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Now showing items 31-40 of 71
The response of the Red Sea to a strong wind jet near the Tokar Gap in summer
(Massachusetts Institute of Technology, 2011)
Remote sensing and in situ observations are used to investigate the ocean response to the Tokar Wind Jet in the Red Sea. The wind jet blows down the pressure gradient through the Tokar Gap on the Sudanese coast, at about ...
Lipid biomarkers of coral stress : calibration and exploration
(Massachusetts Institute of Technology, 2011)
Corals are increasingly threatened by warming sea surface temperatures and other anthropogenic changes. The delicate symbiosis between corals and their algal endosymbionts (zooxanthellae) is easily disrupted by thermal ...
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 ...
Geomicrobiology of nitrogen in a coastal aquifer : isotopic and molecular methods to examine nitrification and denitrification in groundwater
(Massachusetts Institute of Technology, 2010)
Excess nitrogen input is deleterious to coastal waters, resulting in deterioration of the water quality, increases in harmful algal blooms and disease in commercial fish stocks. A significant portion of this nitrogen enters ...
The centennial and millennial variability of the IndoPacific warm pool and the Indonesian Throughflow
(Massachusetts Institute of Technology, 2012)
As the only low-latitude connection between ocean basins, the Indonesian Throughflow allows the direct transmission of heat and salinity between the Pacific and Indian Oceans. Despite its potential importance, the role of ...
Coral calcification : insights from inorganic experiments and coral responses to environmental variables
(Massachusetts Institute of Technology, 2010)
The mechanisms involved in the formation of coral skeletons are examined using a laboratory model for coral calcification and the growth of living corals under different environmental conditions. Abiogenic aragonite was ...
Insight into chemical, biological, and physical processes in coastal waters from dissolved oxygen and inert gas tracers
(Massachusetts Institute of Technology, 2017)
In this thesis, I use coastal measurements of dissolved O₂ and inert gases to provide insight into the chemical, biological, and physical processes that impact the oceanic cycles of carbon and dissolved gases. Dissolved ...
Coral biomineralization, climate proxies and the sensitivity of coral reefs to CO₂-driven climate
(Massachusetts Institute of Technology, 2017)
Scleractinian corals extract calcium (Ca²⁺) and carbonate (CO₃²⁻) ions from seawater to construct their calcium carbonate (CaCO₃) skeletons. Key to the coral biomineralization process is the active elevation of the CO₃²⁻ ...
Exploring the climate change refugia potential of equatorial Pacific coral reefs
(Massachusetts Institute of Technology, 2015)
Global climate models project a 21st century strengthening of the Pacific Equatorial Undercurrent (EUC). The consequent increase in topographic upwelling of cool waters onto equatorial coral reef islands would mitigate ...
Evolution of oceanic margins : rifting in the Gulf of California and sediment diapirism and mantle hydration during subduction
(Massachusetts Institute of Technology, 2013)
This thesis investigates three processes that control the evolution of oceanic margins. Chapter 2 presents seismic images of a ~2-km-thick evaporite body in Guaymas Basin, central Gulf of California. In rifts, evaporites ...