Index Catalog // ScholarsArchive@OSU

The Ocean Circulation and Carbon Cycle during the Last Glacial Maximum

Creator:: Muglia, Juan
Abstract:: During the Last Glacial Maximum (LGM, ∼ 21 ky before present) the atmospheric CO2 concentration was about 100 ppm lower than its pre-industrial (PI)value. The missing carbon from the atmosphere must have been stored in thedeep ocean during this period, but the mechanisms driving such re-distribution ofthe carbon cycle are...
Resource Type:: Dissertation
Full Text:: Circulation and Carbon Cycle during the Last Glacial Maximum Abstract approved: Andreas Schmittner During

Nitrogen isotopes in a global ocean biogeochemical model : constraints on the coupling between denitrification and nitrogen fixation

Creator:: Somes, Christopher J.
Abstract:: We present a new nitrogen isotope model incorporated into the three-dimensional ocean component of a global Earth System Climate Model designed for millennial timescale simulations. The model includes prognostic tracers for the stable nitrogen isotopes, ¹⁴N and ¹⁵N, in the nitrate (NO₃ˉ), phytoplankton, zooplankton, and detritus variables of the marine...
Resource Type:: Masters Thesis
Full Text:: : Andreas Schmittner We present a new nitrogen isotope model incorporated into the three-dimensional

Take me out to (analyze) the ballgame : visualization and analysis techniques for big spatial data

Creator:: Comiskey, Chris
Abstract:: For spatial data visualization, we approach two problems and provide solutions: heat map resolution selection, and heat map confidence interval presentation. Analysts often present spatial data in gridded heat maps, at some chosen resolution. However, many data types vary in density across the domain. We develop variable-resolution heat maps to...
Resource Type:: Dissertation

Valuing options in a discrete time regime switching model with jumps

Creator:: Chunikhina, Evgenia V.
Abstract:: In this work, we provide a detailed analysis of a discrete time regime switching financial market model with jumps. We consider the model under two different scenarios: known and unknown initial regime. For each scenario we investigated conditions that guarantee the model's completeness. We find that the model under consideration...
Resource Type:: Masters Thesis

The use of surface energy balance models as a means to quantify changes in glacier mass balance : an application to the Collier Glacier

Creator:: Beedlow, Andrew Cody
Abstract:: This thesis presents the results of an investigation into the measured and modeled mass balance of the Collier Glacier, a small (0.70 km²), valley glacier located in the Oregon Cascade Range (44° 10' N, 121° 47' W). Here we present mass-balance measurements conducted for the 2009 and 2010 balance years...
Resource Type:: Masters Thesis

Nonlinear solvers for a model problem of fluid flow in the subsurface

Creator:: Biederman, Shannon Miriah
Abstract:: Water is one of the most biologically and economically important substances on Earth. A significant portion of Earth's water subsists in the subsurface. Our ability to monitor the flow and transport of water and other fluids through this unseen environment is crucial for a myriad of reasons. One difficulty we...
Resource Type:: Masters Thesis

Abrupt deglacial climate changes in the North Pacific and implications for climate tipping points

Creator:: Praetorius, Summer Kate
Abstract:: Paleoclimate archives have revealed abrupt climate events that are superimposed on more gradual climate changes throughout the last glacial and deglacial periods. The underlying causes of such rapid climate changes are still poorly understood, but the strong expression of these events in northern hemisphere records likely points to climatic mechanisms...
Resource Type:: Dissertation
Full Text:: Prahl, Andy Ross, Andreas Schmittner, Jeremy Shakun, John Southon, Joseph Stoner, Matt Wolhowe, and

Paleoclimate, paleoventilation, and paleomagnetism as recorded in a 17kyr marine sediment record from the SE Alaska margin

Creator:: Davies, Maureen Helen
Abstract:: The deglacial behavior of the sub-Arctic North Pacific is poorly constrained, with many published records suffering from limited age control due to extensive post- depositional biogenic carbonate dissolution. Potential alternative dating methods could include the correlation of stable-isotopic and/or paleomagnetic secular variation records to an independently-dated regional template, however no...
Resource Type:: Dissertation
Full Text:: thoughtful input and oversight of my committee members: Andreas Schmittner, Nick Pisias, Ed Brook, and

Simulating past, present, and future changes in ENSO : a model evaluation and data-model comparison

Creator:: Alder, Jay R.
Abstract:: This thesis presents the results of a formal evaluation of a new AOGCM, GENMOM, demonstrating its ability to simulate present-day climate and ENSO dynamics. The model is applied to simulate climate for the Last Glacial Maximum, deglacial, and Holocene time periods. The model output is evaluated against the best available...
Resource Type:: Dissertation
Full Text:: Jones for constantly reinforcing that climate modeling is geography. To Andreas Schmittner for being

Investigating climate feedbacks across forcing magnitudes and time scales using the radiative kernel technique

Creator:: Jonko, Alexandra
Abstract:: Radiative feedbacks associated with changes in water vapor, temperature, surface albedo and clouds remain a major source of uncertainty in our understanding of climate's response to anthropogenic forcing. In this dissertation climate model data is used to investigate variations in feedbacks that result from changing CO₂ forcing and the time...
Resource Type:: Dissertation
Full Text:: present: Eric Skyllingstad, Andreas Schmittner, Jim Coakley, James Liburdy, Dudley Chelton and Jeffrey

ScholarsArchive@OSU

The Ocean Circulation and Carbon Cycle during the Last Glacial Maximum

Nitrogen isotopes in a global ocean biogeochemical model : constraints on the coupling between denitrification and nitrogen fixation

Take me out to (analyze) the ballgame : visualization and analysis techniques for big spatial data

Valuing options in a discrete time regime switching model with jumps

The use of surface energy balance models as a means to quantify changes in glacier mass balance : an application to the Collier Glacier

Nonlinear solvers for a model problem of fluid flow in the subsurface

Abrupt deglacial climate changes in the North Pacific and implications for climate tipping points

Paleoclimate, paleoventilation, and paleomagnetism as recorded in a 17kyr marine sediment record from the SE Alaska margin

Simulating past, present, and future changes in ENSO : a model evaluation and data-model comparison

Investigating climate feedbacks across forcing magnitudes and time scales using the radiative kernel technique

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