Index Catalog // ScholarsArchive@OSU

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:: ., 116, G02007, doi:10.1029/2010JG001441. 1. Introduction [2] Atmospheric methane, the second most

Age systematics of two young en echelon Samoan volcanic trails

Creator:: Koppers, Anthony A. P., Russell, Jamie A., Roberts, Jed, Jackson, Matthew G., Konter, Jasper G., Wright, Dawn J., Staudigel, Hubert, and Hart, Stanley R.
Abstract:: The volcanic origin of the Samoan archipelago can be explained by one of three models, specifically, by a hot spot forming over a mantle plume, by lithospheric extension resulting from complex subduction tectonics in the region, or by a combination of these two processes, either acting sequentially or synchronously. In...
Resource Type:: Article
Full Text:: Q07025, doi:10.1029/2010GC003438 ISSN: 1525‐2027 Age systematics of two young en echelon Samoan

Temporal and crustal effects on differentiation of tholeiite to calcalkaline and ferro-trachytic suites, High Lava Plains, Oregon, USA

Creator:: Streck, Martin J. and Grunder, Anita L.
Abstract:: Strongly bimodal, basalt-rhyolite volcanism of the High Lava Plains Province of Oregon followed the Middle Miocene flood basalts of the Pacific Northwest and extends to recent time. During the 8 m.y. of volcanism recorded in the central High Lava Plains, in western Harney Basin, three distinct mafic magmatic trends originate...
Resource Type:: Article
Full Text:: , Number 1 6 November 2012 Q0AN02, doi:10.1029/2012GC004237 ISSN: 1525-2027 Temporal and crustal

Low-pressure phase equilibria of anhydrous anorthite-bearing mafic magmas

Creator:: Kohut, Edward J. and Nielsen, Roger L.
Abstract:: One of the most persistent questions regarding the phase equilibria of mid-ocean ridge basalts (MORB) pertains to the petrogenesis of the anorthitic plagioclase phenocrysts (>An₉₀) that are characteristic of the more primitive members of such suites. Anorthitic phenocrysts are present in many if not most MORB suites in spite of...
Resource Type:: Article
Full Text:: Geosystems Article Volume 4, Number 7 12 July 2003 1057, doi:10.1029/2002GC000451 ISSN: 1525-2027

Crustal‐scale pure shear foreland deformation of western Argentina

Creator:: Meigs, Andrew J. and Nábělek, John
Abstract:: New analyses of teleseismic body waves from moderate earthquakes in western Argentina demonstrate that active shortening of the Andean foreland occurs on reverse faults extending to 40–50 km depth. Existing crustal‐scale models of foreland deformation invoke thin‐skinned fault geometries, which root into an east‐dipping mid‐crustal décollement. Whereas thin‐skinned thrust sheets...
Resource Type:: Article
Full Text:: . Res. Lett., 37, L11304, doi:10.1029/2010GL043220. 1. Introduction [2] Deformation in foreland fold

Origin of minor and trace element compositional diversity in anorthitic feldspar phenocrysts and melt inclusions from the Juan de Fuca Ridge

Creator:: Adams, David T., Nielsen, Roger L., Kent, Adam J. R., and Tepley, Frank J., III
Abstract:: Melt inclusions trapped in phenocryst phases are important primarily due to their potential of preserving a significant proportion of the diversity of magma composition prior to modification of the parent magma array during transport through the crust. The goal of this investigation was to evaluate the impact of formational and...
Resource Type:: Article
Full Text:: Q12T11, doi:10.1029/2011GC003778 ISSN: 1525‐2027 Origin of minor and trace element compositional

Tropical origins of North and South Pacific decadal variability

Creator:: Shakun, Jeremy D. and Shaman, Jeffrey
Abstract:: The origin of the Pacific Decadal Oscillation (PDO), the leading mode of sea surface temperature variability for the North Pacific, is a matter of considerable debate. One paradigm views the PDO as an independent mode centered in the North Pacific, while another regards it as a largely reddened response to...
Resource Type:: Article
Full Text:: :10.1029/2009GL040313. 1. Introduction and Approach [2] The origin of Pacific decadal variability (PDV

Atmospheric CO₂ and climate from 65 to 30 ka B.P.

Creator:: Ahn, Jinho and Brook, Edward J.
Abstract:: Using new and existing ice core CO₂ data from 65 ∼ 30 ka a new chronology for CO₂ is established and synchronized with Greenland ice core records to study how high latitude climate change and the carbon cycle were linked during the last glacial period. Atmospheric CO₂ rose several thousand...
Resource Type:: Article
Full Text:: 30 ka B.P., Geophys. Res. Lett., 34, L10703, doi:10.1029/2007GL029551. 1. Introduction [2

Analyzing large paleoclimate datasets : implications for past and future climate change

Creator:: Shakun, Jeremy D.
Abstract:: This dissertation presents the results of statistical analyses of large climate datasets from two time intervals – the 20th century instrumental record and the proxy record of the last deglaciation – in order to understand the forcings and mechanisms of past climate variability. A longstanding question in climate dynamics concerns...
Resource Type:: Dissertation
Full Text:: :10.1029/2008GL037022

Evolution of sediment accommodation space in steady state bedrock-incising valleys subject to episodic aggradation

Creator:: Lancaster, Stephen T.
Abstract:: Steepland valleys subject to debris flows incise bedrock even as episodic deposition typically covers valley bottoms. This paper’s hypothesis is that, while continual fluvial processes evacuate deposits, storage of episodic deposition drives valley widening and, thereby, creation of accommodation space for sediment storage on the valley floor. Data from three...
Resource Type:: Article
Full Text:: . Geophys. Res., 113, F04002, doi:10.1029/2007JF000938. 1. Introduction [2] In active orogens where

ScholarsArchive@OSU

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

Age systematics of two young en echelon Samoan volcanic trails

Temporal and crustal effects on differentiation of tholeiite to calcalkaline and ferro-trachytic suites, High Lava Plains, Oregon, USA

Low-pressure phase equilibria of anhydrous anorthite-bearing mafic magmas

Crustal‐scale pure shear foreland deformation of western Argentina

Origin of minor and trace element compositional diversity in anorthitic feldspar phenocrysts and melt inclusions from the Juan de Fuca Ridge

Tropical origins of North and South Pacific decadal variability

Atmospheric CO₂ and climate from 65 to 30 ka B.P.

Analyzing large paleoclimate datasets : implications for past and future climate change

Evolution of sediment accommodation space in steady state bedrock-incising valleys subject to episodic aggradation

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