Search Results - "Gurvich, A. S."

Reconstruction of internal gravity wave and turbulence parameters in the stratosphere using GOMOS scintillation measurements by Sofieva, V. F., Gurvich, A. S., Dalaudier, F., Kan, V.

“…Exploitation of stellar scintillation allows studying air density irregularities in the stratosphere. In this paper, we develop a methodology for…”
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Three-dimensional spectrum of temperature fluctuations in stably stratified atmosphere by Gurvich, A. S., Chunchuzov, I. P.

“…A phenomenological model is proposed for a 3-D spectrum of temperature inhomogeneities generated by internal waves in the atmosphere. This model is a…”
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Gravity wave spectra parameters in 2003 retrieved from stellar scintillation measurements by GOMOS by Sofieva, V. F., Gurvich, A. S., Dalaudier, F.

“…Using satellite measurements of stellar scintillation allows quantifying gravity waves (GW) in the stratosphere and their breaking into turbulence. GW and…”
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Parameters of the fine density structure in the stratosphere obtained from spacecraft observations of stellar scintillations by Gurvich, A. S., Chunchuzov, I. P.

“…Measurements of stellar scintillations caused by the atmosphere, conducted on board the space station Mir, are analyzed here. From scintillation spectra we…”
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Study of stratospheric air density irregularities based on two-wavelength observation of stellar scintillation by Global Ozone Monitoring by Occultation of Stars (GOMOS) on Envisat by Gurvich, A. S., Dalaudier, F., Sofieva, V. F.

“…The scintillations of stars observed through the Earth's atmosphere are generated by random irregularities of air density. We propose the qualitative theory…”
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Technical note: Scintillations of the double star α Cru observed by GOMOS/Envisat by Sofieva, V. F., Dalaudier, F., Kan, V., Gurvich, A. S.

“…In this paper, we discuss scintillation time-spectra of the double star α Cru, which were measured by the GOMOS/Envisat photometer. The components of α Cru are…”
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Lidar sounding of turbulence based on the backscatter enhancement effect by Gurvich, A. S.

“…A simple derivation of the equations describing the backscatter enhancement (BSE) effect of waves on small inhomogeneities in a randomly inhomogeneous medium…”
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Global analysis of scintillation variance: Indication of gravity wave breaking in the polar winter upper stratosphere by Sofieva, V. F., Kyrölä, E., Hassinen, S., Backman, L., Tamminen, J., Seppälä, A., Thölix, L., Gurvich, A. S., Kan, V., Dalaudier, F., Hauchecorne, A., Bertaux, J.-L., Fussen, D., Vanhellemont, F., Fanton d' Andon, O., Barrot, G., Mangin, A., Guirlet, M., Fehr, T., Snoeij, P., Saavedra, L., Koopman, R., Fraisse, R.

“…Stellar scintillations observed through the Earth atmosphere are caused by air density irregularities generated mainly by internal gravity waves and…”
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Lidar positioning of higher clear-air turbulence regions by Gurvich, A. S.

“…The possibility of lidar positioning of regions with higher clear-air turbulence (CAT) is shown. The turbulence is indicated by air density fluctuations…”
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Back-propagation and radio-holographic methods for investigation of sporadic ionospheric E-layers from Microlab-1 data by Gorbunov, M. E., Gurvich, A. S., Shmakov, A. V.

“…We investigate the capabilities of the back-propagation and radio-holographic methods for the interpretation of data of radio occultation sounding of…”
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Airborne lidar sounding of short-lived aerosol clusters by Gurvich, A. S., Kulikov, V. A.

“…Airborne lidar sounding of aerosol clusters by a laser beam sent forward in the aircraft flight direction is considered. Observability of the temporal…”
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Lidar sounding of the optical parameter of atmospheric turbulence by Gurvich, A. S., Fortus, M. I.

“…The operation of a lidar intended for clear air turbulence (CAT) positioning on the basis of the backscatter enhancement (BSE) effect is analyzed using a…”
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A heuristic model of three-dimensional spectra of temperature inhomogeneities in the stably stratified atmosphere by GURVICH, A. S

“…Many measurements have shown that the random temperature fields in the stably stratified atmosphere are not locally isotropic (LI). The local axial symmetry…”
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Mapping gravity waves and turbulence in the stratosphere using satellite measurements of stellar scintillation by Sofieva, V F, Gurvich, A S, Dalaudier, F

“…If stellar light passed through the atmosphere is measured on board a satellite with a high-frequency device, the stellar flux exhibits fluctuations that may…”
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Global distribution of CT2 at altitudes 30–50 km from space-borne observations of stellar scintillation by Gurvich, A. S., Sofieva, V. F., Dalaudier, F.

“…Locally isotropic turbulence in the stratosphere consists of isolated sporadic patches with random values of temperature structure characteristic CT2. Stellar…”
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Model of the three-dimensional spectrum of anisotropic temperature irregularities in a stably stratified atmosphere by Gurvich, A. S., Chunchuzov, I. P.

“…A phenomenological model is proposed for the three-dimensional (3 D ) spectrum of temperature irregularities generated by internal waves in the atmosphere…”
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Horizontal and oblique spectra of temperature fluctuations in a stably stratified troposphere by Gurvich, A. S., Kukharets, V. P.

“…The first experimental studies of the spatial oblique and vertical spectra of temperature fluctuations in a stably stratified troposphere at heights of 2 to 8…”
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Comparison between refraction angles measured in the Microlab-1 experiment and calculated on the basis of an atmospheric general circulation model by Gurvich, A S, Gorbunov, ME, Kornblueh, L

“…The differences between the refraction angles measured and calculated for the reanalyses of the European Centre for Medium-Range Weather Forecasts were…”
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Determination of parameters of the spectrum of internal waves in the stratosphere from space-based observations of strong stellar scintillation by Gurvich, A S, Vorob'ev, V V, Fedorova, O V

“…Observation of stars from a spacecraft through the Earth's atmosphere is a constituent part of remote sensing of the atmosphere. Recorded scintillation signals…”
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Strong scintillation spectra behind a phase screen containing large-scale anisotropic irregularities by Gurvich, A. S., Vorob’ev, V. V., Marakasov, D. A., Fedorova, O. V.

“…Using the approximation of an anisotropic statistically-homogeneous phase screen, we consider spectra of strong scintillations. Numerical calculations are made…”
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