Demonstration of a nowcast/forecast system for Galveston Bay

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dc.acquisition-srcDownloaded from-Engineering Village 2en_US
dc.call-noen_US
dc.contract-noen_US
dc.contributor.authorSchmalz RAJen_US
dc.contributor.otheren_US
dc.date.accessioned2010-02-15T17:16:26Z
dc.date.available2010-02-15T17:16:26Z
dc.date.issued2000en_US
dc.degreeen_US
dc.description868-883en_US
dc.description-otheren_US
dc.description.abstractThe National Oceanic and Atmospheric Administration installed a Physical Oceanographic Real Time System (PORTS) in June 1996 in Galveston Bay. Water surface elevation, currents at prediction depth (4.6m below MLLW) as well as near-surface and near-bottom temperature and salinity, and meteorological information are available at six-minute intervals. To complement the PORTS a nowcast/forecast system was initially developed over the Bay using a modified version of the Blumberg-Mellor (1987) three-dimensional hydrodynamic model. The Bay model was used to provide boundary conditions for a one-way coupled, fine resolution Houston Ship Channel model (Schmalz, 1998a). The nowcast component has recently been revised to work directly from the PORTS universal flat file format (PUFFF) files rather than from the PORTS data screen. During the forecast, the National Weather Service's Aviation Atmospheric and Extratropical Storm Surge Forecast Models are used to provide the meteorological and Gulf of Mexico subtidal water level forcings, respectively. The results are presented for a one-month demonstration period, 9 April through 9 May 1999, during which daily 24-hour nowcasts and 36-hour forecasts were performed using both bay and channel models in a pseudo-operational setting. The nowcast and forecast are separately evaluated for water levels, currents, salinity, and temperature. Evaluations of forecast Gulf of Mexico subtidal water level, freshwater inflows, and wind and sea level atmospheric pressure are also considered. Results are summarized and contrasted with a previous one-month evaluation during September 1997 (Schmalz, 1998c). To seek improvement, a pseudo-operational test-bed was developed and several tests performed. An assessment of improvement is made over the first week of June 1999. Finally, plans for additional demonstration periods and system developments are discusseden_US
dc.description.urihttp://gbic.tamug.edu/request.htmen_US
dc.historyen_US
dc.identifier.urihttp://hdl.handle.net/1969.3/23350
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dc.locationen_US
dc.longitudeen_US
dc.notesCompilation and indexing terms, Copyright 2004 Elsevier Engineering Information, Incen_US
dc.placeen_US
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dc.relation.ispartofseries50954.00en_US
dc.relation.urien_US
dc.scaleen_US
dc.seriesen_US
dc.subjectAtmospheric pressureen_US
dc.subjectAtmospheric temperatureen_US
dc.subjectFlow of wateren_US
dc.subjectHydrodynamicsen_US
dc.subjectMathematical modelsen_US
dc.subjectMeteorologyen_US
dc.subjectOcean currentsen_US
dc.subjectOceanographyen_US
dc.subjectReal time systemsen_US
dc.subjectSalinity measurementen_US
dc.subjectSocieties and institutionsen_US
dc.subjectSurface watersen_US
dc.subjectThree dimensionalen_US
dc.subjectWateren_US
dc.subjectWater levelsen_US
dc.titleDemonstration of a nowcast/forecast system for Galveston Bayen_US
dc.typeJournalen_US
dc.universityen_US
dc.vol-issue()en_US

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Galveston Bay Bibliography
GBIC Abstracts (full text not available through Jack K. Williams Library)