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451 - 475 of 881 Items << < 14 15 16 17 18 19 20 21 22 23 > >>
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The authors present inferences of diapycnal diffusivity from a compilation of over 5200 microstructure
profiles. As microstructure observations are sparse, these are supplemented with indirect measurements of
mixing obtained from (i) Thorpe-scale...
2014-07 (iso8601)
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Large ignimbrite flare-ups provide records of profound crustal modification during batholith formation at depth. The locations of source calderas and volumes and ages of the eruptions must be determined to develop models for the tectonomagmatic...
2013-01-31 (iso8601)
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The energetics of large amplitude, high-frequency nonlinear internal waves (NLIWs) observed over the New Jersey continental shelf are summarized from ship and mooring data acquired in August 2006. NLIW energy was typically on the order of 10⁵...
2010-08-30 (iso8601)
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The generalized inverse of a regional model is used to estimate barotropic tidal dissipation along the Hawaiian Ridge. The model, based on the linear shallow-water equations, incorporates parameterizations for the dissipation of energy via...
2006-06 (iso8601)
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Global seasonal cycles of the wind and wind stress fields estimated from the 8-yr record (September 1999–August 2007) of wind measurements by the NASA Quick Scatterometer (QuikSCAT) are presented. While this atlas, referred to here as the...
2008-11 (iso8601)
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Synchronous runup records were collected from 14 locations spaced irregularly over a 7 km stretch of
a low-slope beach. The significant runup height, herein defined as the significant vertical excursion of
water level at the shoreline, was...
1984 (iso8601)
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Analytical and numerical models are used to study the effects of
a meridional ridge on the propagation of barotropic Rossby waves produced by
distant wind stress forcing. The analytical model illustrates the qualitative aspects
of the problem by...
1995-09-15 (iso8601)
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Sediments at the southern summit of Hydrate Ridge display two distinct
modes of gas hydrate occurrence. The dominant mode is associated
with active venting of gas exsolved from the accretionary prism
and leads to high concentrations (15%–40% of...
2006 (iso8601)
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Montane forest vegetation as it occurs on the east flank of the
central Oregon Cascades has provided excellent conditions for a
"natural experiment" in the use of various methodologies in studying
vegetational distribution. This "experiment" has...
1964-06-10 (iso8601)
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This study evaluates the Earth Resources Technology Satellite-
One (ERTS-1) multispectral scanner (MSS) as a means of predicting
lacustrine trophic state and the magnitude of selected trophic state
indicators.
Numerical classificatory methods are...
1974-12-06 (iso8601)
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National-scale analyses of fire occurrence are needed to prioritize fire policy and
management activities across the United States. However, the drivers of national-scale
patterns of fire occurrence are not well understood, and how the relative...
2013-04 (iso8601)
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The ecology of netleaf hackberry (Celtis reticulata Torr.) is poorly known
throughout its broad western range. To gain some understanding of the species' basic
ecology, three components of its life history were studied. First, seed germination...
1992-11-23 (iso8601)
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The Mosquitia Region of Honduras is part of the largest wilderness area in Central
America. In terms of biodiversity the area is rich in ecosystems including pine savannas,
tropical rain forests, and wetlands. These ecosystems are rich in millions...
1997-06 (iso8601)
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The purpose of this study is to examine the relationship between land
management practices of Indian communities prior to contact with
Europeans and the nature or character of subsequent catastrophic forest
fires in the Oregon Coast Range. The...
2003-07-08 (iso8601)
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This study was undertaken in an attempt gain a more thorough understanding of stream/aquifer interactions on camp Creek in Central Oregon. Sections of the creek were excluded from livestock grazing between 1966 and the present. Objectives of the...
1988-05-10 (iso8601)
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Knowledge about vegetation patterns and ecological processes in unmanaged, late-successional
watersheds is needed to provide a foundation for forest management strategies
aimed at conserving native biodiversity. I examined influences of...
1999-05-14 (iso8601)
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Stocking characteristics and heights attained by tree
seedlings at ages five and seven were measured on 45 study
units, representing five habitat types, established on
clearcuts in the Abies amabilis zone in the Western Cascades
of Oregon. The...
1976-04-26 (iso8601)
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Knowledge of regional-scale patterns of plant community structure and controlling factors is largely qualitative and based on numerous local studies. Data from a subsample of 10,000 field plots were used to quantify and map compositional gradients...
1995-11-29 (iso8601)
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This investigation on fire mosaics addressed several aspects:
(1) quantifying the role of terrain variables in fire-related
mortality and historical mean fire return interval (MFRI), (2)
comparing post-burn Landsat Thematic Mapper (TM) imagery,...
1996-02-16 (iso8601)
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The management of existing forest road systems is an issue of growing importance and
public debate. Roads can alter the hydrologic processes in a watershed especially at stream crossing culverts where road ditches channel runoff directly into the...
2004-04-30 (iso8601)
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The Salt Range is clearly the active participant in the scenario of the progressive southward migration of the Himalayan thrust front. It extends approximately 180 km ENE along strike and is underlain by salt. This is manifested by its very narrow...
1991-09-26 (iso8601)
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The movements, habitat use, and activity patterns of black-tailed deer in western Oregon, and the influence of suburban housing developments on the behavior of deer in the area, were studied and described. Radio telemetry, spotlight censusing, and...
1982-11-18 (iso8601)
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In the area surrounding Clarno, Oregon, pre-Cretaceous metamorphics, Cretaceous marine sediments, and a varied assemblage of Tertiary volcanic rocks are known. The oldest exposures are of an homogeneously fine-grained, mildly metamorphosed, limy...
1960-05-02 (iso8601)
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The basaltic landscapes of the Oregon High Cascades form a natural laboratory for examining how geologic setting and history influence groundwater flowpaths, streamflow sensitivity to climate, and landscape evolution. In the High Cascades, highly...
2006-10-13T20:00:22Z (iso8601)
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Topographic Map of Santo Domingo and San Felipe
2006-04-20 |
