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Now showing items 61-70 of 70
The entrainment and homogenization of tracers within the cyclonic gulf stream recirculation gyre
(Massachusetts Institute of Technology, 1987)
The various distributions of tracer associated with the Northern Recirculation Gyre of the Gulf Stream (NRG) are studied to try to obtain information about the flow. An advective-diffusive numerical model is implemented ...
Axial structure of fast spreading mid-ocean ridges : implications for overlapping spreading centers
(Massachusetts Institute of Technology, 1986)
The remineralization of marine organic matter by diverse biological and abiotic processes
(Massachusetts Institute of Technology, 2017)
While aerobic respiration is typically invoked as the dominant mass-balance sink for organic matter in the upper ocean, many other biological and abiotic processes can degrade particulate and dissolved substrates on globally ...
Antarctic glacial chronology : new constraints from surface exposure dating
(Massachusetts Institute of Technology, 2000)
The dynamics of oceanic transform faults : constraints from geophysical, geochemical, and geodynamical modeling
(Massachusetts Institute of Technology, 2008)
Segmentation and crustal accretion at oceanic transform fault systems are investigated through a combination of geophysical data analysis and geodynamical and geochemical modeling. Chapter 1 examines the effect of fault ...
Geomicrobiology of the ocean crust : the phylogenetic diversity, abundance, and distribution of microbial communities inhabiting basalt and implications for rock alteration processes
(Massachusetts Institute of Technology, 2007)
Basaltic ocean crust has the potential to host one of the largest endolithic communities on Earth. This portion of the biosphere, however, remains largely unexplored. In this study, we utilize molecular biological, ...
Helium and lead isotope geochemistry of oceanic volcanic rocks from the East Pacific and South Atlantic
(Massachusetts Institute of Technology, 1987)
The isotopic evolution of helium and lead in the Earth is coupled by virtue of their common radioactive parents uranium and thorium. The isotopic signatures in oceanic volcanic rocks provide constraints on the temporal ...
Age of air and the circulation of the stratosphere
(Massachusetts Institute of Technology, 2017)
The circulation of air in the stratosphere is important for the distribution of radiatively-important trace gases, such as ozone and water vapor, and other chemical species, including ozone-depleting chlorofluorocarbons. ...
An inverse approach to understanding benthic oxygen isotope records from the last deglaciation
(Massachusetts Institute of Technology, 2014)
Observations suggest that during the last deglaciation (roughly 20,000-10,000 years ago) the Earth warmed substantially, global sea level rose approximately 100 meters in response to melting ice sheets and glaciers, and ...
Thermally driven circulation
(Massachusetts Institute of Technology, 1987)
Several problems connected by the theme of thermal forcing are addressed herein. The main topic is the stratification and flow field resulting from imposing a specified heat flux on a fluid that is otherwise confined to a ...