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 141 for “"seasonal variability"”.
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Seasonal variability in the intermediate water of the eastern North Atlantic
Observational evidence of seasonal variability below the main thermocline in the eastern North Atlantic is described, and a theoretical model of oceanic response to seasonally varying windstress forcing is constructed to assist in the interpretation of the observations. The observations are …
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Seasonal variability in the intermediate water of the eastern North Atlantic
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1980.
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Edge analysis of seasonal variability in chlorophyll maps of the Black Sea
The use of remotely sensed oceanographic data would be greatly benefited by being able to detect circulation features automatically through edge detection. In the Black Sea, the use of edge detection to identify fronts can be used to study the effects of river input on circulation patterns and …
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Seasonal variability of sediment oxygen demand and biogeochemistry on the Namibian inner shelf
… (Chapman and Shannon, 1985) is thought to drive seasonal variability in sediment oxygen demand. New understanding of the system suggests that shelf hypoxia is driven by a remotely forced equatorial hypoxic boundary condition thought to trigger anaerobic remineralization and increased sediment …
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Tropical transport and the seasonal variability of the subtropical "edges" in the stratosphere
… may be considered isolated, the mechanisms and variability of this isolation, and the implications of tropical isolation for global-scale transport. We address some of these issues using three very different tools: a simple model of stratospheric transport, which allows us to investigate the …
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Intra-seasonal variability of Southern Ocean primary production: the role of storms and mesoscale turbulence
… of intense storms and meso to sub-mesoscale eddy variability has the potential to strongly impact the intraseasonal variability of the upper ocean environment where phytoplankton live. Yet, exactly how phytoplankton growth rates and its variability are impacted by the dominance of such features is …
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Near-inertial internal Poincare waves in Lake Michigan: Seasonal variability and effects on lateral dispersion and turbulent mixing
… of this dissertation is to investigate their seasonal variation and the potential roles on lateral dispersion and vertical mixing. ^ At this mid-lake location, the Poincaré wave is seen to describe more than 80% of the observed surface current variability for much of the year, with …
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Seasonal Variability of Heat and Mass Transport Process in the Upper Tropical Atlantic Ocean: A Numerical Model Study
… model was developed and used to illustrate the seasonal variability of heat and mass transports in the upper tropical Atlantic Ocean, associated with the seasonal movement of the Inter-Tropical Convergence Zone (ITCZ). The model ocean was forced by seasonally varying climatological wind and heat …
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Seasonal variability of phytoplankton photophysiology in the Southern Ocean: an analysis of uncertainties and the impact of assumptions
… productivity, but disentangling the drivers of variability in phytoplankton photophysiology remains challenging due to the complex and dynamic nature of the Southern Ocean environment. This two-part thesis addresses both methodological and ecological uncertainties using a multi-seasonal dataset …
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The meridional and seasonal variability of the carbonate system in the Southeast Atlantic sector of the Southern Ocean: SCALE 2019 Experiment
… data, distant areas like polar oceans remain seasonally undersampled. Consequently, there may be a significant gap in our understanding of biological implications of future ocean acidification (OA). This study seeks to examine the seawater state conditions of the carbonate system that are …
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Cloud Observations from the Mars Science Laboratory Mission: Seasonal Variability, Scattering Phase Function, and Validation of Optical Depths using Lidar Measurements of Terrestrial Cirrus Clouds
… including a detailed overview of the seasonality, opacity, spacing, and scattering properties of the clouds that appear in the observations. The cloud opacities were validated by testing the high cloud method by imaging high altitude cirrus clouds using a radiometrically calibrated …
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Intra- and Inter-Seasonal Variability of Supra-Glacial 1 Streams and Lakes over the West Greenland Ice Sheet 2 from High-Resolution Satellite Optical Data
… Surface water, known as supra-glacial water, is seasonally found in the ablation zone and feeds the en-glacial and sub-glacial hydrological environments of the ice sheet. The spatial distribution of surface streams is poorly understood and their temporal variability is (to our knowledge) unknown. …
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Variability of the polar stratospheric vortex and its impact on surface climate patterns
This thesis investigates various aspects of the variability of the stratospheric polar vortex and the effect of this variability on tropospheric weather and climate patterns on various timescales. In the first part of this work, an improved idealized model was developed to study the coupled …
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Current Ground Deformation Derived from GPS Observations near PBO Station AC 55 along the Yentna River, South of Denali National Park Reserve, Alaska
… separate regional ground motion associated with seasonal variability and postseismic deformation from the 2002, M 7.9 Denali earthquake. Time series of motion in the horizontal and a vertical component was plotted for the entire network spanning the observation period (2002-2014). GPS …
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Understanding the ocean carbon and sulfur cycles in the context of a variable ocean : a study of anthropogenic carbon storage and dimethylsulfide production in the Atlantic Ocean
… understanding of the impact of natural variability on carbon and sulfur cycling. Variability in ocean physics, specifically changes in vertical mixing, is shown to significantly impact both cycles. The impact of interannual variability on the detection and attribution of anthropogenic …
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Understanding the ocean carbon and sulfur cycles in the context of a variable ocean : a study of anthropogenic carbon storage and dimethylsulfide production in the Atlantic Ocean
… understanding of the impact of natural variability on carbon and sulfur cycling. Variability in ocean physics, specifically changes in vertical mixing, is shown to significantly impact both cycles. The impact of interannual variability on the detection and attribution of anthropogenic …
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Understanding the Role of Vegetation Dynamics and Anthropogenic induced Changes on the Terrestrial Water Cycle
… weather and climate extremes accurately. Seasonal variability in vegetation growth and human-driven land cover changes (LCC) can alter the biophysical properties of the land surface, which can in turn influence the water cycle. We quantified the impacts of seasonal variability in …
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Temporal variability in chemical cycling of the subterranean estuary and associated chemical loading to the coastal ocean
… aquifers and the coastal ocean. In this thesis, seasonal variability in chemical cycling and associated loading to the coastal ocean was observed in a monthly time series within the Waquoit Bay (MA, USA) subterranean estuary. The position of the aquifer mixing zone moved seaward with an increase …
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Temporal variability in chemical cycling of the subterranean estuary and associated chemical loading to the coastal ocean
… aquifers and the coastal ocean. In this thesis, seasonal variability in chemical cycling and associated loading to the coastal ocean was observed in a monthly time series within the Waquoit Bay (MA, USA) subterranean estuary. The position of the aquifer mixing zone moved seaward with an increase …
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