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.
Results
Showing 1 to 20 of 94 for “"Cloud Cover"”.
-
The representation of cloud cover in atmospheric general circulation models
… of improvements made in the representation of clouds in the global forecast model of the European Centre of Medium-Range Weather Fore- casts (ECMWF). Cloud parametrization has long been identified as one of the most crucial and uncertain aspects in General Circulation Models (GCMs) of the …
-
The diurnal cycle of cloud cover over southern and central Africa
… of the temporal and spatial distribution of clouds over southern and central Africa is poor and the regional processes governing cloud occurrence is only weakly understood. This study seeks to improve the current understanding of cloud diurnal variability over this region by providing a …
-
Stochastic Simulation of Hourly Rainfall, Total Cloud Cover, and Solar Radiation in Canadian Stations
… designed for simulating the hourly variations of cloud cover, solar radiation, and rainfall at various Canadian stations. The calibration of these models was carried out individually for 279 rainfall stations, 132 total cloud cover stations, and 564 solar radiation stations, which are …
-
An Investigation of the Relationship Between Low Cloud Cover And Lower Tropospheric Stability Using MISR
Marine boundary layer clouds account for a significant amount of uncertainty in future climate change projections from general circulation models (GCMs). To reduce the uncertainty of the role of clouds in GCMs, improved cloud parameterizations and evaluations of these parameterizations are often …
-
An analysis of zonal mean atmospheric angular momentum and high cloud cover : periodicities, time-latitude structure, and cross correlations
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth, Atmosphere and Planetary Sciences, 1987.
-
DETERMINATION OF STANDARD AND FIELD METABOLIC RATES IN TWO GREAT LAKES INVADING FISH SPECIES: ROUND GOBY (NEOGOBIUS MELANOSTOMUS) AND TUBENOSE GOBY (PROTERORHINUS SEMILUNARIS)
… dawn chorus start times and moon brightness, cloud cover, precipitation, ambient temperature, and artificial light exposure in a community of north temperate birds. I found that birds begin their dawn choruses significantly earlier with increasing moon brightness and ambient temperature, and …
-
Factors Controlling the Extent and Location of Cumulus Convection over the Sierras de Córdoba
… Sierras de Córdoba (SDC) of Argentina during the Cloud, Aerosol, and Complex Terrain Interactions (CACTI) field campaign. While it is well understood that mountains are effective at producing cloud cover via thermal and mechanical lifting of the air to saturation, it is less well understood what …
-
A numerical study of cropland-atmosphere feedbacks by incorporating a crop growth module in the WRF model
… and latent heat leading to a change in the cloud cover and consequently changing incoming shortwave radiation, air temperature and precipitation. An increase in cloud cover reduces incoming shortwave radiation and hence photosynthesis, exerting a negative feedback. However, an increase in …
-
Characterization of Pyranometer Thermal Offset and Correction of Historiacal Data
… Infrared Pyrgeometer (PIR) or the fraction of cloud cover in the sky. The use of thermistors is a very reliable method to estimate and correct the thermal offset. The relationships between the offset and the IR output and between the offset and the cloud cover fraction provide good estimates of …
-
Vision-Based Solar Forecasting with Deep Learning
… spatio-temporal variability induced by the cloud cover dynamics causes a large uncertainty in solar power supply, limiting its contribution to the energy mix. The diverse solutions developed to increase the reliability of solar energy, including improved storage systems or demand …
-
The influence of longwave cloud-top cooling on marine stratocumulus cloud transitions
… of American Monsoon Systems (VAMOS) Ocean–Cloud–Atmosphere–Land Study Regional Experiment (VOCALS-REx) as the initial conditions. In addition to the control simulation, 4 sensitivity analyses are conducted by varying the longwave radiative flux (ΔFn) across the boundary layer, thereby …
-
Assessing impact of the sulfate aerosol first indirect effect on tropical cyclone activity
… the first AIE (aerosol enhancement of cloud reflectivity) through parameterization of cloud droplet number, radius, and optical depth. Cloud droplet number is parameterized using an empirical scheme, while the radius is determined from cloud liquid water content and number concentration …
-
Data Assimilation and Applications in Forecasting
… We use the EnKF as part of a system to forecast cloud cover. Cloud cover forecasts are useful when forecasting solar power generation because clouds are the primary driver of reducing irradiance and therefore solar power generation. Our method uses satellite images, optical flow, and numerical …
-
Estimation de la superficie du couvert nival à partir d'une combinaison des données de télédétection MODIS et AMSR-E dans un contexte de prévision des crues printanières au Québec
Snow cover estimation is a principal source of error for spring streamflow simulations in Québec, Canada. Optical and near infrared remote sensing can improve snow cover area (SCA) estimation due to high spatial resolution but is limited by cloud cover and incoming solar radiation. Passive …
-
Factors affecting the activity patterns of Myotis tricolor (Chiroptera: Vespertilionidae)
… recorded, as was the temperature, moon-phase, cloud cover, wind speed, rainfall and insect abundance. These data were used to calculate emergence time, number of foraging bouts and foraging duration for each reproductive period, which were then correlated with the environmental variables.
-
On the nature of the atmospheric cloud radiative effect and its impact on tropical convection
Tropical high clouds have been shown to converge radiant energy within the atmosphere. We term this phenomenon the Atmospheric Cloud Radiative Effect (ACRE). The addition of energy unequally in space and time has profound effects on tropical convection. In this thesis, we show that the extra …
-
Estimation of Primary Production and Carbon Flux in Antarctic Coastal Waters: A Modeling Study
… of new coefficient sets for power function-type cloud cover correction algorithms, which were found to be influenced by multiple reflections between the bottom of clouds and the surface. The coefficient sets indicate that the spectral effect of clouds on the properties of the surface irradiance …
-
Convective cloud and rainfall processes over the Maritime Continent : simulation and analysis of the diurnal cycle
… feedbacks and the role of cumulus clouds in mediating the diurnal cycle of rainfall. Three key contributions are made to the development of RegCM3-IBIS. Two pieces of work relate directly to the formation and dissipation of convective clouds: a new representation of convective cloud …
-
Developing a solar resource map for a stored solar cooker
… the ambient conditions (solar radiation, percent cloud cover, temperature, and wind speed). Solar resource maps can quantify the global potential for solar energy use, but existing maps do not take storage aspects into account. Such a global resource map can be used to identify where the cookers …
-
Environmental predictors of Carcharodon carcharias presence at two popular beaches in False Bay, South Africa using acoustic telemetry
… that influence water visibility, including cloud cover, wind speed and ambient light levels. In this study, I use passive acoustic telemetry on 56 tagged white sharks to determine whether the same or other environmental variables explain variation in white shark presence at the same beaches. …
Page 1 of 5