Results 51 to 60 of about 615 (153)

Weak Tropical Tropospheric OH Response to Idealized ENSO

Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.
Abstract The hydroxyl radical (OH) is a key oxidant for methane. Previous studies suggest that OH exhibits interannual variability linked to the El Nino–Southern Oscillation (ENSO), but the sign, magnitude, and underlying mechanisms of this response remain uncertain.
Qindan Zhu, Arlene M. Fiore, Robert Pincus, Jian Guan, Clare E. Singer, Brian Medeiros, Paolo Giani   +6 more
wiley   +1 more source

Interannual Influence of Antarctic Sea Ice on Southern Hemisphere Stratosphere‐Troposphere Coupling

Geophysical Research Letters
While weakening of the boreal polar vortex may be caused by autumnal Arctic sea ice loss, less is known about the interannual influence of Antarctic sea ice on stratosphere‐troposphere coupling in the Southern Hemisphere.
Divya Rea, Dillon Elsbury, Amy H. Butler, Lantao Sun, Yannick Peings, Gudrun Magnusdottir   +5 more
doaj   +1 more source

Lidar Ratios and Fluorescence Properties of Stratospheric Volcanic Sulfate

Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.
Abstract From January to June 2025, a stratospheric sulfate layer originating from the eruptions of the Ruang volcano in April 2024 could be observed with a multi‐wavelength Raman and fluorescence lidar over Leipzig, Germany. The aerosol‐optical depth of the stratospheric volcanic sulfate was <0.02 ${< } 0.02$, decreasing with time.
Benedikt Gast, Cristofer Jimenez, Albert Ansmann, Holger Baars, Ulla Wandinger   +4 more
wiley   +1 more source

Stratosphere–Troposphere Coupling During Cold Air Outbreaks in the Eastern United States

Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.
Abstract Cold air outbreaks (CAOs) are extreme weather events characterized by the equatorward displacement of polar air. This study investigates CAOs occurring along the East Coast of the US and establishes that approximately 16% are driven by stratosphere‐troposphere coupling through wave dynamics.
Katherine Barragan, Cristiana Stan
wiley   +1 more source

A strong stratospheric harbinger for cold extremes: Weak polar vortex transition from displacement to split pattern

Weather and Climate Extremes
Weak stratospheric polar vortex (WSPV) events are dynamically connected with the variations in the tropospheric circulation, serving as crucial harbingers for surface cold extremes in the Northern Hemisphere.
Murong Zhang, Xiao-Yi Yang, Yipeng Huang
doaj   +1 more source

On the surface impact of Arctic stratospheric ozone extremes

Environmental Research Letters, 2015
A comprehensive stratosphere-resolving atmospheric model, with interactive stratospheric ozone chemistry, coupled to ocean, sea ice and land components is used to explore the tropospheric and surface impacts of large springtime ozone anomalies in the ...
N Calvo, L M Polvani, S Solomon
doaj   +1 more source

Vertical Redistribution of Ozone Precursor Proxies During Typhoon Peripheral Periods: Insights From MAX‐DOAS and GEOS‐Chem

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 16, 28 August 2026.
Abstract Typhoon peripheral conditions modulate the formation and atmospheric fate of ozone precursors, yet the vertical distribution and the underlying physical‐chemical drivers remain less constrained. Here, we examine the vertical profiles of ozone precursor proxies, including formaldehyde (HCHO), glyoxal (CHOCHO), and nitrogen dioxide (NO2), in the
Xicheng Li, Song Liu, Peng Zhang, Xue Zhang, Yali Li, Xingyi Wu, Jiaming Zhang, Yuchen Huang, Xiangyu Luan, Longchang Zhang, Xin Yang, Huizhong Shen, Jianhuai Ye, Chen Wang, Tzung‐May Fu, Lei Zhu   +15 more
wiley   +1 more source

Observed connection between the Madden–Julian oscillation and the upper tropospheric biennial oscillation

Environmental Research Letters
It has been found that the quasi-biennial oscillation (QBO) in the stratosphere have an important impact on the Madden Julian oscillation (MJO). In this study, we show that there is an obvious biennial oscillation in the tropical upper troposphere, which
Feiyang Wang, Tanlong Dai, Yuanyuan Han
doaj   +1 more source

Towards a More Earth‐Like Circulation in Idealized Models

Journal of Advances in Modeling Earth Systems, 2018
Idealized models are useful for the investigation of dynamical phenomena in which physical processes play a secondary role. Typically, such models employ highly idealized topography and zonally symmetric equilibrium temperatures as forcings.
Zheng Wu, Thomas Reichler
doaj   +1 more source

Simulation of the ENSO influence on the extra-tropical middle atmosphere

Earth, Planets and Space, 2019
The impact of the El Niño Southern Oscillation (ENSO) on the Northern Hemisphere mid-winter zonal wind, temperature, and stationary planetary waves (SPWs) is evaluated using the Middle and Upper Atmosphere Model and Modern-Era Retrospective Analysis for ...
Tatiana S. Ermakova, Olga G. Aniskina, Irina A. Statnaia, Maxim A. Motsakov, Alexander I. Pogoreltsev   +4 more
doaj   +1 more source