Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 41 for “"Lower Stratosphere"”.
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Dynamical and radiative processes in the Upper Troposphere/Lower Stratosphere
… and processes in the Upper Troposphere/Lower Stratosphere (UTLS). This work involves exploring the interactions between radiation and dynamics which ultimately affect the destination of chemical constituents. A recently identified feature of the extratropical upper troposphere and lower …
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Ozone Chemistry in the Lower Stratosphere: Drivers, Trends, and Impacts
… anthropogenically driven chemical changes in the stratosphere by natural processes. It probes these questions on timescales that range from daily to decadal and on spatial scales ranging from a few kilometers to the global mean, and presents new results improving our understanding of both the …
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Vertical motion atlas for the lower stratosphere during the IGY.
Massachusetts Institute of Technology. Dept. of Meteorology. Thesis. 1965. M.S.
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Short meridional scale anomalies in the lower stratosphere and upper troposphere
<p>Short meridional scale anomalies (SMSA) in the lower stratospheric temperature field were recently discovered by Stanford and Short (1981) in the analyses of Microwave Sounding Unit (MSU) channel 4 data. Newman and Stanford (1983) further elucidated the properties of these anomalies, and their …
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The Downward Influence of Ozone Depletion in the Arctic Lower Stratosphere
Severe ozone depletion in the polar lower stratosphere has been linked to significant changes in tropospheric circulation patterns in the both hemispheres. Observed Southern Hemisphere circulation changes are easily reproduced in climate models and may be achieved by either increasing ozone …
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Global radiative heating with application to the dynamics of the lower stratosphere.
Thesis (Ph D.)--Massachusetts Institute of Technology, Dept. of Meteorology, 1970.
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Gravity Wave Characteristics in the Troposphere, Lower Stratosphere, and Mesopause at the South Pole
… the South Pole. Studies examine the troposphere, lower-stratosphere, and mesopause. It is found that wave strength in the lower atmosphere is always less energetic than at low- and midlatitude sites. In austral winter, wave amplitudes are about one-fourth their summertime values. Wave amplitudes …
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An Observational Investigation on Gravity Wave Characteristics and Propagation in the Lower Stratosphere and Mesopause
… in two regions of the middle atmosphere: the lower stratosphere using high-resolution radiosonde at South Pole and the mesopause region using OH airglow imager at Maui, Hawaii and Cerro Pachon, Chile. Wave characteristics at these regions are deduced and the seasonal variation of wave …
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An experimental study of the meridional temperature distribution and energy transformation in the lower stratosphere.
Massachusetts Institute of Technology. Dept. of Meteorology. Thesis. 1965. Ph.D.
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An Investigation of the Distribution of Ozone-depleting Substances in the Upper Troposphere and Lower Stratosphere
… the concentrations of these tracers in the lower stratosphere, particularly in the Northern Hemisphere winter and spring seasons. The three mixing barriers investigated, namely the polar vortex, the extratropical tropopause, and the tropical pipe, show that there are inconsistencies between …
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The Isotopic Composition of Water Vapor in the Upper Troposphere/Lower Stratosphere Region : Modeling, Analysis and Sampling
… of water vapor in the upper troposphere/lower stratosphere:} Exact knowledge about the isotopic composition of water vapor in the tropopause region and the stratosphere provides important information for the understanding of atmospheric transport and photochemistry. The presented thesis …
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An analytic examination of the effect of the stratosphere on surface climate through the method of piecewise potential vorticity inversion
… study was performed to examine the effect of the stratosphere on the surface of the earth. The method of piecewise potential vorticity inversion was employed in the diagnosis of the magnitude of and dynamics behind the stratosphere-surface link in both the transient and stationary cases. The …
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Age of air and the circulation of the stratosphere
The circulation of air in the stratosphere is important for the distribution of radiatively important trace gases, such as ozone and water vapor, and other chemical species, including ozone-depleting chlorofluorocarbons. Age of air in the stratosphere is an idealized tracer with unique mathematical …
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Age of air and the circulation of the stratosphere
The circulation of air in the stratosphere is important for the distribution of radiatively-important trace gases, such as ozone and water vapor, and other chemical species, including ozone-depleting chlorofluorocarbons. Age of air in the stratosphere is an idealized tracer with unique mathematical …
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The effects of volcanic aerosols on mid-latitude ozone recovery
… local tropopause and approximately 70mbar in the lower stratosphere. This underestimation is corrected and the resulting change in the ozone column is compared to the initial model output with no volcanic aerosols. Using the correct aerosol values, it is shown that ozone loss in the lower …
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Response to stratospheric forcing and its dependence on the state of the troposphere
There is increasing evidence that changes in the stratosphere can have an impact on the surface. While observational results show a surface response of about 0.5 - 1 m/s, modeling studies can show a signal two times and in a particular extreme, four to eight times larger. In this thesis, an …
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On the mechanism of the large-scale seasonally varying upwelling in the region of the tropical tropopause
… tropopause, one of the principal components of stratosphere-troposphere mass exchange. The global-scale mean meridional circulation in the lower stratosphere and the upward branch of the tropospheric Hadley circulation which form the two interrelated parts of atmospheric dynamics in the region …
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Limb scatter measurements of high altitude cloud distributions
… processes within the upper troposphere and lower stratosphere. Cirrus clouds occur at high altitude around the tropopause level and, despite their thin appearance and low optical thickness, they contribute to the radiative balance of the atmosphere. The processes in this region of the …
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Concentration of ozone in surface air over greater Boston
… ozone had arrived in the troposphere from the lower stratosphere. The concentration of ozone during the spring and early summer showed a much greater variability from day to day than was exhibited during the fall and winter months.
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Post-combustion emissions control for aero-gas turbine engines
… higher sensitivity of the upper troposphere and lower stratosphere. In the aviation industry, efforts to increase the efficiency of propulsion systems are giving rise to higher overall pressure ratios which results in higher NO[subscript x] emissions due to increased combustion temperatures. This …
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