Results 51 to 60 of about 945 (138)

The impact of polar stratospheric ozone loss on Southern Hemisphere stratospheric circulation and climate [PDF]

Atmospheric Chemistry and Physics, 2014
The impact of polar stratospheric ozone loss resulting from chlorine activation on polar stratospheric clouds is examined using a pair of model integrations run with the fully coupled chemistry climate model UM-UKCA.
J. Keeble, P. Braesicke, N. L. Abraham, H. K. Roscoe, J. A. Pyle   +4 more
doaj   +1 more source

Volcanic Eruptions Reorganize Climate Teleconnections: Detection via Riemannian Covariance Fingerprinting

Geophysical Research Letters, Volume 53, Issue 15, 16 August 2026.
Abstract Standard detection and attribution of volcanic forcing targets spatial temperature anomalies. We show that the covariance structure of climate variability carries an independent volcanic fingerprint. Applying tangent‐space regression on the symmetric positive definite manifold SPD(8) to 40 years of eight teleconnection indices, we detect ...
Sloan Austermann
wiley   +1 more source

Global Atmospheric Circulation Reorganization Drives Contrasting Wind Regime Changes Across Hemispheric Latitudes

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 15, 16 August 2026.
Abstract Near‐surface wind regimes govern critical Earth system processes including dust mobilization, ocean mixing, and wildfire spread, yet their multi‐decadal evolution under anthropogenic forcing remains poorly constrained. Here we quantify extreme wind frequency changes (1981–2024) using ERA5‐Land reanalysis with a monthly aggregation approach ...
Adil Salhi, Essam Heggy
wiley   +1 more source

Structure, Propagation and Variability of the 5‐Day Rossby‐Haurwitz Wave

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 15, 16 August 2026.
Abstract The 5‐day wave is the gravest free Rossby mode predicted by the Laplace shallow water equations, with a latitudinally symmetric, zonal wavenumber one theoretical structure in geopotential extending from pole to pole. It propagates westward along the equator at about 98 m s−1 ${\mathrm{s}}^{-1}$ and was first observed in surface pressure data ...
G. N. Kiladis, R. A. Madden
wiley   +1 more source

Stratospheric and tropospheric contributions to North American cold temperatures and subsequent North Atlantic jet stream anomalies

Weather and Climate Extremes
Stratospheric variability can modulate tropospheric circulation and surface weather, yet its contribution relative to tropospheric drivers remains difficult to quantify. We address this by applying quantile generalized additive models (QGAMs) to flexibly
Michael K. Schutte, Leonardo Olivetti, Meriem Krouma, Gabriele Messori   +3 more
doaj   +1 more source

Stratospheric response to Arctic sea ice retreat and associated planetary wave propagation changes

Tellus: Series A, Dynamic Meteorology and Oceanography, 2013
The stratospheric response to the observed Arctic sea ice retreat is analysed based on European Centre for Medium-Range Weather Forecast (ECMWF) Re-Analysis Interim (ERA-Interim) atmospheric data from 1979–2012.
Ralf Jaiser, Klaus Dethloff, Dörthe Handorf   +2 more
doaj   +1 more source

Atmospheric Constituent Data Assimilation in NASA's Goddard Earth Observing System

Earth and Space Science, Volume 13, Issue 8, August 2026.
Abstract Many of today's most significant and urgent scientific questions, including those about the impact of human activity on air quality and radiative forcing, require the synthesis of observations of atmospheric constituents and scientific theory.
B. Weir, K. Wargan, C. A. Keller, K. E. Knowland, P. A. Wales, V. Shah, B. M. Karpowicz, N. Balashov, L. E. Ott, R. Todling, S. E. Cohn, S. Pawson   +11 more
wiley   +1 more source

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

Localization and Classification of Gravity Wave Events From VIIRS Day/Night Band Satellite Imagery Using Machine Learning Techniques

Earth and Space Science, Volume 13, Issue 8, August 2026.
Abstract Gravity waves in the upper mesosphere produce diverse spatial patterns in nighttime airglow, but their global morphology has been difficult to characterize because manual identification is impractical for the massive satellite image archive. We developed a machine learning framework to detect and classify gravity wave events in imagery from ...
Yuta Hozumi, Jia Yue, Seraj Al Mahmud Mostafa, Chenxi Wang, Jianwu Wang, Sanjay Purushotham, Steven D. Miller   +6 more
wiley   +1 more source

Solar Proton Events Enhance Polar Upper Stratospheric Downward Transport: Evidence From Ozone‐Traced Descent

Geophysical Research Letters, Volume 53, Issue 14, 28 July 2026.
Abstract The Brewer‐Dobson circulation (BDC) is a fundamental driver of trace gas transport in the middle atmosphere. Direct quantification of its descent rate remains observationally challenging. Here, we leverage wintertime solar proton events (SPEs) as natural experiments and use ozone‐depletion trajectories as dynamical tracers to quantify polar ...
Yuting Wang, Hui Li, Yaxuan Li, Yudi Pan, Wei Xu, Binbin Ni, Chi Wang   +6 more
wiley   +1 more source