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 27 for “"Orography"”.
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Estimating the effects of orography on precipitation levels in the Ibrahim River Basin, Lebanon
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2001.
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The influence of orography on an East Coast storm, as simulated by the NCAR GCM
Thesis. 1978. M.S.--Massachusetts Institute of Technology. Dept. of Meteorology.
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SIRIO : Integrated Forest Firesmonitoring, detection and decision supportsystem with low cost commercial sensorssuited for complex orography
… algorithm able to geo-reference complex orography regions using fixed ground station images. Besides, it does not need the collection of Ground Control Points, which is a very hard task in complex orography environments. In order to make a user oriented product and to help the operator …
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The Effects of Diabatic Heating on Storm Track Dynamics
… waves. The model is forced by realistic orography and diabatic processes including radiative relaxation, surface heating and condensational heating. Time-mean analyses of the statistically equilibrated eddy ensemble includes time-mean statistics, global spectral energetics, local …
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Mesoscale convective complexes over southern Africa
… factors, including geographic position, regional orography and local sea surface temperatures, ensures that subtropical southern Africa experiences considerable spatial and temporal variability in rainfall and is prone to both frequent flooding and drought events.
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Atmospheric Predictability in the Presence of Tropical Forcing
… experiments including and excluding midlatitude orography.
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The Steady-State Planetary Wave Response to Wave-Coupled Orographic Lower Boundary Forcing and Diabatic Heating in The Northern Hemisphere
… state and forced by the Northern Hemisphere orography and a wintertime calculated diabatic heating.
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The circulation and thermal structure of False Bay: a process-oriented numerical modelling and observational study
… (Roberts, 2005). Owing to the surrounding steep orography and its position, the meteorology of the False Bay region is also complex, having wind con-ditions that are unique when compared to other regions of South Africa (Jury, 1991). It is under these special conditions that the circulation of …
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Land surface and orographic controls on precipitation patterns in the Sierra Madre Occidental and Western Ghats
… of land surface and meteorological fields, the orography in each case acts as the primary regulator of heat and moisture in monsoonal fl ows. We use the recently developed Land Information System (LIS) to generate realistic land surface conditions to use in sensitivity tests with the Weather …
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Air pollution modelling over complex topography
… profiles of turbulent diffusivity on complex orography has been faced. Both a local approach and a global one (suitable for compact valleys) for the estimate of eddy diffusivity in valley have been investigated. The first one has been adopted in the lagrangian problem previously developed. …
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Impact of Wind Driven Variability on Sea Surface Temperature and Ocean Colour in False Bay
… variability in the wind fields driven by the orography. Analyses of the SST and ocean colour imagery show that wind shadows are generally associated with warmer surface waters and higher Chl-a. In contrast, regions of enhanced wind speeds show colder surface waters and decreased chlorophyll …
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Investigation of tropospheric arctic aerosol and mixed-phase clouds using airborne lidar technique
… allowed studying the effects of the Spitsbergens orography on the aerosol load in the Planetary Boundary Layer. With respect to the cloud studies a new methodology of alternated remote AMALi measurements with the airborne in-situ cloud optical and microphysical parameters measurements was proved …
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MECHANISMS FOR THE EXISTENCE OF DIAGONAL SOUTHERN HEMISPHERE CONVERGENCE ZONES
… diagonal orientation. Continental configuration, orography and absolute Sea Surface Temperatures (SST) do not have a significant influence. The key boundary condition is the zonally asymmetric component of the SST distribution. This leads to a strong subtropical anticyclone over the southeast …
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Extreme rainfall events over the Pongola-Mtamvuna Water Management Area of South Africa
… both spatially and temporally, due to regional orography, geographic position, and local sea-surface temperatures. Extreme weather conditions such as droughts and floods are not uncommon and can result in both positive and negative socio-economic impacts. The Pongola-Mtamvuna Water Management …
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Assessment of High-Resolution Simulation in Reproducing Surface Wind over Alps
… limited grid resolution in resolving the real orography. Surface wind on peaks is well simulated in summer when the PBL (Planetary Boundary Layer) is thick, so that the SYNOP observation stations and the corresponding grid pixels are within the PBL more often. Wind speed and daily wind speed …
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On the maintenance of blocking anticyclones in a general circulation model
… the troposphere and its pattern over severe orography is closely related to the underlying topography. Above the surface layer, the horizontal advection of time-mean absolute vorticity by the mean wind mainly balances the divergence term with the net effect of the time-mean vorticity forcing …
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Thermally generated convection and precipitation over volcanoes: Numerical modelling of flow over Montserrat
Atmospheric flow over orography is a classic research area, while the atmospheric response to surface heating has become a focus more recently in the context of solar heating and forest fires. Here, for the first time, these forcing mechanisms are superposed to examine atmospheric flow over a …
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Wind-driven upwelling on the Western Agulhas Bank: a study using ERA5 and WASA3 winds
… the WAB. WASA3 is shown to capture stronger orography-induced wind stress curl which drives the locations of upwelling cells and contributes 67.23% to the total upwelling velocity observed at Cape Hangklip in January, just more than double the contribution of alongshore wind stress driven …
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SURFACE AND AEROSOL EFFECTS ON THE SOUTH ASIAN MONSOON HYDROCLIMATE
… role in the development of the low. Regional orography and monsoon summertime deep-convection over the Bay of Bengal, with its upstream descent to the west and related northerlies, contribute to the strengthening of the low, indicating a monsoon modulation on desert processes, including dust …
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