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Showing 1 to 20 of 65 for “"mesosphere"”.
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Langmuir Probe Instrument Suite for Mesosphere Turbulence Experiment Mission
… on every sounding rocket investigation. Earth's mesosphere region (80-120 km) is a host of many dynamic phenomena such as the noctilucent clouds, breaking gravity waves, inversion layers, settlement of mesospheric smoke particles, etc. As such it is critical to have a comprehensive suite of …
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The Dynamic Stability of The Stratosphere and Mesosphere (Atmosphere)
… of zonal motions in the stratosphere and mesosphere. Two sets of calculations were performed.
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Measurements of energy and momentum in the mesosphere / D.J. Murphy
Bibliography : leaves 231-241
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Investigation of Mountain Waves in the Mesosphere over the Andes Mountains
<p>An image processing algorithm has been developed to analyze data from a NIR All-Sky Imager of OH airglow emission (from about 87 km altitude), located in the Andes, with the purpose of investigating the atmospheric gravity waves generated when low level wind blows over the high mountains …
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Remote Sensing of the Mesosphere Using the Jicamarca Incoherent-Scatter Radar
Made available in DSpace on 2014-12-12T20:54:10Z (GMT). No. of bitstreams: 1 7524387.pdf: 8450797 bytes, checksum: 0bec28cc661cc24643ef4e724614b8c6 (MD5) Previous issue date: 1975
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Wind and Wave Observations in the Mesosphere Using Coherent-Scatter Radar
Made available in DSpace on 2014-12-12T20:55:04Z (GMT). No. of bitstreams: 1 8009008.pdf: 5671029 bytes, checksum: 9d8b82def0ec1c5e04a071a9dc039f37 (MD5) Previous issue date: 1979
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Iron and sodium Doppler/temperature lidar studies of the upper mesosphere
Lidar measurements of mesospheric Fe were conducted at Urbana, Illinois, during four nights in late October 1989. The average Fe abundances, layer centroid heights and rms widths varied between 1.0-2.0 $\times$ 10$\sp{10}$ cm$\sp{-2}$, 89.0-90.5 km and 3.2-4.1 km, respectively. The peak densities …
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Investigation of a gravity wave ducting event in the upper mesosphere
… The effects are particularly strong in the mesosphere and lower thermosphere (MLT), where upward-propagating GWs tend to deposit momentum and energy flux via breaking, viscous dissipation, or other processes. The resulting net drag, heating, and cooling impact the global circulation of the …
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An Investigation of the Variability of Tides in the Upper Mesosphere (Meteor Radar)
A computer simulation of the Urbana, Illinois, meteor radar is performed to estimate the accuracy of the data analysis procedures in determining upper mesospheric tides. Various wind models such as planetary waves, gravity waves, and turbulence are tested and it is found that for reasonable values …
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Sodium lidar studies of the horizontal variability of gravity waves in the mesosphere
A data analysis technique for determining gravity wave intrinsic parameters is presented. The intrinsic parameters include the horizontal and vertical wavelengths, period, and wave propagation direction. The technique involves measuring the altitude variations of the wave induced density …
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A one-dimensional model for odd nitrogen in the stratosphere, mesosphere, and thermosphere.
Thesis. 1977. M.S.--Massachusetts Institute of Technology. Dept. of Meteorology.
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The Influence of Obliquely Propagating Monsoon Gravity Waves on the Polar Summer Mesosphere
… these waves can carry their momentum up to the mesosphere, following either a vertical or an oblique path. This upward and oblique propagation of gravity waves refers to the latitudinal propagation, away from their low-latitude tropospheric source and towards the polar summer mesosphere. Their …
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An Investigation of Turbulent Scatter From the Mesosphere as Observed by Coherent-Scatter Radar
Turbulent scatter from the mesosphere is observed using the Urbana coherent-scatter radar. The variation in signal-to-noise ratio as a function of time-of-day is examined. The origin of scattering regions is investigated by comparing the variations in scattered power and Doppler velocity. Nighttime …
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Electron Temperature Enhancement Effects on Plasma Irregularities Associated with Charged Dust in the Earth's Mesosphere
Recently, experimental observations have shown that Polar Mesospheric Summer Echoes PMSE may be modulated by radio wave heating the irregularity source region with a ground-based ionospheric heating facilities. It is clear from these past investigations that the temporal behavior of PMSE during …
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Long-range Propagation, Interaction, and Dissipation of Small-Scale Gravity Waves in the Mesosphere and Lower Thermosphere
… interaction of small-scale gravity waves in the Mesosphere and Lower Thermosphere (MLT) region. The research in this thesis is made up of three distinct studies which build upon each other. The first investigates the thermospheric dissipation of three gravity wave packets representing: (1) A …
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Development of a Small University Satellite for Performing a Global Survey of Gravity Waves in the Mesosphere
Understanding the dynamics and energy transfer within the atmosphere is important for a broad range of applications including communication, navigation, space travel, weather, and climate change. However, space weather research is currently limited by a lack of essential space measurements. Access …
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Study of Acoustic-Gravity Wave Spectra in the Atmosphere Using Mesosphere-Stratosphere- Troposphere Radar (Propagation, Universal Spectrum)
Current research indicates that acoustic-gravity waves can greatly influence the large-scale dynamics of the middle atmosphere. The morphology and structure of the atmospheric processes which cause this phenomenon can be better understood by the study of acoustic-gravity wave spectra. In order to …
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