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Numerical Study of Typhoon upwellingChiang, Chen-jung 04 August 2004 (has links)
Past investigations were mostly concentrated on the upwelling phenomena observed in the coastal region caused by the variations of topography and the influences of monsoon and oceanic currents. These upwelling are the major sources known to form the plankton production in the surface layer. Remote sensing techniques have been developed very fast recent years, more profound phenomena could be observed at the sea surface. The biggest advantage of using satellite-scanning technique is that larger area can be observed than before and have fewer limitations by weather. Short-term upwelling, such as the storm generated upwelling, can be traced. Lin (2003) reported cold sea surface temperature regions along two typhoon tracks from satellite images. Sea surface cyclonic eddies can usually be observed at the region of typhoon where covered with depressions and strong winds. It is often the place where the upwelling also occurred. Snapshot of satellite images also shown plankton in surface water could grow very quickly after the typhoon left, since enough nutrients have been supplied from deep water. Due to the high water temperature and evaporation rate in the SCS, it is a well know region of energetic weathering system where typhoon occurs quite often. In order to quantify the upwelling processes and study the effects of after-typhoon bloom, a set of numerical studies have been carried out since in-situ measurements are nearly impossible to be implemented. A European community model, COHERENS, has been applied to model the hydrodynamics in the SCS. Slight modification of the code has been done in order to introduce the wind and the pressure field inside typhoon using a parametric typhoon model. In this paper, a series of idealized typhoon cases have been designed, i.e. using various depths, wind intensities and the speed of moving, to identify the influences to vertical structure of the sea water. Simulation of a real case, typhoon Kai-Tai occurred from 6 July to 10 July 2000, will also presented. The model domain is from 3¢XN to 29¢XN and 99¢XE to 125¢XE with a resolution of 1/6 degree. Cold-water upwelling can be observed from the model results.
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Improving wind-based upwelling estimates off the west coasts of North and South America /Pickett, Mark H. January 2003 (has links) (PDF)
Thesis (Ph. D.)--Naval Postgraduate School, December 2003. / Dissertation supervisors: Curtis A. Collins, Franklin B. Schwing. Includes bibliographical references (p. 95-108). Also available online.
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Monitoring coastal upwelling by measuring its effects within an estuaryBourke, Robert H. 07 August 1968 (has links)
Temperature, salinity, and dissolved oxygen concentration
measured in an estuary were analyzed to determine if the effects of
coastal upwelling could be observed and used to effectively monitor
the degree of upwelling.
Hydrographic data collected weekly at a point four miles from
the entrance of Yaquina Bay (Buoy 15) were analyzed for their applicability as indicators of coastal upwelling. Only data collected during
the known upwelling season off Oregon of May through October were
considered. Low temperature, low dissolved oxygen concentration,
and high salinity occurred when the wind was strongly from the north--
conditions expected during times of active upwelling.
A regression analysis was performed to establish the relationship
between water temperature and wind velocity averaged over a three
day period. The two were significantly related. Various weighting
schemes were applied to the wind observations to obtain an average
wind which would provide the best correlation between wind and
temperature. A wind averaged over four days and weighted heaviest
during the third 24 hour period prior to the temperature observation
resulted in the best correlation.
A prediction model was formulated to allow for the prediction of
water temperature 24 hours in advance based upon the known wind
field during times of active upwelling.
Comparisons of temperature and salinity from five miles off
the coast with that in the estuary established that the upwelled water
entering the estuary on the flood tide originated from a depth of about
20 meters at three-five miles off the coast.
Measuring the temperature, salinity, and oxygen concentration
of the bottom water near the mouth of an estuary does provide an
effective, reliable, and simple method of monitoring the stage of
upwelling occurring outside the estuary. / Graduation date: 1969
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On the physical characteristics of upwelling events off Oregon and Peru / On physical characteristics of upwelling events off Oregon and PeruFonseca, Tomas Rodrigo 20 August 1981 (has links)
Graduation date: 1982
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Particle size distributions and the vertical distribution of suspended matter in the upwelling region off OregonKitchen, James C. 27 July 1977 (has links)
Graduation date: 1978
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Modeling upwelling circulation over continental shelf in the northern South China sea /Cheung, Yee Ying. January 2006 (has links)
Thesis (M.Phil.)--Hong Kong University of Science and Technology, 2006. / Includes bibliographical references (leaves 103-108). Also available in electronic version.
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Observational and modeling studies of the Juan de Fuca Eddy : a mesoscale, topographically-linked upwelling eddy in the northern California Current system /MacFadyen, Amoreena. January 2008 (has links)
Thesis (Ph. D.)--University of Washington, 2008. / Vita. Includes bibliographical references (leaves 100-107).
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Observations and modeling of currents within the Monterey Bay during May 1988Koehler, Kim A. January 1990 (has links)
Thesis (M.S. in Meteorology and Physical Oceanography)--Naval Postgraduate School, June 1990. / Thesis Advisor(s): Ramp, Steven R. Second Reader: Smith, David C. "June 1990." Description based on title screen as viewed on 20 October 2009. DTIC Identifier(s): Ocean currents, ocean circulation, Pacific Ocean, Monterey Bay (California), Monterey submarine canyon, oceanographic data, ADCP (Acoustic Doppler Current Profiler), meteorological data, air water interactions, mean flow, theses. Author(s) subject terms: Monterey Bay, currents, observations, modeling, upwelling. Includes bibliographical references (p. 103-107). Also available in print.
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Observations and modeling of currents within the Monterey Bay during May 1988Koehler, Kim A. January 1990 (has links)
Thesis (M.S. in Meteorology and Physical Oceanography)--Naval Postgraduate School, June 1990. / Thesis Advisor(s): Ramp, Steven R. Second Reader: Smith, David C. "June 1990." Description based on title screen as viewed on 20 October 2009. DTIC Identifier(s): Ocean currents, ocean circulation, Pacific Ocean, Monterey Bay (California), Monterey submarine canyon, oceanographic data, ADCP (Acoustic Doppler Current Profiler), meteorological data, air water interactions, mean flow, theses. Author(s) subject terms: Monterey Bay, currents, observations, modeling, upwelling. Includes bibliographical references (p. 103-107).
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A numerical study of basic coastal upwelling processesLi, Z. January 1989 (has links)
No description available.
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