Index Catalog // ScholarsArchive@OSU

Siberian-Arctic shelf surface-sediments: sources, transport pathways and processes, and diagenetic alteration

Creator:: Viscosi-Shirley, Carolyn
Abstract:: This thesis investigates lithogenic sediments on the Siberian Arctic shelf, their sources, modes of dispersal, transport pathways and post-depositional diagenetic alteration. Working with cores collected from the Chukchi, East Siberian and Laptev Seas, we characterize surface-sediment elemental chemistry and clay mineralogy. We identify five regions with endmember sedimentary compositions. Comparing...
Resource Type:: Dissertation
Full Text:: . Abstract approved: Nicklas G. Pisias This thesis investigates lithogenic sediments on the Siberian Arctic

Changing export production in the Eastern Equatorial Pacific, 160 ka to present

Creator:: Kish, Stacy W.
Abstract:: The increase in modern atmospheric CO₂ concentration (360 ppm) from pre-industrial levels (280 ppm) raises concern over the impact of anthropogenic carbon dioxide input on atmospheric chemistry. For this reason, it is important to understand the natural fluctuations of atmospheric carbon dioxide in the past. The Vostok ice core record...
Resource Type:: Masters Thesis
Full Text:: the Eastern Ecuatonal Pacific, 160 ka to Present. Abstract approved Nicklas G. Pisias The increase

The fluvial response to glacial-interglacial climate change in the Pacific Northwest, USA

Creator:: VanLaningham, Sam J.
Abstract:: This research focuses on the development of new techniques to explore terrestrial-ocean climate linkages along the Pacific Northwest-northeast Pacific Ocean margin. This is done by investigating river response to climate change and by unraveling this history preserved in continental margin sediments. A significant component of this work centers on developing...
Resource Type:: Dissertation
Full Text:: A. Duncan Nicklas G. Pisias This research focuses on the

Hazards of inequality : comparing two neighborhoods in San Francisco in the 1989 Loma Prieta Earthquake

Creator:: Moore, Monika Z.
Abstract:: This study examined two neighborhoods in San Francisco with similar earthquake-induced ground failure history -- the Marina District and the South of Market Area (SoMa) -- in the aftermath of the 1989 Loma Prieta earthquake. The earthquake struck shortly after 5 pm on October 17th, 1989 and registered 6.9 in...
Resource Type:: Masters Thesis
Full Text:: . Stephen Lancaster, Dr. Dawn Wright and Dr. Nicklas Pisias. I would also like to thank M. Patti

Patterns of CaCO₃deposition in the eastern tropical Pacific Ocean for the last 150 kyr: Evidence for a southeast Pacific depositional spike during marine isotope stage (MIS) 2

Creator:: Lyle, Mitchell, Mix, Alan C., and Pisias, Nicklas G.
Abstract:: We constructed biogenic mass accumulation rate (MAR) time series for eastern Pacific core transects across the equator at ~105˚and ~85˚W and along the equator from 80˚to 140˚W. We used empirical orthogonal function (EOF) analysis to extract spatially coherent patterns of CaCO₃deposition for the last 150 kyr. EOF mode 1 (51%...
Resource Type:: Article
Full Text:: State University, Boise, Idaho, USA Alan Mix and Nicklas Pisias College of Ocean and Atmospheric

Relative timing and variability of atmospheric methane and GISP2 oxygen isotopes between 68 and 86 ka

Creator:: Grachev, Alexi M., Brook, Edward J., Severinghaus, Jeffrey P., and Pisias, Nicklas G.
Abstract:: The global biogeochemical cycle of methane has received wide attention because of methane's role as a greenhouse gas. Measurements of methane in air trapped in Greenland ice cores provide a high-resolution record of methane levels in the atmosphere over the past ~100 ka, providing clues about what controls the methane...
Resource Type:: Article
Full Text:: . Severinghaus,3 and Nicklas G. Pisias4 Received 16 August 2008; revised 20 January 2009; accepted 10 February

Erosion by rivers and transport pathways in the ocean: A provenance tool using 40Ar--39Ar incremental heating on fine-grained sediment

Creator:: VanLaningham, Sam, Duncan, Robert A., and Pisias, Nicklas G.
Abstract:: We use Ar-40-Ar-39 incremental heating to fingerprint bulk fluvial sediment entering the northeast Pacific Ocean, with the long-term intent of tracking sediment source and transport changes from the terrestrial system to the marine environment through time. We show reproducible age spectra from individual rivers accounting for the majority of sediment...
Resource Type:: Article
Full Text:: ,1 Robert A. Duncan,1 and Nicklas G. Pisias1 Received 23 May 2006; accepted 8 September 2006

Do vigorous young forests reduce streamflow? Results from up to 54 years of streamflow records in eight paired-watershed experiments in the H. J. Andrews and South Umpqua Experimental Forests

Creator:: Perry, Timothy D.
Abstract:: This study quantified the magnitude and timing of summer streamflow deficits in paired-watershed experiments in the Cascade Range of Oregon where mature and old-growth conifer forests were subjected to clearcutting, patch cutting, and overstory thinning treatments in the 1960s and 1970s. Hydrologic effects of clearcutting, small-patch cutting, and overstory thinning...
Resource Type:: Masters Thesis

Past climate variability in southwestern Oregon and relationships with regional and hemispheric climate

Creator:: Ersek, Vasile
Abstract:: This dissertation presents the results of three studies that assessed climate variability on short and long timescales in western United States. The growth of carbonate formations in caves (speleothems) is used to infer the timing and amplitude of past climate variability. We first assess the controls on speleothem growth for...
Resource Type:: Dissertation
Full Text:: research projects presented in this dissertation. My committee members, Nick Pisias, Ed Brook and

Late Quaternary paleoceanography of the Northeast Pacific and Atlantic Oceans based on diatom transfer functions

Creator:: Lopes, Cristina Isabel Coelho Dias
Abstract:: Modern upwelling conditions and corresponding oceanographic properties are investigated and reconstructed for the Late Quaternary. The oceanographic conditions considered influence diatom ecology and the record of fossil diatom frustules in the sediments. Diatoms from modern sediments are evaluated as paleoceanographic proxies and transfer functions (TFs) are calibrated using the Imbrie...
Resource Type:: Dissertation
Full Text:: committee members Nicklas Pisias, Ricardo Letelier, Peter Clark and Stephen Giovannoni and to Jim McManus

ScholarsArchive@OSU

Siberian-Arctic shelf surface-sediments: sources, transport pathways and processes, and diagenetic alteration

Changing export production in the Eastern Equatorial Pacific, 160 ka to present

The fluvial response to glacial-interglacial climate change in the Pacific Northwest, USA

Hazards of inequality : comparing two neighborhoods in San Francisco in the 1989 Loma Prieta Earthquake

Patterns of CaCO₃deposition in the eastern tropical Pacific Ocean for the last 150 kyr: Evidence for a southeast Pacific depositional spike during marine isotope stage (MIS) 2

Relative timing and variability of atmospheric methane and GISP2 oxygen isotopes between 68 and 86 ka

Erosion by rivers and transport pathways in the ocean: A provenance tool using 40Ar--39Ar incremental heating on fine-grained sediment

Do vigorous young forests reduce streamflow? Results from up to 54 years of streamflow records in eight paired-watershed experiments in the H. J. Andrews and South Umpqua Experimental Forests

Past climate variability in southwestern Oregon and relationships with regional and hemispheric climate

Late Quaternary paleoceanography of the Northeast Pacific and Atlantic Oceans based on diatom transfer functions

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