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 60 for “"Atmospheric models."”.
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Forced oscillations in simple and binary gas atmospheric models
… osciliations decrease with height in the lower atmospheric regions. This implies the importance of heat conduction and viscosity as damping effects in these regions. It is proposed to extend the analysis of Parkyn by simplifying the geometry, treating one space dimension, so giving more …
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A comparison of spherical grids for numerical integration of atmospheric models,
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Meteorology, 1969.
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The Impact of Atmospheric Models on the Dynamics of Space Tether Systems
… the model behaves using newer and more accurate atmospheric models, namely, the Jacchia-Bowman 2008 model and the Drag Temperature Model 2013. We also investigate the effect of controlling the tether's libration energy under the three aforementioned atmospheric models.
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A method of applying the hydrodynamic and thermodynamic equations to atmospheric models
Thesis (Sc.D.) Massachusetts Institute of Technology. Dept. of Meteorology, 1948.
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Strongly Stable and Accurate Numerical Integration Schemes for Nonlinear Systems in Atmospheric Models
Nonlinearity accompanied with stiffness in atmospheric boundary layer physical parameterizations is a well-known concern in numerical weather prediction (NWP) models. Nonlinear diffusion equations, furthermore, are a class of equations which are extensively applicable in different fields of science …
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Impacts of Energy and Environmental Policies on Air Quality: Bridging Observational Data, Statistical, and Atmospheric Models
… - from statistical causal inference to atmospheric chemistry models - to assess the impacts of adopted energy and environmental policy on air quality, in support of decision making in energy, climate, and environmental governance. The first study estimates the impacts of energy policies …
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Area-average representation of land surface covers in large atmospheric models based on remotely sensed land surface cover data
… continental surfaces in global climate models. The problem it addressed was that current understanding of soil-vegetation-atmosphere interactions is considered only to be relevant to small plots of uniform vegetation with dimensions of the order 10-1000 m but, in order to provide …
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A Comparison of Atmospheric Models MODTRAN and 6S Based on Top of Atmosphere Reflectances of Natural Targets as Applied to Selected Mid-resolution Sensors
… the satellite sensor and the target on Earth. Atmospheric phenomena like scattering and absorption play significant roles in perturbing the radiation received by sensor. Hence, there is a need to mitigate or correct for these atmospheric effects. Various forms of Radiative Transfer Code (RTC) …
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Biomass burning emissions on regional-global scales
… formation. New EF should improve the input for atmospheric models along with regional-global BB emissions estimates. We present an up-to-date, comprehensive tabulation of EF for known pyrogenic species based on measurements made in smoke that has not yet undergone significant photochemical …
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Biomass burning emissions on regional-global scales
… formation. New EF should improve the input for atmospheric models along with regional-global BB emissions estimates. We present an up-to-date, comprehensive tabulation of EF for known pyrogenic species based on measurements made in smoke that has not yet undergone significant photochemical …
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A climatology of the stratospheric temperature using purple crow raman lidar
… in Detroit and Buffalo, as well as with atmospheric models, to determine the accuracy of the PCL measurements. An agreement to +1 K during summer months and ±2.5 K during the winter months is found. Comparison between PCL measurements and the CIRA atmospheric model show agreement of ±5 K …
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Early Plume Development and NOx Chemistry in LOx/H₂ and LOx/CH₄ Liquid Rocket Engines
… Existing rocket combustion and emission models do not account for altitude dependence on the formation of anthropogenic NOₓ from rocket engines, and has not been adequately evaluated. I accurately model rocket emissions’ altitude dependent chemical composition from 10 km to 40 km. …
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The private sector's capacity to manage climate risks and finance carbon neutral energy infrastructure
… concerning climate change from studies and atmospheric models. Based on this data, it modifies a framework widely used by practitioners in the finance field for purposes of evaluating financial risks in infrastructure projects. Using the modified risk assessment framework, the dissertation …
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Development & Testing of Novel Atmospheric Chemistry Technologies
<p>Atmospheric aerosols play an important role in global atmospheric chemistry and climate and have a detrimental impact on human health. Advancements in measurement technologies allow for better monitoring of atmospheric composition and dynamics, creating better predictive models and understanding …
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Accelerating Bayesian Computation in Earth Remote Sensing Problems
Earth atmospheric remote sensing is an inverse problem that fits surface and atmospheric models to imaging spectrometer data and is critical to the analysis of the composition and biodiversity of the Earth surface. Current methods for remote sensing generally involve retrieving a point estimate of …
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Development of a MeVVA based beryllium-7 plasma source
… isotope, partly explaining this discrepancy with atmospheric models. The short half-life of 7-Be requires us to replace the sample inside the ion source on a regular basis. Our design makes it possible to easily remove the cathode of the ion source from an ultra-high vacuum trap and exchange 7-Be …
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Exploring the microbe-mediated soil H² sink : a lab-based study of the physiology and related H² consumption of isolates from the Harvard Forest LTER
Atmospheric hydrogen (H²) is a secondary greenhouse gas that attenuates the removal of methane (CH⁴) from the atmosphere. The largest and least understood term in the H² biogeochemical cycle, microbe-mediated soil uptake, is responsible for about 80% of Earth's tropospheric H² sink. A recent …
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Moving Mesh Finite Element Method for Time Dependent Convection-Diffusion Problems
… These types of passive advection-diffusion models are used in atmospheric models with turbulent diffusion, so-called Benard-advection cells, and porous materials, along with many other areas of science and engineering. As molecular diffusivity decreases, interior and boundary layers …
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Stability of large-scale oceanic flows and the importance of non-local effects
… to the radiative damping used commonly in atmospheric models, except that it is applied to the ocean circulation in a closed basin and is meant to represent the large-scale thermal forcing acting on the oceans.
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