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 87 for “"General Circulation Models"”.
-
Adaptive error estimation in linearized ocean general circulation models
… adaptive error estimation with low-dimensional models. We then apply the MT method in the North Pacific (5°-60° N, 132°-252° E) to TOPEX/POSEIDON sea level anomaly data, acoustic tomography data from the ATOC project, and the MIT General Circulation Model (GCM). A reduced state linear model that …
-
Adaptive error estimation in linearized ocean general circulation models
… adaptive error estimation with low-dimensional models. We then apply the MT method in the North Pacific (5°-60° N, 132°-252° E) to TOPEX/POSEIDON sea level anomaly data, acoustic tomography data from the ATOC project, and the MIT General Circulation Model (GCM). A reduced state linear model that …
-
The representation of cloud cover in atmospheric general circulation models
… one of the most crucial and uncertain aspects in General Circulation Models (GCMs) of the atmosphere, which are used for both Numerical Weather Prediction and the simulation of climate. It is therefore important to constantly monitor and improve the performance of cloud parametrizations in those …
-
The Role of diapycnal mixing in coupled atmosphere-ocean general circulation models
… important role in the meridional overturning<br/>circulation (MOC). Previous idealised experiments and simplified theory suggest that the strength of<br/>the MOC and the ocean heat transport scale with the v. This study investigates the dependence of<br/>the MOC and other parameters on v using …
-
Tracer water transport and subgrid precipitation variation within atmospheric general circulation models
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1988.
-
Development of a correction approach for future precipitation changes simulated by General Circulation Models
… bridge the gap between the coarse resolution of General Circulation Models (GCMs) and the higher-resolutions at which information is required by the majority of end users. However, the skill of GCM precipitation, particularly in simulating temporal variability, is not fully understood and …
-
Landsurface hydrology parameterization for atmospheric general circulation models : inclusion of subgrid scale spatial variability and screening with a simple climate model
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1990.
-
Mapping exoplanet clouds and albedo from phase curves and spectra
This thesis uses planetary albedo models to investigate variations in visible wavelength phase curves of exoplanets. We improve upon existing exoplanet giant planet albedo models and incorporate exoplanet general circulation models to analyze the composition and occurrence of clouds on tidally …
-
Catchment Scale Downscaling of Hydroclimatic Variables from General Circulation Model Outputs
… considered the dominant cause of climate change. General Circulation Models (GCMs) are used for the projection of climate into future, accounting for the GHG concentrations. However, the coarse spatial resolution of GCM outputs does not permit their direct use in catchment scale studies. Therefore …
-
Quantifying uncertainties and trends in the climate change trajectory
… techniques that combine observations and Earth models aimed at informing adaptation and mitigation policies. In the first chapter, the drivers, timing, and impacts of aridity change over the 21st century are assessed using an ensemble of general circulation models (GCMs) together with population …
-
FLOOD PROJECTION AND ANALYSIS THROUGH STOCHASTIC DOWNSCALING
Due to limitations in the General Circulation Models and Regional Climate Models, high resolution rainfall projections are not available. To this end, this study applies a novel stochastic downscaling method that was originally developed for rainfall nowcasting using radar data. In this study, the …
-
STATISTICAL MODELLING AND ANALYSIS FOR REGIONAL CLIMATE CHANGE
General circulation models (GCMs) are often used to inform climate change information, however, due to their coarse spatial resolutions, downscaling approaches are often relied to transit the coarser-scale GCM outputs to higher resolutions. Multivariate multisite weather generators (MMWGs) are …
-
Development of DRAINMOD-based VBA model for evaluating drainage system response
… in Illinois. Climate model projections from two general circulation models (GCMs), namely CCSM4 (Community Climate System Model) and MIROC5 (Model for Interdisciplinary Research on Climate), were used to create the climatological database for the VBA model. Case studies were developed with the …
-
Evaluating the Time of Emergence of Heat Waves using Different Definitions
… Using daily resolution of 10 CMIP6 era General Circulation Models forced by the SSP2-4.5 warming scenario, we evaluate the frequency of two definitions presented by the Intergovernmental Panel on Climate Change (IPCC) of heat waves in a reference period and in the future climate to …
-
It will rain if god wills it : local perceptions of climate change in the Futa Tooro of northern Senegal
… and rainfall variability predicted by General Circulation Models (GCM) threaten Sahel livelihoods by exacerbating aridity and existing environmental, political, and economic challenges. In addition to the broader issues of poverty and environmental degradation, lack of awareness of the …
-
The Reversibility/irreversibility of the Thermohaline Circulation After Its Shutdown: Simulations From a Hierarchy of Climate Models
The thermohaline circulation (THC) in the North Atlantic plays a vital role in explaining past abrupt climate changes and in maintaining the current climate. Its remarkable nonlinear dynamics, first demonstrated by Stommel, has been supported by different types of models. This has led to concern …
-
Weighted ensemble analysis of extreme precipitation under climate change
… are calculated from 13 statistical downscaling general circulation models under 3 CMIP3 emission scenarios: A1B, A2 and B1, as well as from 17 stations in NCDC and CCPN rain gage network. Then precipitation events of different recurrence intervals are calculated through regional frequency …
-
Sensitivity of climate change to diapycnal diffusivity in the ocean
… the least known parameters in cur- rent climate models. Measurements of this diffusivity are sparse and insufficient for compiling a global map. Inferences from inverse methods and energy budget calculations suggests as much as a factor of 5 difference in the global mean value of the diapycnal …
-
Incorporating Climate Sensitivity for Southern Pine Species into the Forest Vegetation Simulator
… and regression based Random Forest models were developed for presence-absence and abundance data, respectively. Model and diagnostics such as receiver operating curves (ROC) and variable importance plots were examined to assess model performance. Presence-absence classification …
-
Low Flow Variations in Source Water Supply for the Occoquan Reservoir System Based on a 100-Year Climate Forecast
… estimates of future supply through the use of general circulation models (GCMs). GCMs can be used to predict changes in local weather over the next century. Using GCM data as input to a hydrologic model of local water supplies, water supply managers can assess and be better prepared for the …
Page 1 of 5