Results 31 to 40 of about 423,094 (343)

Long-term lidar observations of wintertime gravity wave activity over northern Sweden [PDF]

open access: yesAnnales Geophysicae, 2014
This paper presents an analysis of gravity wave activity over northern Sweden as deduced from 18 years of wintertime lidar measurements at Esrange (68° N, 21° E).
B. Ehard   +4 more
doaj   +1 more source

Time-Reversal Analogy by Nonlinear Acoustic–Gravity Wave Triad Resonance

open access: yesFluids, 2019
Time reversal of free-surface water (gravity) waves due to a sudden change in the effective gravity has been extensively studied in recent years. Here, we show that an analogy to time-reversal can be obtained using nonlinear acoustic-gravity wave theory.
Usama Kadri
doaj   +1 more source

Intercomparison of stratospheric gravity wave observations with AIRS and IASI [PDF]

open access: yesAtmospheric Measurement Techniques, 2014
Gravity waves are an important driver for the atmospheric circulation and have substantial impact on weather and climate. Satellite instruments offer excellent opportunities to study gravity waves on a global scale.
L. Hoffmann   +6 more
doaj   +1 more source

GRACILE: a comprehensive climatology of atmospheric gravity wave parameters based on satellite limb soundings [PDF]

open access: yesEarth System Science Data, 2018
Gravity waves are one of the main drivers of atmospheric dynamics. The spatial resolution of most global atmospheric models, however, is too coarse to properly resolve the small scales of gravity waves, which range from tens to a few thousand ...
M. Ern   +7 more
doaj   +1 more source

Noise generation in the solid Earth, oceans, and atmosphere, from non-linear interacting surface gravity waves in finite depth [PDF]

open access: yes, 2012
Oceanic pressure measurements, even in very deep water, and atmospheric pressure or seismic records, from anywhere on Earth, contain noise with dominant periods between 3 and 10 seconds, that is believed to be excited by ocean surface gravity waves. Most
Ardhuin, Fabrice, Herbers, Thomas H. C.
core   +4 more sources

Influence of the upper gravity-wave damping layer on precipitation over complex terrain

open access: yesFrontiers in Environmental Science, 2022
The upper boundary condition of a numerical model can significantly influence the model prediction results. This study used the Weather Research and Forecasting model to introduce the Rayleigh damping layer in the complex terrain of southern Gansu, China.
H. X. Duan   +12 more
doaj   +1 more source

Removing spurious inertial instability signals from gravity wave temperature perturbations using spectral filtering methods [PDF]

open access: yesAtmospheric Measurement Techniques, 2020
Gravity waves are important drivers of dynamic processes in particular in the middle atmosphere. To analyse atmospheric data for gravity wave signals, it is essential to separate gravity wave perturbations from atmospheric variability due to other ...
C. Strube, M. Ern, P. Preusse, M. Riese
doaj   +1 more source

Quantum state correction of relic gravitons from quantum gravity [PDF]

open access: yes, 1996
The semiclassical approach to quantum gravity would yield the Schroedinger formalism for the wave function of metric perturbations or gravitons plus quantum gravity correcting terms in pure gravity; thus, in the inflationary scenario, we should expect ...
B. Allen   +11 more
core   +2 more sources

Atmospheric inertia-gravity waves retrieved from level-2 data of the satellite microwave limb sounder Aura/MLS [PDF]

open access: yesAnnales Geophysicae, 2016
The temperature profiles of the satellite experiment Aura/MLS are horizontally spaced by 1.5° or 165 km along the satellite orbit. These level-2 data contain valuable information about horizontal fluctuations in temperature, which are mainly induced ...
K. Hocke   +11 more
doaj   +1 more source

A class of colliding waves in metric-affine gravity, nonmetricity and torsion shock waves [PDF]

open access: yes, 2000
By using our recent generalization of the colliding waves concept to metric-affine gravity theories, and also our generalization of the advanced and retarded time coordinate representation in terms of Jacobi functions, we find a general class of ...
Alberto Garcı́a   +11 more
core   +2 more sources

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