Communications, 2018
AbstractSaturn’s polar stratosphere exhibits the seasonal growth and dissipation of broad, warm vortices poleward of ~75° latitude, which are strongest in the summer and absent in winter. The longevity of the exploration of the Saturn system by Cassini allows the use of infrared spectroscopy to trace the formation of the North Polar Stratospheric ...
Fletcher, L., Orton, G., Sinclair, J., Guerlet, S., Read, P., Antuñano, A., Achterberg, R., Flasar, F., Irwin, P., Bjoraker, G., Hurley, J., Hesman, B., Segura, M., Gorius, N., Mamoutkine, A., Calcutt, S.   +15 more
openaire   +7 more sources