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ScholarsArchive at Oregon State University
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A key challenge for resource and land managers is predicting the consequences of climate warming on streamflow and water
resources. During the last century in the western United States, significant reductions in snowpack and earlier snowmelt have...
2013-01-04 (iso8601)
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Di-nitrogen (N₂) fixation plays a well-recognized role in the enhancement of primary production
and arguably particle export in oligotrophic regions of the subtropical and tropical oceans.
However, recent evidence suggests that N₂ fixation may...
2013-02 (iso8601)
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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...
2013-01-01 (iso8601)
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The response of tidal and residual currents to small scale morphological differences over abrupt
deep sea topography (Seine Seamount) was estimated for bathymetry grids of different spatial
resolution. Local barotropic tidal model solutions were...
2013-03 (iso8601)
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Firn air transport models are used to interpret measurements of the composition of air in firn and bubbles trapped in ice in order to reconstruct past atmospheric composition. The diffusivity profile in the firn is usually calibrated by comparing...
2012-07-19 (iso8601)
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Marine microorganisms play a significant role in the cycling of nutrients in the open ocean through production, consumption, and degradation of organic matter (OM). Carbon (C), nitrogen (N), and phosphorus (P) are essential ingredients in every...
2013-03-21 (iso8601)
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Debris flows, which occur in mountain settings worldwide, have been particularly damaging in the glaciated basins flanking the stratovolcanoes in the Cascade Range of the northwestern United States. This thesis contains two manuscripts that...
2013-03-15 (iso8601)
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The 10-m neutral drag coefficient (C[subscript DN10]) over the sea is calculated using a large observational dataset consisting of 5800 estimates of the mean flow and the fluxes from aircraft eddy-covariance measurements. The dataset includes...
2013-02 (iso8601)
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Air particulate matter (PM) samples were collected from June 2006 to May 2007 for determination chemical elements. PM samples were taken in two size fractions (PM₂.₅ and PM₁₀) with MiniVolume air samplers on rooftops of various buildings (15-25 m...
2013-02 (iso8601)
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This paper presents the design and evaluates the performance of a double-walled electrically aspirated radiation shield for thermometers measuring air temperature and its gradients in the atmospheric surface layer. Tests were performed to quantify...
2013-03 (iso8601)
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Basic research on semantic interoperability is just beginning to address support for
spatial data and information. This is clearly important for data portals containing
geographic information system (GIS) layers, as well as supplemental...
2008-09 (iso8601)
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We present the geomorphology of the Eastern Samoa Volcanic Province,
covering 28,446 km², and depths ranging from ~50-4000 m. A new compilation of
available multibeam data reveals 51 previously undocumented seamounts, and
delineates major...
2012 (iso8601)
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Cyberinfrastructure integrates advanced computer, information, and communication
technologies to empower computation-based and data-driven scientific practice, and
improve the synthesis and analysis of scientific data in a collaborative and shared...
2011-04-05 (iso8601)
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Capturing the spatial distribution of high-intensity rainfall over short-time intervals is critical for accurately assessing the efficacy of urban stormwater drainage systems. In a stochastic simulation framework, one method of generating...
2012-03-06 (iso8601)
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Biological di-nitrogen (N₂) fixation is a key process in open-ocean ecosystems, where the new nitrogen (N) provided by marine diazotrophs can support a large fraction of primary productivity and carbon (C) drawdown. Recent laboratory studies have...
2013-03-15 (iso8601)
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A new method is introduced for incorporating bathymetric uncertainty into predictions of nearshore and river flows (i.e., unstratified flows primarily forced by pressure and radiation stress gradients). The method involves the use of the ensemble...
2013-04-15 (iso8601)
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Marine environments, key life-support systems for the earth, are under severe threat. Issues
associated with managing these common property resources are complex and interrelated.
Networks of marine reserves can be valuable for mitigating threats...
2011-11 (iso8601)
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Teaching GIS involves teaching ethical and moral thinking as a distinct engagement with
the use, applications, and responsibilities of GIS professionals. Over the past 20 years
scholars (particularly those affiliated with the discipline of...
2011-12 (iso8601)
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The western United States is experiencing significant changes in wildfire and snow regimes as a result of warming temperatures. An amplification of wildfire activity and reduction in snow water equivalent, snow covered area, and earlier spring...
2013-05-02 (iso8601)
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Ballast water discharges are a major source of species introductions into marine
and estuarine ecosystems. To mitigate the introduction of new invaders into these ecosystems,
many agencies are proposing standards that establish upper concentration...
2013-03 (iso8601)
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Shifts in tree species ranges may occur due to global climate change, which in turn may be exacerbated
by natural disturbance events. Within the context of global climate change, developing techniques to
monitor tree range dynamics as affected by...
2013-01-07 (iso8601)
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The southeast Pacific Ocean is covered by the world's largest stratocumulus cloud layer, which has a strong impact on ocean temperatures and climate in the region. The effect of anthropogenic sources of aerosol particles on the stratocumulus deck...
2013-03-05 (iso8601)
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The rhenium-osmium isotopic system has the potential to track the maturation of arc crust at lower crustal levels because the ¹⁸⁷Os/¹⁸⁸Os in magmas is sensitive to the age and composition of crust with which they interact. We here present Re and...
2013-02-14 (iso8601)
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1. Temperature is a major driver of ecological processes in stream ecosystems, yet the dynamics of
thermal regimes remain poorly described. Most work has focused on relatively simple descriptors
that fail to capture the full range of conditions...
2013-05 (iso8601)
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