Results 31 to 40 of about 829,957 (291)

Planetary-Wave-Induced Transport in the Stratosphere [PDF]

open access: yesJournal of the Atmospheric Sciences, 2003
In the stratosphere, chemical tracers are drawn systematically from the equator to the pole. This observed Brewer–Dobson circulation is driven by wave drag, which in the stratosphere arises mainly from the breaking and dissipation of planetary-scale Rossby waves. While the overall sense of the circulation follows from fundamental physical principles, a
Pendlebury, Diane, Shepherd, Theodore G.
openaire   +2 more sources

A comparative study of winds and tidal variability in the mesosphere/lower-thermosphere region over Bulgaria and the UK [PDF]

open access: yesAnnales Geophysicae, 2000
Meteor radars located in Bulgaria and the UK have been used to simultaneously measure winds in the mesosphere/lower-thermosphere region near 42.5°N, 26.6°E and 54.5°N, 3.9°W, respectively, over the period January 1991 to June 1992.
D. Pancheva   +5 more
doaj   +1 more source

Stationary planetary wave propagation in Northern Hemisphere winter – climatological analysis of the refractive index [PDF]

open access: yesAtmospheric Chemistry and Physics, 2007
The probability density on a height-meridional plane of negative refractive index squared f(nk2<0) is introduced as a new analysis tool to investigate the climatology of the propagation conditions of stationary planetary waves based on NCEP/NCAR ...
Q. Li   +3 more
doaj  

Nonlinear interaction of planetary waves and the semidiurnal tide as seen from midlatitude mesopause region winds measured at Collm, Germany

open access: yesMeteorologische Zeitschrift, 1999
Wind measurements in the midlatitude mesopause region in 1983-1996 provide a climatology of planetary waves, as they are seen in oscillations of the prevailing wind.
Ch. Jacobi
doaj   +1 more source

The vertical structure of oceanic Rossby waves: a comparison of high-resolution model data to theoretical vertical structures [PDF]

open access: yes, 2011
Tests of the new Rossby wave theories that have been developed over the past decade to account for discrepancies between theoretical wave speeds and those observed by satellite altimeters have focused primarily on the surface signature of such waves.
J. J.-M. Hirschi   +8 more
core   +2 more sources

Effects of the planetary waves on the MLT airglow [PDF]

open access: yesAnnales Geophysicae, 2017
The planetary-wave-induced airglow variability in the mesosphere and lower thermosphere (MLT) is investigated using simulations with the general circulation model (GCM) of Kyushu University.
F. Egito, H. Takahashi, Y. Miyoshi
doaj   +1 more source

Summary of the Third International Planetary Dunes Workshop: Remote Sensing and Image Analysis of Planetary Dunes, Flagstaff, Arizona, USA, June 12-15, 2012 [PDF]

open access: yes, 2013
The Third International Planetary Dunes Workshop took place in Flagstaff, AZ, USA during June 12-15, 2012. This meeting brought together a diverse group of researchers to discuss recent advances in terrestrial and planetary research on aeolian bedforms.
Yizhaq, Hezi   +24 more
core   +1 more source

Asymptotic Solutions for Equatorial Waves on Venus

open access: yesAtmosphere, 2023
The atmosphere of Venus exhibits equatorial planetary-scale waves that are suspected to play an important role in its complex atmospheric circulation.
Javier Peralta
doaj   +1 more source

More evidence for a planetary wave link with midlatitude E region coherent backscatter and sporadic E layers [PDF]

open access: yesAnnales Geophysicae, 2000
Measurements of midlatitude E region coherent backscatter obtained during four summers with SESCAT, a 50 MHz Doppler system operating in Crete, Greece, and concurrent ionosonde recordings from the same ionospheric volume obtained with a CADI for one ...
M. Voiculescu   +5 more
doaj   +1 more source

A Novel Method for the Fault Diagnosis of a Planetary Gearbox based on Residual Sidebands from Modulation Signal Bispectrum Analysis [PDF]

open access: yes, 2014
This paper presents a novel method for the fault diagnosis of planetary gearboxes based on an accurate estimation of residual sidebands using a modulation signal bispectrum (MSB).
Gu, Fengshou   +4 more
core   +3 more sources

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