Scientific goals of optical instruments of the National Heliogeophysical Complex
Solar-Terrestrial Physics, 2020 Studies of the upper atmosphere have to be performed using optical photometric and spectrometric means. Modern devices allow precise photometry of the glow of the night atmosphere — airglow — with high temporal spatial and spectral resolution.
Vasilyev R.V. +11 more
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Studying a Long-Lasting Meteor Trail from Stereo Images and Radar Data
Atmosphere, 2021 Unique observation of a long-lasting meteor trail of about half an hour duration is described. The trail resulted from a burning meteor from the Leonid storm flux in the middle latitudes over eastern Siberia.
Roman V. Vasilyev +6 more
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Atmosphere, 2019 The upper atmosphere of Mars is constantly perturbed by small-scale gravity waves propagating from below. As gravity waves strongly affect the large-scale dynamics and thermal state, constraining their statistical characteristics is of great importance ...
David Jesch +4 more
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Spectral characteristics of spring arctic mesosphere dynamics [PDF]
Annales Geophysicae, 1998 The spring of 1997 has represented a stable period of operation for the joint University of Tromsø / University of Saskatchewan MF radar, being between refurbishment and upgrades. We examine the horizontal winds from the February to June inclusive and
C. M. Hall, A. H. Manson, C. E. Meek
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A study into the effect of the diurnal tide on the structure of the background mesosphere and thermosphere using the new coupled middle atmosphere and thermosphere (CMAT) general circulation model [PDF]
Annales Geophysicae, 2002 A new coupled middle atmosphere and thermosphere general circulation model has been developed, and some first results are presented. An investigation into the effects of the diurnal tide upon the mean composition, dynamics and energetics was ...
M. J. Harris +4 more
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Gravity wave intensity and momentum fluxes in the mesosphere over Shigaraki, Japan (35°N, 136°E) during 1986-1997 [PDF]
Annales Geophysicae, 2000 Averaged seasonal variations of wind perturbation intensities and vertical flux of horizontal momentum produced by internal gravity waves (IGWs) with periods 0.2-1 h and 1-6 h are studied at the altitudes 65-80 km using the MU radar measurement data ...
N. M. Gavrilov +3 more
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Cooling of the mesosphere and lower thermosphere due to doubling of CO2 [PDF]
Annales Geophysicae, 1998 A new parameterization of infrared radiative transfer in the 15-μm CO2 band has been incorporated into the Spectral mesosphere/lower thermosphere model (SMLTM).
R. A. Akmaev, V. I. Fomichev
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Propagation Properties of Sunspots Umbral Oscillations in Horizontal and Vertical Directions
The Astrophysical Journal, 2023 We present a study on investigating the propagation characteristics of umbral oscillations in sunspots. In sunspot 1 (located in NOAA AR 12127) with four umbrae, the analysis shows that the oscillations in different umbrae are correlated.
Wei Wu +4 more
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Numerical modeling of solar wind influences on the dynamics of the high-latitude upper atmosphere [PDF]
Advances in Radio Science, 2012 Neutral thermospheric wind patterns at high latitudes obtained from cross-track acceleration measurements of the CHAMP satellite above both polar regions are used to deduce statistical neutral wind vorticity distributions and were analyzed in their ...
M. Förster +3 more
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Investigating the role of gravity waves in mesosphere and lower-thermosphere (MLT) inversions at low latitudes [PDF]
Annales GeophysicaeThe mesosphere and lower-thermosphere (MLT) transitional region, encompassing a height range of 60–100 km, is a distinct and highly turbulent zone within Earth's atmosphere.
C. Lingerew, U. J. P. Raju
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