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Chemical characterization of dissolved organic matter (DOM) in seawater : structure, cycling, and the role of biology
(Massachusetts Institute of Technology, 2005)
The goal of this thesis is to investigate three different areas relating to the characterization of dissolved organic matter (DOM): further determination of the chemical compounds present in high molecular weight DOM ...
Finescale abyssal turbulence : sources and modeling
(Massachusetts Institute of Technology, 2020)
A detailed understanding of the intensity and three-dimensional spatial distribution of diabatic abyssal turbulence is germane to understanding the abyssal branch of the global overturning circulation. This thesis addresses ...
Water and volatile element accretion to the inner planets
(Massachusetts Institute of Technology, 2018)
This thesis investigates the timing and source(s) of water and volatile elements to the inner solar system by studying the basaltic meteorites angrites and eucrites. In chapters 2 and 3, I present the results from angrite ...
Slip on ridge transform faults : insights from earthquakes and laboratory experiments
(Massachusetts Institute of Technology, 2005)
The relatively simple tectonic environment of mid-ocean ridge transform fault (RTF) seismicity provides a unique opportunity for investigation of earthquake and faulting processes. We develop a scaling model that is complete ...
Reconstructing deglacial ocean ventilation using radiocarbon : data and inverse modeling
(Massachusetts Institute of Technology, 2017)
Significant changes occurred during the last deglaciation (roughly 10-20 thousand years (ka) before present) throughout the climate system. The ocean is a large reservoir of carbon and heat, however, its role during the ...
The CAFE experiment : a joint seismic and MT investigation of the Cascadia subduction system
(Massachusetts Institute of Technology, 2013)
In this thesis we present results from inversion of data using dense arrays of collocated seismic and magnetotelluric stations located in the Cascadia subduction zone region of central Washington. In the migrated seismic ...
The biogeochemistry of marine particulate trace metals
(Massachusetts Institute of Technology, 2014)
Marine particles include all living and non-living solid components of seawater, representing an extremely dynamic and chemically diverse mixture of phases. The distributions of these phases are poorly constrained and ...
Aridification of the Indian subcontinent during the Holocene : implications for landscape evolution, sedimentation, carbon cycle, and human civilizations
(Massachusetts Institute of Technology, 2012)
The Indian monsoon affects the livelihood of over one billion people. Despite the importance of climate to society, knowledge of long-term monsoon variability is limited. This thesis provides Holocene records of monsoon ...
Insights into vitamin B₁₂ production, acquisition, and use by marine microbes
(Massachusetts Institute of Technology, 2012)
The distribution and magnitude of marine primary production helps determine the ocean's role in global carbon cycling. Constraining factors that impact this productivity and elucidating selective pressures that drive the ...
Investigating Mexican paleoclimate with precisely dated speleothems
(Massachusetts Institute of Technology, 2020)
Speleothems, or sedimentary rocks formed in caves, act as valuable archives of past climate change due to their suitability for U-series dating and high-resolution proxy analysis. These records can provide insights into ...