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 56 for “"Atmospheric model"”.
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Design of a nonhydrostatic atmospheric model based on a generalized vertical coordinate
… has particular advantages in the numerical modeling of weather and climate. These include the elimination of the vertical velocity in adiabatic flow, which simplifies the motion to a two-dimensional problem and greatly reduces the numerical errors associated with vertical advection. Vertical …
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A numerical method for calculating occultation light curves from an arbitrary atmospheric model
… Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1996.
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Coupling a biosphere-atmosphere transfer scheme with a Mesoscale atmospheric model : a case study in deforestation
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1999.
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Barotropic or baroclinic instability: which is dominant in the unpredictability of a 28-variable atmospheric model?
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Meteorology, 1973.
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Nonlinear equilibration of baroclinic eddies : the role of boundary layer processes and seasonal forcing
… [beta] plane multilevel quasi-geostrophic (QG) model with an interactive stratification and a simplified parameterization of atmospheric boundary layer physics is used as the atmospheric model in this study. Comparisons between experiments with the modified QG model and the traditional QG model …
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A model study of the interannual variability of Tanzanian rainfall
The ability of the Hadley Centre Atmospheric Model version 3 (HadAM3) to capturerainfall variability patterns over Eastern Africa and the western tropical Indian Oceanduring the rainy seasons (October to December (OND) and March to May (MAM)) isassessed against data derived from National Centre for …
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Satellite-based estimates of net radiation and modeling the role of topography and vegetation on inter-annual hydro-climatology
… the world is a crucial gap in understanding and modeling impacts of climate change related to hydrologic cycle. The Surface Radiation Budget (SRB) is an important component in the study of land surface processes. Existing SRB retrieval algorithms generally suffer from two major shortcomings: …
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Investigation of refraction effects for small GPS networks
… on short baselines. Furthermore, a standard atmospheric model shows an improvement over the Marini model to account for tropospheric refraction.
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Antarctic sea-ice extent, Southern hemisphere circulation and South African rainfall
The study examines the response of an atmospheric general circulation model (OCM) to a reduction in Antarctic sea-ice extent during summer and winter, with emphasis on non-polar and southern African climates. Following an evaluation of the OCM, the control and perturbation simulations are analysed. …
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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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Onboard distributed replanning for crosslinked small satellite constellations
… high-performance schedules are enabled. An atmospheric model is integrated to provide the SPRINT scenarios. Results are presented for performance of the onboard replanning system. Given arbitrary activity failures, improvement, by means of reduction of the penalty, of 6 to 10 times the …
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Improving wind-based upwelling estimates off the west coasts of North and South America
… 2001 using geostrophically derived winds, model-derived winds from the U.S. Navy's global atmospheric (NOGAPS) model, and QuikSCAT satellite-measured winds. Satellite-measured winds, verified with 15 U.S. west coast buoys, were within 1.3 m s-1 and 26ﾰ RMS. Upwelling estimates derived from …
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Tools for Comparing ICON EUV Data with Different Ground Based and Space-based Proxies
… in the F region of the Ionosphere. Different atmospheric model including the IRI and TIEGCM, along with data obtained from ground-based observations and the ICON FUV instrument will be compared to the ionized oxygen profile, NmF2, HmF2 and various other parameters that are obtained from the …
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Natural variability in eastern tropical Pacific nitrous oxide emissions
… accounted for in assessments. Measurements of atmospheric concentrations from a selection of AGAGE stations around the Pacific Ocean were combined with back-trajectories calculated using the HYSPLIT4 atmospheric model, in order to study the relative importance of OMZs on Pacific N2O emissions. …
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Ensemble regression : using ensemble model output for atmospheric dynamics and prediction
… technique that uses ensemble statistics from atmospheric model output to make dynamical inferences and forecasts. ER defines a multivariate regression operator using ensemble forecasts and analyses to determine the most probable predict and perturbation associated with the prescribed predictor …
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Land conversion in Amazonia and Northern South America : influences on regional hydrology and ecosystem response
A numerical model of the terrestrial biosphere (Ecosystem Demography Model) is compbined with an atmospheric model (Brazilian Regional Atmospheric Modeling System) to investigate how land conversion in the Amazon and Northern South America have changed the hydrology of the region, and to see if …
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On the Atmospheric Saliency of Space Debris Reentries: Estimating Distribution, Lifetime and Radiative Forcing of Reentry-Ablated Alumina
… space objects are often removed from LEO via atmospheric reentry. During reentry, unshielded satellites and rocket bodies experience extreme heating loads and material ablation, depositing small metallic particles in atmosphere. These particles can remain suspended in the atmosphere and …
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Modellierung von Flächendatensätzen der Oberflächentemperatur, Strahlungsbilanz und Kaltluftproduktion in windschwachen Strahlungsnächten
… analysis based on data from a digital terrain model, while data on landuse were likewise considered. Based on a fuzzy -cluster algorithm approach, the correlation between the synthetic pattern derived from a DTM in combination with the landuse and the surface temperature of the satellite image …
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Impact of spatio-temporal variability of the Mascarene High on weather and climate over Southern Africa
… climate observations and the Conformal-Cubic Atmospheric Model (CCAM) for future projections. The Mascarene High is analysed using mean sea level pressure (MSLP) extracted from ECMWF ERA-interim monthly reanalysis data. The Mascarene High is also subjected to Principal Components Analysis, …
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Modelling impacts of climate change on hydrology of Latonyanda River Quaternary Catchment, Limpopo Province, South Africa
… The Soil and Water Assessment Tool (SWAT) model played a huge role in climate change impact analysis because it helped in improving the understanding of climate change impacts on hydrology as well as in determining mitigation measures. Arc-GIS 10.7 model with a compatible version of …
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