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 219 for “"Mixed layer"”.
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Oceanic mixed layer entrainment zone dynamics
The Naval Postgraduate School mixed layer model is augmented to include an entrainment zone with finite thickness. The role of entrainment shear production of turbulent kinetic energy is investigated by comparing model results that include the new entrainment zone with observations at Ocean Weather …
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Land atmosphere interaction and atmospheric mixed layer height evolution
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1996.
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Arabian Sea mixed layer deepening during the monsoon : observations and dynamics
The unusual twice-yearly cycle of mixed layer deepening and cooling driven by the monsoon is analyzed using a recently collected (1994-95) dataset of concurrent local air-sea fluxes and upper ocean dynamics from the Arabian Sea. The winter northeast monsoon has moderate wind forcing and a strongly …
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Cloud effects on ocean mixed layer in the northeast Pacific Ocean.
… to examine the effects of clouds on the ocean mixed layer, both short-term and seasonal. It utilized data collected at Ocean Station Papa in the northeast Pacific. Two numerical modeling simulations were performed (i.e., with variable cloud and with variable precipitation). The results for the …
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Arabian Sea mixed layer deepening during the monsoon : observations and dynamics
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1997.
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Numerical Simulation of Thermohaline Convection in the Mixed Layer of the Ocean
… intradiumal heating and cooling cycle of the mixed layer of a tropical ocean is investigated through the use of a pseudo-two-dimensional numerical model. Particular emphasis is given to two-component diffusion resulting from dynamic instabilities in the water column. The conservation equations …
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A Coupled Bio-Optical and Mixed Layer Model for the Equatorial Pacific
<p>A one dimensional coupled bio-optical and mixed layer model is developed and applied to problems involving the role of phytoplankton-induced turbidity (PIT) on the vertical structure and heating of the upper ocean in the Equatorial Pacific Ocean. The bio-optical and mixed layer model for …
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The evolution of ocean fronts in the presence of mixed layer turbulence
Fronts, or regions with large horizontal density gradients, are common and important features of the upper ocean. On sufficiently large scales, the hydrostatic pressure gradient associated with the horizontal density gradient is often nearly balanced by a geostrophic (or thermal wind) …
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Meridional heat transport by wind-driven gyres in the oceanic mixed layer
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1989.
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Application of similarity theory to forecasting the mixed-layer depth of the ocean
… structure of the ocean, especially the uppermost mixed layer, greatly affects sonar ranges. In this paper, similarity theory is applied to the problem of forecasting the depth of the mixed layer during the warm season, assuming the controlling processes are secular, non-advective , and …
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Mixed Layer Dynamics Along the Seward Line in the Northern Gulf of Alaska
… while light is available in a relatively shallow layer in the upper ocean. In most productive parts of the world oceans, nutrients are brought to surface waters by upwelling. However, in the northern Gulf of Alaska, the winds are generally downwelling inducing and the mechanism(s) by which …
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Modelling turbulence and transport of buoyant material in the ocean surface mixed layer
The ocean mixed layer (OML) is a significant and dynamically active part of the ocean which plays an important role in climate variability. Here, atmospheric processes such as winds, heat fluxes or density differences drive the generation of small-scale, three-dimensional turbulence and mixing of …
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Mixed layer nitrogen cycling in the Southern Ocean: seasonality, kinetics, and biogeochemical implications
… of nitrogen (N) in the seasonally-varying mixed layer – including the production of ammonium and its subsequent removal via phytoplankton uptake and nitrification (i.e., the oxidation of ammonium to nitrite and then nitrate) – remains poorly understood. Following the “new production …
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Implications to underwater sound transmission of inhomogeneities in the mixed layer of the ocean
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Meteorology, 1962.
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A model of the temporal and spatial distribution of carbon monoxide in the mixed layer
… in [CO] both at the sea surface and in the upper layers of the water column down to 200 m. Published studies of this cycle have suggested that the dominant controlling processes are light-induced production, microbial CO consumption, surface degassing, and dilution due to entrainment of deeper …
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A model of the temporal and spatial distribution of carbon monoxide in the mixed layer
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1994.
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Simulation of the U.S. Great Plains low-level jet using spatially-coupled mixed layer models
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1999.
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Winter mixed-layer development in the central Irminger Sea : the effect of strong, intermittent wind events
… of the Greenland tip jet on the wintertime mixed-layer of the southwest Irminger Sea is investigated using in-situ moored profiler data and a variety of atmospheric data sets. The mixed-layer was observed to reach 400 m in the spring of 2003, and 300 m in the spring of 2004. Both of these …
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Single-column and mixed-layer model analysis of subtropical stratocumulus response mechanisms relevant to climate change
… using a range of models, from an idealized mixed-layer model (MLM) to a high-resolution large eddy simulation (LES). The aerosol indirect effect (AIE) for nondrizzling stratocumulus clouds is strongly dependent on an entrainment-sedimentation feedback that increases the entrainment …
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