Results 61 to 70 of about 746 (167)

Non‐Migrating Thermal Tides in the Martian Lower Atmosphere Observed by EMM/EMIRS

Journal of Geophysical Research: Planets, Volume 131, Issue 5, May 2026.
Abstract Thermal tides significantly influence Martian atmospheric dynamics and radiative transfer. However, the excitation mechanisms of non‐migrating tides, exhibiting diverse spatial structures, remain poorly understood due to the limited number of observations.
Cong Sun, Siteng Fan, François Forget, Michael D. Smith, Sandrine Guerlet, Tao Li, Chengyun Yang, Lulu Li, Khalid M. Badri, Samuel A. Atwood, Christopher S. Edwards, Justin Deighan, Hessa R. Al Matroushi, Ehouarn Millour   +13 more
wiley   +1 more source

Aerosol composition of the tropical upper troposphere [PDF]

Atmospheric Chemistry and Physics, 2009
Aerosol composition was measured by the NOAA single-particle mass spectrometer (PALMS) aboard the NASA WB-57 high altitude aircraft platform during two Aura Validation Experiment (AVE) campaigns based in Costa Rica in 2004 and 2006. These studies yielded
K. D. Froyd, D. M. Murphy, T. J. Sanford, D. S. Thomson, J. C. Wilson, L. Pfister, L. Lait   +6 more
doaj  

Transport to the Extratropical Stratosphere by Overshooting Storms in Idealized Simulations

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 8, 28 April 2026.
Abstract Deep convection is a significant source of water to the extratropical stratosphere which can alter radiative properties and contribute to ozone loss. Previous studies find it responsible for 40% of mid‐latitude water vapor above 380K. However, the amount of hydration from individual storms and the mechanisms that initiate mixing is less ...
Devin P. Bissell, Christopher J. Nowotarski, Kenneth P. Bowman, Anita D. Rapp   +3 more
wiley   +1 more source

Impact of Non‐Classical Gravity‐Wave Dynamics on Middle‐Atmosphere Mean Flow and Solar Tides

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 8, 28 April 2026.
Abstract Conventional gravity‐wave (GW) parameterizations neglect three aspects of GW dynamics. Instead of momentum and entropy fluxes they use Eliassen‐Palm fluxes, thereby neglecting the possibility that resolved flow are not in geostrophic and hydrostatic balance.
T. Kühner, G. S. Völker, U. Achatz
wiley   +1 more source

Transport of aerosols into the UTLS and their impact on the Asian monsoon region as seen in a global model simulation [PDF]

Atmospheric Chemistry and Physics, 2013
An eight-member ensemble of ECHAM5-HAMMOZ simulations for a boreal summer season is analysed to study the transport of aerosols in the upper troposphere and lower stratosphere (UTLS) during the Asian summer monsoon (ASM).
S. Fadnavis, K. Semeniuk, L. Pozzoli, M. G. Schultz, S. D. Ghude, S. Das, R. Kakatkar   +6 more
doaj   +1 more source

Atmospheric Adjustments to In Situ Cirrus Formation in Ice Supersaturated Regions

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 8, 28 April 2026.
Abstract High‐level ice clouds exert a net warming on the climate system because their greenhouse effect outweighs their albedo effect. Focusing on in‐situ cirrus, their formation involves the conversion of upper‐tropospheric water vapor into ice crystals.
Jérémie Juvin‐Quarroz, Audran Borella, Patryk Kiepas, Thomas Dubos, Olivier Boucher, Nicolas Bellouin   +5 more
wiley   +1 more source

Overshooting of clean tropospheric air in the tropical lower stratosphere as seen by the CALIPSO lidar [PDF]

Atmospheric Chemistry and Physics, 2011
The evolution of aerosols in the tropical upper troposphere/lower stratosphere between June 2006 and October 2009 is examined using the observations of the space borne CALIOP lidar aboard the CALIPSO satellite. Superimposed on several volcanic plumes and
J.-P. Vernier, J.-P. Pommereau, L. W. Thomason, J. Pelon, A. Garnier, T. Deshler, J. Jumelet, J. K. Nielsen   +7 more
doaj   +1 more source

The Life Cycle of a Stratospheric Smoke Plume as Seen From EarthCARE—Tracking a Plume From Canada to Europe

Geophysical Research Letters, Volume 53, Issue 7, 16 April 2026.
Abstract At the end of May 2025, extremely strong wildfires in Canada produced several pyrocumulonimbus clouds lifting the smoke particles up to the lower stratosphere. Stratospheric aerosol optical depths of more than 2.5 were observed by the ATmospheric LiDAR (ATLID) onboard of the Earth Cloud, Aerosol and Radiation Explorer (EarthCARE) satellite ...
Moritz Haarig, Holger Baars, Leonard König, David P. Donovan, Albert Ansmann, Sergey Khaykin, Romain Ceolato, Benedikt Gast, Crisofer Jimenez, Athena A. Floutsi, Robin J. Hogan, Annabel Chantry, Fabien Marnas, Johanna Roschke, Gerd‐Jan van Zadelhoff, Ulla Wandinger   +15 more
wiley   +1 more source

Influence of Variations in Gravity Wave Properties on Cirrus Ice Number Concentrations Produced by Homogeneous Freezing in the Tropical Tropopause Layer

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 7, 16 April 2026.
Abstract In this study, we examine the impact of variations in gravity wave properties on the ice crystal number concentrations in the tropical tropopause layer (TTL). Analysis of quasi‐Lagrangian superpressure balloon measurements from the Stratéole‐2 campaign shows that high‐frequency waves dominate the occurrence of relatively large vertical wind ...
E. J. Jensen, M. Corcos, B. Kärcher
wiley   +1 more source

Tropical Tropopause Layer Evolution During QBO Disruptions

Journal of Geophysical Research: Atmospheres
AbstractThe tropical tropopause layer (TTL) is studied during 2015/16 and 2019/20 quasi‐biennial oscillation (QBO) disruption events using GNSS‐RO and SWOOSH satellite observations and the ERA5 reanalysis. By compositing temperature, water vapor, and tropical upwelling during different phases of QBO and QBO disruptions (XQBO), we show that XQBO events ...
Lan Luan, Paul W. Staten, William J. Randel, Ying‐Hwa Kuo   +3 more
openaire   +1 more source