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Nitrogen cycling in oxygen deficient zones : insights from [delta]¹⁵N and [delta]¹⁸O of nitrite and nitrate
(Massachusetts Institute of Technology, 2013)
The stable isotopes, [delta]¹⁵N and [delta]¹⁸O, of nitrite and nitrate can be powerful tools used to interpret nitrogen cycling in the ocean. They are particularly useful in regions of the ocean where there are multiple ...
Equilibration of an atmosphere by geostrophic turbulence
(Massachusetts Institute of Technology, 2013)
A major question for climate studies is to quantify the role of turbulent eddy fluxes in maintaining the observed atmospheric mean state. It has been argued that eddy fluxes keep the mid-latitude atmosphere in a state that ...
Study of induced seismicity for reservoir characterization
(Massachusetts Institute of Technology, 2013)
The main goal of the thesis is to characterize the attributes of conventional and unconventional reservoirs through passive seismicity. The dissertation is comprised of the development and applications of three new methods, ...
Estimating regional nitrous oxide emissions using isotopic ratio observations and a Bayesian inverse framework
(Massachusetts Institute of Technology, 2018)
Atmospheric nitrous oxide (N₂O) significantly impacts Earth's climate due to its dual role as an inert potent greenhouse gas in the troposphere and as a reactive source of ozone-destroying nitrogen oxides in the stratosphere. ...
The separation of source, path and site effects on high frequency seismic waves : an analysis using coda wave techniques
(Massachusetts Institute of Technology, 1985)
A magmatic trigger for the Paleocene-Eocene thermal maximum?
(Massachusetts Institute of Technology, 2015)
Fifty-six million years ago Earth experienced rapid global warming (~6°C) that was caused by the release of large amounts of carbon into the ocean-atmosphere system. This Paleocene-Eocene Thermal Maximum (PETM) is often ...
Application of an inverse model in the community modeling effort results
(Massachusetts Institute of Technology, 1995)
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 ...
The effect of a shallow low viscosity zone on mantle convection and its expression at the surface of the earth
(Massachusetts Institute of Technology, 1987)
Many features of the oceanic plates cannot be explained by conductive cooling with age. A number of these anomalies require additional convective thermal sources at depths below the plate: mid-plate swells, the evolution ...
Adaptive error estimation in linearized ocean general circulation models
(Massachusetts Institute of Technology, 1999)
Data assimilation methods, such as the Kalman filter, are routinely used in oceanography. The statistics of the model and measurement errors need to be specified a priori. In this study we address the problem of estimating ...