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Seismic and numerical constraints on the formation and evolution of ocean lithosphere
(Massachusetts Institute of Technology, 2019)
This thesis explicates aspects of the basic structure of oceanic lithosphere that are shaped by the processes that form the lithosphere. The strength of lithospheric plates relative to the underlying mantle enables the ...
Geophysical and geochemical constraints on submarine volcanic processes
(Massachusetts Institute of Technology, 2019)
Submarine volcanic systems form new oceanic crust, host unique chemosynthetic ecosystems, concentrate rare metals, and provide a conduit for chemical transfer from the Earth's interior to hydrosphere. Although our understanding ...
The production and fate of nitrogen species in deep-sea hydrothermal environments
(Massachusetts Institute of Technology, 2019)
Nitrogen (N) species in hydrothermal vent fluids serve as both a nutrient and energy source for the chemosynthetic ecosystems surrounding deep-sea vents. While numerous pathways have been identified in which N-species can ...
The Influence of heat transport on Arctic amplification
(Massachusetts Institute of Technology, 2019)
The Arctic surface air temperature has warmed nearly twice as much as the global mean since the mid-20th century. Arctic sea ice has also been declining rapidly in recent decades. There is still discussion about how much ...
Lagrangian dispersion and deformation in submesoscale flows
(Massachusetts Institute of Technology, 2019)
Submesoscale currents, with horizontal length scales of 1-20 km, are an important element of upper ocean dynamics. These currents play a crucial role in the horizontal and vertical redistribution of tracers, the cascade ...
Stratified and stirred : monsoon freshwater in the Bay of Bengal
(Massachusetts Institute of Technology, 2019)
Submesoscale ocean dynamics and instabilities, with characteristic scales 0.1-10 kin, can play a critical role in setting the ocean's surface boundary layer thickness and associated density stratification. Submesoscale ...
Storm signatures in coastal ponds and marshes over the late Holocene
(Massachusetts Institute of Technology, 2019)
Tropical cyclones pose a growing threat to coastal populations, especially as both populations and infrastructure are increasingly concentrated along the eastern coast of the United States. This thesis seeks to characterize ...
Dynamics and kinematics of an estuarine network
(Massachusetts Institute of Technology, 2019)
This thesis addresses the dynamics of estuarine networks, based on hydrographic observations in Newark Bay, a sub-estuarine network connected to the Hudson River estuary through New York Harbor. Estuarine networks differ ...
Reconstructing atmospheric changes in monsoon regions using eolian dust
(Massachusetts Institute of Technology, 2019)
Mineral dust is generated in continental interiors and exported by winds to ocean basins, providing a sedimentary archive which is one of the few direct indicators we have of atmospheric circulation in the past. This archive ...
Greenlandic ice archives of North Atlantic Common Era climate
(Massachusetts Institute of Technology, 2019)
The Common Era (A.D. 1- present) represents a crucial period for climatic studies, documenting the timespan over which human activities have become an increasingly domineering force in shaping Earth's landscape, climate, ...