Results 21 to 30 of about 423,094 (343)

Gravity wave penetration into the thermosphere: sensitivity to solar cycle variations and mean winds [PDF]

open access: yesAnnales Geophysicae, 2008
We previously considered various aspects of gravity wave penetration and effects at mesospheric and thermospheric altitudes, including propagation, viscous effects on wave structure, characteristics, and damping, local body forcing, responses to solar
D. C. Fritts, S. L. Vadas
doaj   +1 more source

Estimation of orographically induced wave drag in the stable boundary layer during the CASES-99 experimental campaign [PDF]

open access: yes, 2009
This paper addresses the quantification of gravity wave drag due to small hills in the stable boundary layer. A single column atmospheric model is used to forecast wind and temperature profiles in the boundary layer.
Holtslag, A.A.M.   +2 more
core   +3 more sources

Climatology, long-term variability and trend of resolved gravity wave drag in the stratosphere revealed by ERA5 [PDF]

open access: yesWeather and Climate Dynamics
Internal gravity waves have well-known importance for atmospheric dynamics, transport and coupling between atmospheric layers, and their parameterized forcing affects the circulation in climate models, especially in the stratosphere.
Z. Procházková   +2 more
doaj   +1 more source

Response of Ozone to a Gravity Wave Process in the UTLS Region Over the Tibetan Plateau

open access: yesFrontiers in Earth Science, 2020
In this paper, ERA5 reanalysis data from the European Center for Medium-Range Weather Forecasts and the Weather Research and Forecasting (WRF) mesoscale model are used to compare and simulate a topographic gravity wave event that occurred over the ...
Shujie Chang   +5 more
doaj   +1 more source

Satellite observations of middle atmosphere gravity wave absolute momentum flux and of its vertical gradient during recent stratospheric warmings [PDF]

open access: yesAtmospheric Chemistry and Physics, 2016
Sudden stratospheric warmings (SSWs) are circulation anomalies in the polar region during winter. They mostly occur in the Northern Hemisphere and affect also surface weather and climate.
M. Ern   +12 more
doaj   +1 more source

Compensation between Resolved and Unresolved Wave Drag in the Stratospheric Final Warmings of the Southern Hemisphere [PDF]

open access: yes, 2015
The role of planetary wave drag and gravity wave drag in the breakdown of the stratospheric polar vortex and its associated final warming in the Southern hemisphere is examined using MERRA reanalyses, and a middle atmosphere dynamical model. The focus of
Pulido, Manuel Arturo   +1 more
core   +1 more source

Accelerating Atmospheric Gravity Wave Simulations Using Machine Learning: Kelvin‐Helmholtz Instability and Mountain Wave Sources Driving Gravity Wave Breaking and Secondary Gravity Wave Generation

open access: yesGeophysical Research Letters, 2023
Gravity waves (GWs) and their associated multi‐scale dynamics are known to play fundamental roles in energy and momentum transport and deposition processes throughout the atmosphere.
Wenjun Dong   +5 more
doaj   +1 more source

Estimation of gravity wave parameters to alleviate the delay in the Antarctic vortex breakup in general circulation models [PDF]

open access: yes, 2018
The impact of optimal parameters in a non-orographic gravity wave drag parameterization on the middle atmosphere circulation of the Southern hemisphere is examined. Optimal parameters are estimated using a data assimilation technique.
Pulido, Manuel Arturo   +1 more
core   +1 more source

Quadratic Theory of Gravity with a Scalar Field and Type I Shapovalov Wave Spacetimes

open access: yesUniverse, 2022
For the quadratic theory of gravity with a scalar field, exact solutions are found for gravitational-wave models in Shapovalov I-type spacetimes, which do not arise in models of the general theory of relativity.
Konstantin Osetrin   +2 more
doaj   +1 more source

Gravity wave turbulence revealed by horizontal vibrations of the container [PDF]

open access: yes, 2012
We experimentally study the role of the forcing on gravity-capillary wave turbulence. Previous laboratory experiments using spatially localized forcing (vibrating blades) have shown that the frequency power-law exponent of the gravity wave spectrum ...
Falcon, Eric, Issenmann, Bruno
core   +4 more sources

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