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Now showing items 11-20 of 43
The biogeochemistry of lipid derived infochemical signals in the ocean
(Massachusetts Institute of Technology, 2016)
The role of oxylipins in ocean biogeochemistry was investigated using microcosm amendment experiments, environmental lipidomics, and culture based studies. Oxylipins are a bioactive class of secondary metabolites produced ...
The mineralogy and chemistry of modern shallow-water and deep-sea corals
(Massachusetts Institute of Technology, 2019)
The architecture of coral reef ecosystems is composed of coral skeletons built from the mineral aragonite (CaCO3). Coral reefs are currently being threatened by ocean acidification (OA), which may lower calcification rates, ...
A modeling study of the marine biogeochemistry, plankton dynamics, and carbon cycle on the continental shelf off the West Antarctic Peninsula
(Massachusetts Institute of Technology, 2019)
Over the past several decades, the West Antarctic Peninsula (WAP) has undergone physical and ecological changes at a rapid pace, with warming surface ocean and a sharp decrease in the duration of the sea ice season. The ...
Capturing dynamics of inorganic carbon fluxes from diurnal to decadal timescales
(Massachusetts Institute of Technology, 2017)
The marine carbon cycle plays an important role in regulating Earth's climate. The vastness of the open ocean and the large variability in the coastal ocean provide obstacles to accurately quantify storage and transport ...
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 ...
Mechanical and geological controls on the long-term evolution of normal faults
(Massachusetts Institute of Technology, 2015)
This thesis investigates the long-term evolution of rift-bounding normal faults. To first order, the observed diversity of extensional tectonic styles reflects differences in the maximum offset that can be accommodated on ...
Physics of diurnal warm layers : turbulence, internal waves, and lateral mixing
(Massachusetts Institute of Technology, 2017)
The daily heating of the ocean by the sun can create a stably stratified near-surface layer when the winds are slight and solar insolation is strong. This type of shallow stable layer is called a Diurnal Warm Layer (DWL). ...
Hydrodynamic and morphodynamic responses to surfzone seafloor perturbations
(Massachusetts Institute of Technology, 2016)
Holes and channels were excavated in the surf zone on an ocean beach near Duck, NC, and observations of the subsequent evolution of waves, currents, and the modified seafloor were used to investigate nearshore dynamics. ...
Dynamics of Greenland's glacial fjords
(Massachusetts Institute of Technology, 2016)
Glacial fjords form conduits between glaciers of the Greenland Ice Sheet and the North Atlantic. They are the gateways for importing oceanic heat to melt ice and for exporting meltwater into the ocean. Submarine melting ...
Temporal variability in chemical cycling of the subterranean estuary and associated chemical loading to the coastal ocean
(Massachusetts Institute of Technology, 2014)
At the land-ocean interface, terrestrial groundwater interacts with seawater to form a subterranean estuary, which can play host to dynamic biogeochemical cycling of nutrients, trace metals and radionuclides. This chemically ...