Výsledky vyhledávání - "R. A. Akmaev"

Akademický článek

Autor: H. Wang, J. P. Boyd, R. A. Akmaev

Publikováno v: Geoscientific Model Development, Vol 9, Iss 4, Pp 1477-1488 (2016)

Hough functions are the eigenfunctions of the Laplace tidal equation governing fluid motion on a rotating sphere with a resting basic state. Several numerical methods have been used in the past. In this paper, we compare two of those methods: normali

Externí odkaz: https://doaj.org/article/e68b54d14b6f4834adfeb22ef1b22e10

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Akademický článek

Emerging pattern of global change in the upper atmosphere and ionosphere

Autor: J. Laštovička, R. A. Akmaev, G. Beig, J. Bremer, J. T. Emmert, C. Jacobi, M. J. Jarvis, G. Nedoluha, Yu. I. Portnyagin, T. Ulich

Publikováno v: Annales Geophysicae, Vol 26, Pp 1255-1268 (2008)

In the upper atmosphere, greenhouse gases produce a cooling effect, instead of a warming effect. Increases in greenhouse gas concentrations are expected to induce substantial changes in the mesosphere, thermosphere, and ionosphere, including a the

Externí odkaz: https://doaj.org/article/efa75fcb64a34794bdfee88d475ccd6b

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Akademický článek

Cooling of the mesosphere and lower thermosphere due to doubling of CO2

Autor: R. A. Akmaev, V. I. Fomichev

Publikováno v: Annales Geophysicae, Vol 16, Pp 1501-1512 (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). The parameterization is applicable to calculations of heating rates above approximate

Externí odkaz: https://doaj.org/article/511e59e027ea4259a3459dd9a565e93b

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Akademický článek

SMLTM simulations of the diurnal tide: comparison with UARS observations

Autor: R. A. Akmaev, V. A. Yudin, D. A. Ortland

Publikováno v: Annales Geophysicae, Vol 15, Pp 1187-1197 (1997)

Wind and temperature observations in the mesosphere and lower thermosphere (MLT) from the Upper Atmosphere Research Satellite (UARS) reveal strong seasonal variations of tides, a dominant component of the MLT dynamics. Simulations with the Spectra

Externí odkaz: https://doaj.org/article/1cc27797c85a415e90aba7c3babce49c

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SMLTM simulations of the diurnal tide: comparison with UARS observations

Autor: V. A. Yudin, David A. Ortland, R. A. Akmaev

Publikováno v: Annales Geophysicae
Annales Geophysicae, European Geosciences Union, 1997, 15 (9), pp.1187-1197
Annales Geophysicae, Vol 15, Pp 1187-1197 (1997)
Annales Geophysicae, Vol 15, Iss 9, Pp 1187-1197 (0000)

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c56ad9dcb1975a20a8f76c5ee396d34c
https://www.ann-geophys.net/15/1187/1997/

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Sravnitel'noe izuchenie vliyaniyainsulinorezistentnosti na androgennuyuaktivnost' nadpochechnikov i yaichnikov u zhenshchinrannego reproduktivnogo vozrasta s sindromompolikistoza yaichnikov

Autor: D A Derkach, E N Andreeva, R I Akmaev, E A Karpova, A A Pishchulin

Publikováno v: Ожирение и метаболизм, Vol 7, Iss 2, Pp 29-35 (2010)

Резюме. Синдром поликистозных яичников (СПЯ) - заболевание, характеризующееся хронической ановуляцией, наличием клинических или биохим�

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7be20d578659d9409ef44ed42e5b1ae0
https://doi.org/10.14341/2071-8713-5206

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Using enthalpy as a prognostic variable in atmospheric modelling with variable composition

Autor: Hann-Ming Henry Juang, R. A. Akmaev

Publikováno v: Quarterly Journal of the Royal Meteorological Society. 134:2193-2197

Specific enthalpy emerges from a general form of the internal energy equation as a convenient prognostic thermodynamic variable for atmospheric modelling with variable composition, including models of moist air. This choice presents a general and fle

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0b8ec35cc7a1cafde34103f5199314d6
https://doi.org/10.1002/qj.345

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On the energetics of maximum-entropy temperature profiles

Autor: R. A. Akmaev

Publikováno v: Quarterly Journal of the Royal Meteorological Society. 134:187-197

The problem of determining a maximum-entropy state in an atmospheric column has different solutions depending on the constraints imposed. As was first shown by J. W. Gibbs, maximization of entropy in a thermally-isolated, i.e. energy-conserving, atmo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4e3fadf3f82e2f6b9c8a37058b5faaa8
https://doi.org/10.1002/qj.209

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Seasonal variations of the terdiurnal tide in the mesosphere and lower thermosphere: A model study

Autor: R. A. Akmaev

Publikováno v: Geophysical Research Letters. 28:3817-3820

Observations of the terdiurnal (8-hour) tidal wind oscillations in the mesosphere and lower thermosphere (MLT) reveal strong seasonal and latitudinal variations. The tidal amplitudes reach a maximum of about 15–20 m s−1 at midlatitudes in winter.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::425c66b43315f122ff424c464a460568
https://doi.org/10.1029/2001gl013002

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Simulation of large-scale dynamics in the mesosphere and lower thermosphere with the Doppler-spread parameterization of gravity waves: 2. Eddy mixing and the diurnal tide

Autor: R. A. Akmaev

Publikováno v: Journal of Geophysical Research: Atmospheres. 106:1205-1213

Turbulence is thought to be produced by gravity waves that become unstable in the upper atmosphere. Owing to a relatively short vertical wavelength of the solar diurnal tide, turbulent viscous-type mixing is expected to be particularly important for

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2ee9095ab50c254d0158c552be892c28
https://doi.org/10.1029/2000jd900519

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