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 82 for “"deep convection"”.
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Topographic preconditioning of open ocean deep convection
Evidence of enhanced oceanic convection over Maud Rise in the Weddell Sea indicates that bottom topography may play a role in selecting the location and scale of deep convecting oceanic chimneys below large scale atmospheric negative buoyancy forcing. Topographic preconditioning of open ocean deep …
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Topographic preconditioning of open ocean deep convection
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1995.
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Causes of the interannual variability of deep convection
Deep water formation in the Labrador Sea and the Gulf of Lion, for example, results from convection. A cyclonic circulation leads to a doming of the isopycnals at its centre, where stratification is then completely eroded by high surface winter buoyancy loss. This thesis assesses the causes of the …
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Deep convection occurring above a stable planetary boundary layer
Thesis (Sc.D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric and Planetary Sciences, 1984.
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Interactions between Atmospheric Deep Convection and the Surrounding Environment
Atmospheric deep convection is a central player in Earth's climate, influencing the vertical distribution of energy and moisture in the atmosphere, modulating the hydrological cycle, and altering Earth's energy balance. However, many interactions between convection and other components of the …
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Latent heating and mixing due to entrainment in tropical deep convection
… (HTH) with evidence of diluted tropical deep convective cores. This study evaluates recent modifications to the HTH through Lagrangian trajectory analysis of deep convective cores in an idealized, high-resolution cloud-resolving model (CRM) simulation. A line of tropical convective cells …
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Stability and variability of open-ocean deep convection in deterministic and stochastic simple models
Die Tiefenkonvektion ist ein wesentlicher Bestandteil der Zirkulation im Nordatlantik. Sie beeinflusst den nordwärtigen Wärmetransport der thermohalinen Zirkulation. Ein Verständnis ihrer Stabilität und Variabilität ist daher nötig, um Klimaveränderungen im Bereich des Nordatlantiks einschätzen zu …
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The application of adaptive mesh modelling techniques to the study of open ocean deep convection
… water column. This process is called open ocean deep convection (OODC). The process of OODC occurs in stages. Initially, individual convective elements known as plumes form and cold, dense water descends from the surface. Over time these plumes build up to produce a well-mixed 'chimney' of cold …
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Tomographic observations of deep convection and the thermal evolution of the Greenland Sea Gyre, 1988-1989
… and by entrainment but in which the mixed-layer deepens only slowly to a depth of some 150-200m, a deep mixing phase (February-March) during which the surface mixed-layer deepens rapidly to approximately 1500m in the gyre center purely under the influence of local surface cooling, and a …
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Multi-decadal Dynamics of Southern Ocean Open-Ocean Polynyas and Deep Convection: Insights from Climate Models
Open-ocean deep convection and polynyas in the Southern Ocean play a fundamental role in regulating global climate through its influence on water mass formation, sea ice, and the large-scale overturning circulation. However, its variability, underlying mechanisms, and global impacts remain …
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Tomographic observations of deep convection and the thermal evolution of the Greeland Sea Gyre, 1988-1989
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1994.
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Toward assessing the effects of aerosols on deep convection: a numerical study using the WRF-Chemistry model
… of this study is to examine the sensitivity of deep convective precipitation modeled by the 2D WRF-Chem to varying aerosol number concentration and aerosol type. A systematic study has been performed regarding the effects of aerosols on parameters such as total precipitation, updraft/downdraft …
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The Role of Preexisting Airmass Boundaries in the Maintenance and Rotation of Deep Convection in a High -Cape, Low -Shear Environment
In the second phase of this research, numerical experiments were used to examine the open issues that emerged from the observational analysis. Simulations were conducted using an idealized cloud model with a horizontally heterogeneous initialization that included the dominant preexisting airmass …
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Antarctic Bottom Water in CMIP5 models : characteristics, formation, evolution
… or form AABW via the wrong process, open ocean deep convection in the subpolar gyres. Under climate change scenarios, open ocean deep convection is responsible for bringing the warming signal to the Southern Ocean abyss. It is then advected equatorwards by AABW transport. In turn, the decrease …
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Assessment of Convectively Generated Tropical Cirrus in Global Storm-Resolving Models
… budget. These cirrus are often associated with deep convection, which global climate models must parameterize and struggle to accurately simulate. By comparing high- resolution global models from the DYAMOND intercomparison that explicitly simulate deep convection to satellite observations, we …
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Investigation of the positive interaction between the primary and secondary circulation and the roles of different types of precipitation in tropical cyclone formation
… circulation, the secondary circulation, and convection for tropical cyclone development. Convection near the storm center feeds off moisture converging from large radii, and the release of latent heat concentrated near the circulation center then drives the overturning secondary circulation, …
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Simulating organization of convective cloud fields and interactions with the surface
… contribute to the transition between shallow and deep convection. The thermodynamic state of the boundary layer is forced by the amount of surface fluxes from below. Conversely, landscape patterns and land-cover heterogeneity may equally give rise to focused regions for deep convection triggering, …
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Modeling convection in the Greenland Sea
A detailed examination of the development of a deep convection event observed in the Greenland Sea in 1988-89 is carried out through a combination of modeling, scale estimates, and data analysis. We develop a prognostic one-dimensional mixed layer model which is coupled to a thermodynamic ice …
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Modeling convection in the Greenland Sea
A detailed examination of the development of a deep convection event observed in the Greenland Sea in 1988-89 is carried out through a combination of modeling, scale estimates, and data analysis. We develop a prognostic one-dimensional mixed layer model which is coupled to a thermodynamic ice …
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