Index Catalog // ScholarsArchive@OSU

⁴⁰Ar/³⁹Ar Ages and Trace Element Variations in Colombian Emeralds

Creator:: Svadlenak, Ellen
Abstract:: The Colombian emerald deposits are globally unique because they are hosted in hydrothermally altered black shales on either side of the Cordillera Oriental. We used electron microprobe analysis to study variations in trace element concentrations in transects across emeralds, and used the ⁴⁰Ar/³⁹Ar dating method to determine the age of...
Resource Type:: Honors College Thesis
Full Text:: the South Pacific: Hot spots or extensional volcanism?, Geochem. Geophys. Geosyst., 4, doi:10.1029

Freeze-thaw cycles in permafrost soils and their impacts on the climate: A literature review

Creator:: Bergmann, Maya K.
Abstract:: Climate change is occurring at an increasingly rapid rate, with impacts heightened in the cold regions of the world including the Arctic. Warming effects are widespread, with one impacted process – freeze-thaw cycles – increasing in frequency and potentially triggering additional changes in permafrost soils that have previously acted as...
Resource Type:: Honors College Thesis
Full Text:: Journals, John Wiley & Sons, Ltd, 18 Mar. 2020, agupubs.onlinelibrary.wiley.com/doi/abs/10.1029

A preliminary assessment of post-fire dissolved organic carbon concentrations in the McKenzie River basin, Oregon

Creator:: Hyatt, Charles
Abstract:: In recent decades, the occurrence of large, high severity wildfires has increased substantially in many parts of the world, including the western United States. These fires have the potential to impact water quality, aquatic ecosystems, and downstream communities for many decades. As such, it is increasingly important to understand the...
Resource Type:: Honors College Thesis

Atmospheric nitrous oxide in the pre-800 ka atmosphere from ice cores from the Allan Hills, Antarctica

Creator:: Stock, Marika P.
Abstract:: Nitrous oxide is an important greenhouse gas that has both natural and anthropogenic sources in the modern atmosphere (Ciais et al., 2013). This project expanded the knowledge of the history of atmospheric N2O in the geologic past by measuring N2O concentrations in air trapped in very old polar ice. A...
Resource Type:: Honors College Thesis

The Usefulness of Stable Water Isotopes in Improving Drought Prediction

Creator:: Adams, Logan
Abstract:: Drought represents an import part of natural hydrologic cycles that govern the rate and transportation of water on global and regional scales. (Trenberth, et al. 2015) Agriculturally, drought represents a threat to crop production and can endanger political and economic stability through the loss of resources and the threat of...
Resource Type:: Honors College Thesis
Full Text:: 1900–2008. Journal of Geophysical Research,116(D12). doi:10.1029/2010jd015541 Eisenhauer, N., Cesarz

Low-frequency Teleseismic and Infrasound Arrivals along the Dense Corvallis Nodal Array

Creator:: Way, Rachel
Abstract:: The dense Corvallis array deployed in January of 2022 aided in the high-resolution study of local geology. This array was made of 177 SmartSolo 3-component 5 Hz geophones around Corvallis, with a 93 geophone profile going west towards Bald Hill for approximately 5 km at an average of 64 m...
Resource Type:: Honors College Thesis
Full Text:: hunga‐tonga volcanic eruption’, Geophysical Research Letters, 49(6). doi:10.1029/2022gl098240

Evaluation of a Variable Mixing Efficiency Parameterization on the Simulation of Last Glacial Maximum (LGM) Oceanic Circulation

Creator:: Thorstensson, Danil
Abstract:: This study tested the utility of a variable mixing efficiency formulation proposed by Mashayek, et al. (2017) for use in oceanographic models other than the modern, pre-industrial ocean. This formulation is used to calculate diapycnal (vertical) mixing due to unresolved subgrid-scale processes. Results from Last Glacial Maximum (LGM) simulations for...
Resource Type:: Honors College Thesis
Full Text:: . Lett. 29(23), 2106, doi:10.1029/2002GL015633. Weaver, A. J., M. Eby , E. C. Wiebe , C. M. Bitz , Phil

Timing of Volcanism in Central Oregon: Dating Tam McArthur Rim Volcano

Creator:: Landoni, Katherine G.
Abstract:: The Tam McArthur Rim is a volcanic center located within the Tumalo Volcanic Field (TVF), approximately 25 km west of Bend, OR. The rim comprises of shallowly dipping bedded sequences of intermediate and silicic flows with minor tephra interbedding capped by a rhyodacite dome. Glacial activity has exposed significant portions...
Resource Type:: Honors College Thesis
Full Text:: , doi:10.1029/ 2015EO031573. Published on 17 June 2015. 5 Introduction The Cascadia

Kinetics of plankton respiration across gradient of anoxic to oxic conditions

Creator:: Jayawickrama, Clare
Abstract:: Ocean deoxygenation is predicted to increase in severity over the next few decades, posing a threat to marine life and fishing economies. Improved predictions of ocean deoxygenation depend on a better understanding of the biogeochemical mechanisms that underly this process. Within the realm of biogeochemical mechanisms, this project specifically investigated...
Resource Type:: Honors College Thesis
Full Text:: NITRIFICATION.” Global Biogeochemical Cycles 25, no. 4 (December 2011): n/a-n/a. https://doi.org/10.1029

Understanding Drivers of Glacier Length Variability Over the Last Millennium

Creator:: Huston, Alan C.
Abstract:: Changes in glacier length reflect the integrated response to local fluctuations in temperature and precipitation, but when do such changes indicate forced climate change, and when do they indicate natural variability? In this study, we simulate the past ~1000 years of glacier length variability across the globe using the 3-stage...
Resource Type:: Honors College Thesis
Full Text:: . https://doi.org/10.1029/2011GL050168 Oerlemans, J. (2000). Holocene glacier fluctuations: Is the

ScholarsArchive@OSU

⁴⁰Ar/³⁹Ar Ages and Trace Element Variations in Colombian Emeralds

Freeze-thaw cycles in permafrost soils and their impacts on the climate: A literature review

A preliminary assessment of post-fire dissolved organic carbon concentrations in the McKenzie River basin, Oregon

Atmospheric nitrous oxide in the pre-800 ka atmosphere from ice cores from the Allan Hills, Antarctica

The Usefulness of Stable Water Isotopes in Improving Drought Prediction

Low-frequency Teleseismic and Infrasound Arrivals along the Dense Corvallis Nodal Array

Evaluation of a Variable Mixing Efficiency Parameterization on the Simulation of Last Glacial Maximum (LGM) Oceanic Circulation

Timing of Volcanism in Central Oregon: Dating Tam McArthur Rim Volcano

Kinetics of plankton respiration across gradient of anoxic to oxic conditions

Understanding Drivers of Glacier Length Variability Over the Last Millennium

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