Browse by Archive
ScholarsArchive at Oregon State University
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Outreach is a small, but significant component to modern research.
Developing an exhibit for public display can be an effective way to communicate science to broad audiences, although it may be a less familiar method to scientists than writing...
2011-10-28 (iso8601)
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A nested, nondivergent barotropic numerical weather prediction model for forecasting tropical cyclone motion out to 48 h is initialized at time t = 0 by assimilating data from the preceding 24 h. The assimilation scheme finds the generalized...
1993-06 (iso8601)
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Wind measurements by the National Aeronautics and Space Administration (NASA) scatterometer (NSCAT) and the SeaWinds scatterometer on the NASA QuikSCAT satellite are compared with buoy observations to establish that the accuracies of both...
2005-02 (iso8601)
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An analysis of variational data assimilation schemes for linear dynamical forecast models shows that the penalty functional must include an explicit contribution from the initial conditions in order to ensure a unique, low-noise forecast. The...
1991-04 (iso8601)
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Measurements of near-surface winds by the NASA scatterometer (NSCAT) from October 1996 through June 1997 are analyzed to investigate the three major wind jets along the Pacific coast of Central America that blow over the Gulfs of Tehuantepec,...
2000-07 (iso8601)
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Satellite estimates of winds at 10 m above the sea surface by the NASA scatterometer (NSCAT) during the 9-month period October 1996–June 1997 are analyzed to investigate the correlations between the three major wind jets along the Pacific coast of...
2000-07 (iso8601)
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The value of Quick Scatterometer (QuikSCAT) measurements of 10-m ocean vector winds for marine
weather prediction is investigated from two Northern Hemisphere case studies. The first of these focuses on
an intense cyclone with hurricane-force...
2006-08 (iso8601)
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A physical and mathematical framework for the mutually consistent parameterization of the effects of cumulus convection on the large-scale momentum and vorticity fields is proposed. The key to achieving consistency is the understanding that the...
1987-03 (iso8601)
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In simple models, the nocturnal boundary layer is generally formulated in terms of eddy diffusivities, which
are functions of height above ground and boundary layer depth. This approach is modified in this study to
include ‘‘z-less’’ turbulence,...
2001-08 (iso8601)
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The predictability of coastal ocean circulation over the central Oregon shelf, a region of strong wind-driven
currents and variable topography, is studied using ensembles of 50-day primitive equation ocean model
simulations with realistic...
2009-08 (iso8601)
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Estimates of three components of an uncertainty budget for a coastal ocean model in a wind-forced regime
are made based on numerical simulations. The budget components behave differently in the shelf regime,
inshore of the 200-m isobath, and the...
2011-03 (iso8601)
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The exchange coefficients for area-averaged surface fluxes can become anomalously large when the large-scale flow is weak and significant fluxes of heat and moisture are driven by mesoscale motions within the averaging or subgrid area. To prevent...
1995-10 (iso8601)
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Tropical intraseasonal variability in the eastern North Pacific during June–September of 2000–03 is
analyzed using satellite and buoy observations. Quick Scatterometer ocean vector winds and the Tropical
Rainfall Measuring Mission (TRMM)...
2007-01 (iso8601)
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In this work the performance of ensembles generated by commonly used methods in a nonlinear system with
multiple attractors is examined. The model used here is a spectral truncation of a barotropic quasigeostrophic
channel model. The system...
2002-09 (iso8601)
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Practical hydrostatic ocean models are often restricted to statically stable configurations by the use of a convective adjustment. A common way to do this is to assign an infinite boat conductivity to the water at a given level if the water column...
1994-11 (iso8601)
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The authors have used a spectral, primitive equation mechanistic model of the stratosphere and mesosphere
to simulate observed stratospheric flow through the winters of 1991–92 and 1994–95 by forcing the model at
100 hPa with observed geopotential...
1998-06 (iso8601)
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A nonlinear 2½-layer reduced gravity primitive equations (PE) ocean model is used to assimilate sea surface
temperature (SST) data from the Tropical Atmosphere–Ocean (TAO) moored buoys in the tropical Pacific. The
aim of this project is to...
2000-06 (iso8601)
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Measurements of surface wind stress by the SeaWinds scatterometer on NASA’s Quick Scatterometer
(QuikSCAT) satellite are analyzed and compared with several different atmospheric model products, from an
operational model and two high-resolution...
2004-08 (iso8601)
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The vertical structure of coastal-trapped disturbances in several idealized models of a stably stratified lower
atmosphere is examined. The vertical structure and phase speeds of the trapped modes depend on the resting
stratification and the...
1999-02 (iso8601)
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A mesoscale model is used to examine the dynamics of northwest flow over the Santa Barbara Channel region.
Three cases are considered, each characterized by typical summertime synoptic conditions, but with differences
in pressure gradient strength...
2001-05 (iso8601)
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The Moderate Resolution Imaging Spectroradiometer (MODIS) aboard the Terra spacecraft contains spectral bands that allow retrieval of solar-induced phytoplankton chlorophyll fluorescence emission radiance. Concurrent airborne laser-induced (and...
2003-05 (iso8601)
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The first seagoing test of a prototype laser/fiber-optic system for in situ detection of ocean chlorophyll fluorescence is described. Radiation at 488 nm originating from a shipboard argon laser was transmitted through 20 of 200-µm core optical...
1989-02 (iso8601)
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Bulk aerodynamic formulas are applied to meteorological data from low-altitude aircraft flights to obtain
observational estimates of the subgrid enhancement of momentum, sensible heat, and latent heat exchange at
the atmospheric–oceanic boundary...
1998-03 (iso8601)
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The horizontal and vertical structure of the mean flow and turbulent fluxes are examined using aircraft
observations taken near a barrier island on the east coast of the United States during offshore flow periods. The
spatial structure is strongly...
2001-05 (iso8601)
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