Results 61 to 70 of about 9,396 (179)

Temporal variations in the acoustic signal from faculae

, 2012
The integrated brightness of the Sun shows variability on time-scales from minutes to decades. This variability is mainly caused by pressure mode oscillations, by granulation and by dark spots and bright faculae on the surface of the Sun.
Aigrain, Anderson, Appourchaux, Appourchaux, Berger, Berger, Brandenburg, Böhm-Vitense, C. Karoff, Chaplin, Chaplin, Chaplin, De Pontieu, Del, Fletcher, Fröhlich, Fröhlich, García, Gough, Handberg, Harvey, Harvey, Houdek, Iben, Kjeldsen, Lefebvre, Libbrecht, Lomb, Ludwig, Ludwig, Metcalfe, Michel, Nordlund, Toutain, Trampedach, Vázquez Ramió, Wedemeyer-Böhm, Wilks   +37 more
core   +1 more source

Benchmarking Atmospheric Circulation Variability in an AI Emulator, ACE2, and a Hybrid Model, NeuralGCM

Geophysical Research Letters, Volume 53, Issue 4, 28 February 2026.
Abstract Physics‐based atmosphere‐land models with prescribed sea surface temperature have notable successes but also biases in their ability to represent atmospheric variability compared to observations. Recently, AI emulators and hybrid models have emerged with the potential to overcome these biases, but still require systematic evaluation against ...
I. Baxter, H. A. Pahlavan, P. Hassanzadeh, K. Rucker, T. A. Shaw   +4 more
wiley   +1 more source

Quasi-Biennial Oscillation influence on Australian summer rainfall

npj Climate and Atmospheric Science
The variability and distribution of Australia’s summer rainfall are influenced by modes of climate variability on multi-week to multi-year time scales.
Xiaoxuan Jiang, Neil J. Holbrook, Andrew G. Marshall, Peter T. Love   +3 more
doaj   +1 more source

Modulation of winter precipitation associated with tropical cyclone of the western North Pacific by the stratospheric Quasi-Biennial oscillation

Environmental Research Letters, 2021
Tropical cyclone precipitation (TCP) has increasing impacts on many coastal regions under global warming. Causes of TCP variation have been principally explored in the troposphere.
Lei Wang, Lin Wang, Wen Chen, Jingliang Huangfu   +3 more
doaj   +1 more source

An Examination of Anomalously Low Column Ozone in the Southern Hemisphere Midlatitudes During 1997 [PDF]

, 2002
[1] Observations from both ground-based and satellite instruments show record low column ozone abundance between 20°S and 40°S during 1997. The 1997 monthly averaged column ozone from the Total Ozone Mapping Spectrometer (TOMS) is up to 25 Dobson units ...
Cordero, Eugene C., Nathan, Terrence R.
core   +2 more sources

Role of the Diurnal Tide in Driving the Westward Phase of the Mesospheric Semiannual Oscillation Around March Equinox

Geophysical Research Letters, Volume 53, Issue 3, 16 February 2026.
Abstract The mesospheric semiannual oscillation (MSAO) in tropical zonal‐mean zonal winds exhibits a strong westward phase around March equinox. It has been thought that the migrating diurnal tide (DW1) plays a role in the initiation of this phase because DW1 peaks around this time and satellite observations have shown it to undergo wave breaking.
Christopher S. Krier, Hanli Liu, Guiping Liu   +2 more
wiley   +1 more source

Steady Source Gravity Wave Parameterizations and the Observed Momentum Flux Intermittency

Geophysical Research Letters, Volume 53, Issue 3, 16 February 2026.
Abstract Observational estimates of gravity wave momentum fluxes obtained from analyses of super‐pressure balloon tracks show an approximate log normal distribution in space and time. One study has suggested that a non‐orographic gravity wave parameterization with a steady source could reproduce this distribution through variability in the background ...
Robert C. King, Brian Green, Aditi Sheshadri   +2 more
wiley   +1 more source

Prediction of European Winter 2023/24: Influence of a Strong El Niño

Atmospheric Science Letters, Volume 27, Issue 2, February 2026.
The UK winter seasonal outlook for 2023/24 gave good guidance with increased chances of mild, wet and windy conditions, particularly in early winter, which verified well when compared with observations. December was particularly stormy. Our analysis suggests the key driver was the well forecast, strong El Niño event, with the late winter European ...
Sarah Ineson, Chris Almond, Paul Davies, Nick J. Dunstone, Chris K. Folland, Margaret Gordon, Steven C. Hardiman, Jeff R. Knight, Peter McLean, Yu Nie, Adam A. Scaife, Doug M. Smith, Nicky Stringer, Hazel E. Thornton, Brent Walker   +14 more
wiley   +1 more source

Quasi‐Biennial Oscillation Influence on Tropical Convection and El Niño Variability

Geophysical Research Letters
The Quasi‐Biennial Oscillation (QBO) of descending zonal winds is the leading mode of tropical stratospheric variability. Numerous studies have explored its connection with the troposphere, including its sensitivity to El Niño‐Southern Oscillation (ENSO).
Mario Rodrigo, Javier García‐Serrano, Ileana Bladé   +2 more
doaj   +1 more source

Interannual variability of the Tropical Atlantic independent of and associated with ENSO: Part II. The South Tropical Atlantic [PDF]

, 2006
Two dominant ocean-atmosphere modes of variability on interannual timescales were defined in Part I of this work, namely, the North Tropical Atlantic (NTA) and South Tropical Atlantic (STA) modes.
Barreiro, Bishop, Bjerknes, CabosNarvaez, Carton, Chiang, Compo, Curtis, Darnell, Delecluse, Diaz, Dommenget, Enfield, Fairall, Florenchie, Giannini, Gupta, Handoh, Handoh, Hirst, Hirst, Horel, Hoskins, Huang, Huang, Huang, Huang, Joyce, Kistler, Klein, Latif, Liebmann, Liu, Mariotti, Matthews, Mo, Mo, Philander, Pozo-Vazquez, Ruiz-Barradas, Ruiz-Barradas, Saravanan, Servain, Spencer, Sterl, Sutton, Tourre, Tseng, Wu, Wu, Xie, Xie, Xie, Zebiak   +53 more
core   +1 more source