Index Catalog // ScholarsArchive@OSU

Assessment of diffusive isotopic fractionation in polar firn, and application to ice core trace gas records

Creator:: Buizert, Christo, Sowers, Todd, and Blunier, Thomas
Abstract:: During rapid variations of the atmospheric mixing ratio of a trace gas, diffusive transport in the porous firn layer atop ice sheets and glaciers alters the isotopic composition of that gas relative to the overlying atmosphere. Records of past atmospheric trace gas isotopic composition from ice cores and firn need...
Resource Type:: Article
Full Text:: ., Sowers, T., Barnola, J.M., Blunier, T., Fuchs, A., Malaize, B., 1997. Age scale of the air in the Summit

Gases in ice cores

Creator:: Bender, Michael, Sowers, Todd, and Brook, Edward J.
Abstract:: Air trapped in glacial ice offers a means of reconstructing variations in the concentrations of atmospheric gases over time scales ranging from anthropogenic (last 200 yr) to glacial/interglacial (hundreds of thousands of years). In this paper, we review the glaciological processes by which air is trapped in the ice and...
Resource Type:: Article
Full Text:: . Gases in ice cores MICHAEL BENDER*, TODD SOWERS†, AND EDWARD BROOK*‡ *Graduate School of Oceanography

Multidecadal variability of atmospheric methane, 1000–1800 C.E.

Creator:: Mitchell, Logan E., Brook, Edward J., Sowers, Todd, McConnell, J. R., and Taylor, Kendrick
Abstract:: We present a new high-precision, high-resolution record of atmospheric methane from the West Antarctic Ice Sheet (WAIS) Divide ice core covering 1000–1800 C.E., a time period known as the late preindustrial Holocene (LPIH). The results are consistent with previous measurements from the Law Dome ice core, the only other high-resolution...
Resource Type:: Article
Full Text:: , 1000–1800 C.E. Logan E. Mitchell,1 Edward J. Brook,1 Todd Sowers,2 J. R. McConnell,3 and Kendrick

MitchellLoganCEOASConstraintsLateHoloceneSupplementaryMaterials.pdf

Creator:: Mitchell, Logan, Brook, Edward J., Lee, James E., Buizert, Christo, and Sowers, Todd
Abstract:: The origin of the late pre-industrial Holocene (LPIH) increase in atmospheric methane concentrations has been much debated. Hypotheses invoking changes in solely anthropogenic sources or solely natural sources have been proposed to explain the increase in concentrations. Here two high-resolution, high-precision ice core methane concentration records from Greenland and Antarctica...
Full Text:: Buizert, Todd Sowers *Corresponding author. E-mail: Logan.E.Mitchell@gmail.com Published 22

MitchellLoganCEOASConstraintsLateHolocene.pdf

Creator:: Mitchell, Logan, Brook, Edward J., Lee, James E., Buizert, Christo, and Sowers, Todd
Abstract:: The origin of the late pre-industrial Holocene (LPIH) increase in atmospheric methane concentrations has been much debated. Hypotheses invoking changes in solely anthropogenic sources or solely natural sources have been proposed to explain the increase in concentrations. Here two high-resolution, high-precision ice core methane concentration records from Greenland and Antarctica...
Full Text:: Buizert1, Todd Sowers2 Affiliations: 1Oregon State University, College of Earth, Ocean, and Atmospheric

Constraints on the Late Holocene Anthropogenic Contribution to the Atmospheric Methane Budget

Creator:: Mitchell, Logan, Brook, Edward J., Lee, James E., Buizert, Christo, and Sowers, Todd
Abstract:: The origin of the late pre-industrial Holocene (LPIH) increase in atmospheric methane concentrations has been much debated. Hypotheses invoking changes in solely anthropogenic sources or solely natural sources have been proposed to explain the increase in concentrations. Here two high-resolution, high-precision ice core methane concentration records from Greenland and Antarctica...
Resource Type:: Article

Water Restoration Certificates™: Building a Bridge Between Urban Water Users and Flow Restoration Needs in the Rural West

Creator:: Reeve, Todd
Abstract:: Across Oregon and other PNW states thousands of miles of rivers, streams and adjacent wetlands are chronically de-watered as a result of over-appropriated water rights. In Montana alone, chronic or periodic de-watering occurs in over 4,000 miles of streams across 381 different river or stream systems. The ecological harm resulting...
Resource Type:: Presentation
Full Text:: ) Program Oregon Water Conference Todd Reeve | 5.24.2011 * SLIDE * About BEF Non-profit “business

An interlaboratory comparison of techniques for extracting and analyzing trapped gases in ice cores

Creator:: Sowers, Todd, Brook, Edward J., Etheridge, David, Blunier, Thomas, Fuchs, Andreas, Leuenberger, Markus, Chappellaz, Jerome, Barnola, Jean Marc, Wahlen, Martin, Deck, Bruce, and Weyhenmeyer, Connie
Abstract:: We undertook an interlaboratory comparison of techniques used to extract and analyze trapped gases in ice cores. The intercomparison included analyses of standard reference gases and samples of ice from the Greenland Ice Sheet Project 2 (GISP2) site. Concentrations of CO₂, CH₄, the δ¹⁸O of O₂, the δ¹⁵N of N₂,...
Resource Type:: Article
Full Text:: trapped gases in ice cores Todd Sowers 1, Ed Brook 2,3, David Etheridge 4, Thomas Blunier 5, Andreas

Water Quality Data Synthesis in the Metolius River Basin, Oregon

Creator:: Lee, Baek Soo and Jarvis, W. Todd
Abstract:: The Metolius River basin is a sub-basin of the Deschutes Basin within central Oregon. Considered one of the crown jewels of the state, this historically undisturbed basin drew attention in 2009 because the Oregon legislature designated the basin as the first Area of Critical State Concern (ACSC) under the state’s...
Resource Type:: Presentation
Full Text:: State University W. Todd JARVIS, Ph.D. Department of Geosciences and Institute for Water and Watersheds

IPM Implementation--A Progress Report

Creator:: Todd, James G.
Resource Type:: Conference Proceeding
Full Text:: Controls IPM IMPLEMENTATION—A PROGRESS REPORT James G. Todd Willamette Agricultural Consulting 7555

ScholarsArchive@OSU

Assessment of diffusive isotopic fractionation in polar firn, and application to ice core trace gas records

Gases in ice cores

Multidecadal variability of atmospheric methane, 1000–1800 C.E.

MitchellLoganCEOASConstraintsLateHoloceneSupplementaryMaterials.pdf

MitchellLoganCEOASConstraintsLateHolocene.pdf

Constraints on the Late Holocene Anthropogenic Contribution to the Atmospheric Methane Budget

Water Restoration Certificates™: Building a Bridge Between Urban Water Users and Flow Restoration Needs in the Rural West

An interlaboratory comparison of techniques for extracting and analyzing trapped gases in ice cores

Water Quality Data Synthesis in the Metolius River Basin, Oregon

IPM Implementation--A Progress Report

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