Results 21 to 30 of about 7,842 (133)

Large Proportions of Surface Ozone and Premature Mortality Due to a Stratospheric Intrusion Event in North China

International Journal of Climatology, Volume 46, Issue 6, May 2026.
This study, by examining a typical stratospheric intrusion event that occurred in North China from 30 to 31 July 2021, found that the event led to a sharp increase in near‐surface ozone concentrations by 23 ppbv within 36 h, accounting for 40% of the total observed ozone levels, with localised peaks exceeding 30 ppbv.
Yinghan Sun, Zhicong Yin, Yijia Zhang
wiley   +1 more source

Laboratory Characterization of Cryogenic Frost‐Point Hygrometers Using an Upper Air Simulator

Meteorological Applications, Volume 33, Issue 3, May/June 2026.
Cryogenic frost‐point hygrometers (CFHs) are widely used to accurately measure water vapor pressure in the upper atmosphere. The performance of CFHs has been thoroughly evaluated using an Upper Air Simulator (UAS), a controlled laboratory system designed to generate and regulate frost‐point levels across a range of temperatures.
Sang‐Wook Lee, Seonwoong Kim, Sunghun Kim, Young‐Suk Lee, Yong‐Gyoo Kim   +4 more
wiley   +1 more source

Abnormal Circulation Changes in the Winter Stratosphere, Detected Through Variations of D Region Ionospheric Absorption [PDF]

, 1984
A method to detect stratospheric warmings using ionospheric absorption records obtained by an Absorption Meter (method A3) is introduced. The activity of the stratospheric circulation and the D region ionospheric absorption as well as other atmospheric ...
Delamorena, B. A.
core   +1 more source

The role of convective overshooting clouds in tropical stratosphere-troposphere dynamical coupling [PDF]

, 2015
International audienceThis paper investigates the role of deep convection and overshooting convective clouds in stratosphere–troposphere dynamical coupling in the tropics during two large major stratospheric sudden warming events in January 2009 and ...
Claud, Chantal, Eguchi, N., Funatsu, Beatriz M., Kodera, K.   +3 more
core   +5 more sources

Climatic Higher‐Order Balanced Winds Beyond Geostrophic and Gradient Wind Fields

Earth and Space Science, Volume 13, Issue 5, May 2026.
Abstract We present a novel approach to derive three‐dimensional Climatic Higher‐Order Balanced (CHOB) wind fields from thermodynamic state variables in the free troposphere and stratosphere. The CHOB method is developed for monthly synoptic‐scale wind field estimation, utilizing commonly used balanced winds (geostrophic and gradient wind) enhanced by ...
I. Nimac, J. Unegg, J. Danzer
wiley   +1 more source

Drivers of Mid‐Latitude Quiet‐Time Longitude Variations in Ionospheric Density

Journal of Geophysical Research: Space Physics, Volume 131, Issue 5, May 2026.
Abstract The aim of this study is to provide an observational benchmark of mid‐latitude quiet‐time variability in winds, O/N2, and TEC across longitude and local time to provide a foundation for future model–data comparison studies. The quiet‐time ionospheric structure is not uniform but rather exhibits pronounced longitudinal and local‐time ...
K. R. Greer, L. P. Goncharenko, V. L. Harvey, C. Cullens   +3 more
wiley   +1 more source

Relative Contributions of Lower‐Atmosphere Tidal and Solar‐Magnetospheric Forcings to the Day‐to‐Day Variability of F‐Region Electron Density

Journal of Geophysical Research: Space Physics, Volume 131, Issue 5, May 2026.
Abstract We use Thermosphere Ionosphere Electrodynamics General Circulation Model simulations nudged to realistic tides and their statistical day‐to‐day variabilities (DTDVs), derived from Michelson Interferometer for Global High‐Resolution Thermospheric Imaging/Ionospheric Connection Explorer observations, to estimate the relative importance of tidal ...
Xian Lu, Jens Oberheide, Deepali Aggarwal   +2 more
wiley   +1 more source

The association between stratospheric weak polar vortex events and cold air outbreaks

, 2009
Previous studies have identified an association between near-surface temperature anomalies in the Northern Hemisphere and weak stratospheric polar westerlies.
Baldwin, Baldwin, Baldwin, Barnett, Bracegirdle, Bueh, Cai, Cellitti, Charlton, Charney, Chen, Chen, Cohen, Cordero, Garfinkel, Hurrell, Hurrell, Jeong, Kalnay, Kenyon, Kolstad, Konrad, Kuroda, Limpasuvan, Limpasuvan, Lorenz, Martius, Matsuno, Matsuno, McIntyre, Mercer, Mukougawa, Otterå, Pickart, Pinto, Polvani, Reichler, Renfrew, Scaife, Scaife, Skogseth, Song, Stephenson, Takaya, Thompson, Thompson, Thompson, Walsh   +47 more
core   +1 more source

Decadal Changes in Wintertime Frequency of Stratospheric Northern Annular Mode Events With Downward Propagation

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract The surface climate impact of stratospheric polar vortex anomalies depends on their downward propagation (DP) into the troposphere. We find pronounced decadal variability in the winter frequency of stratospheric Northern Annular Mode (SNAM) events that exhibit DP (1951–2024).
Yang Liu, Yueyue Yu, Ming Cai, Rongcai Ren, Lijuan Chen, Donghan Wang   +5 more
wiley   +1 more source

Atmospheric temperature responses to solar irradiance and geomagnetic activity [PDF]

, 2005
The relative effects of solar irradiance and geomagnetic activity on the atmospheric temperature anomalies (Ta) are examined from the monthly to interdecadal timescales. Geomagnetic Ap (Ap) signals are found primarily in the stratosphere, while the solar
Hua Lu, Martin J. Jarvis, Hans-F. Graf, Peter C. Young, Richard B. Horne, Arnold, Baldwin, Baldwin, Boberg, Bochnicek, Brasseur, Bucha, Callis, Callis, Clilverd, Crooks, Davis, Ebisuzaki, Egorova, Garrett, Gleisner, Gray, Gray, Haigh, Haigh, Haigh, Haigh, Haigh, Hinteregger, Holton, Hood, Hoyt, Jackman, Keckhut, Kodera, Kodera, Kodera, Kuroda, Labitzke, Labitzke, Labitzke, Labitzke, Labitzke, Labitzke, Labitzke, Labitzke, Lean, Lean, Matthes, Mayaud, Naito, Naujokat, Orsolini, Pascoe, Randall, Randall, Randel, Renard, Rinsland, Rottman, Rozanov, Salby, Scaife, Seidel, Sheeley, Shindell, Shindell, Siskind, Solomon, Thejll, Thiebaux, Thorne, Thorne, van Loon, Vennerstrom, Young, Young   +76 more
core   +2 more sources