Oregon inlet: Hydrodynamics, volumetric flux and implications for larval fish transport

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Description

The temporal response of Oregon Inlet currents to atmospheric forcing and sea level fluctuations is analyzed using time and frequency domain analysis. Temporally persistent and spatially extensive ebb and flood events are identified using data sets from both within and outside of Oregon Inlet. Prism estimates are made to generate a time series of volumetric flux of water transported through the inlet. Water masses flooding into the Pamlico Sound via Oregon Inlet are identified in temperature (T) and salinity (S) space to determine their source of origin. Correlations are examined between the atmospheric wind field, the main axial slope of ... continued below

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Medium: P; Size: 45 p.

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Nichols, C.R. & Pietrafesa, L.J. May 1, 1997.

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  • Nichols, C.R. National Oceanic and Atmospheric Administration, Silver Springs, MD (United States)
  • Pietrafesa, L.J. North Carolina State Univ., Raleigh, NC (United States). Department of Marine, Earth and Atmospheric Sciences

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Description

The temporal response of Oregon Inlet currents to atmospheric forcing and sea level fluctuations is analyzed using time and frequency domain analysis. Temporally persistent and spatially extensive ebb and flood events are identified using data sets from both within and outside of Oregon Inlet. Prism estimates are made to generate a time series of volumetric flux of water transported through the inlet. Water masses flooding into the Pamlico Sound via Oregon Inlet are identified in temperature (T) and salinity (S) space to determine their source of origin. Correlations are examined between the atmospheric wind field, the main axial slope of the inlet`s water level, inlet flow and T, S properties. Synoptic scale atmospheric wind events are found to dramatically and directly affect the transport of water towards (away from) the inlet on the ocean side, in concert with the contemporaneous transport away from (towards) the inlet on the estuary side, and a subsequent flooding into (out of) the estuary via Oregon Inlet. Thus, while astronomical tidal flooding and ebbing events are shown to be one-sided as coastal waters either set-up or set-down, synoptic scale wind events are shown to be manifested as a two-sided in-phase response set-up and set-down inside and outside the inlet, and thus are extremely effective in driving currents through the inlet. These subinertial frequency flood events are believed to be essential for both the recruitment and subsequent retention of estuarine dependent larval fish from the coastal ocean into Pamlico Sound. Year class strength of these finish may be determined annually by the relative strength and timing of these climatological wind events.

Physical Description

Medium: P; Size: 45 p.

Notes

OSTI as DE97006109

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  • Other Information: PBD: [1997]

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  • Other: DE97006109
  • Report No.: DOE/ER/61425--T3
  • Grant Number: FG02-92ER61425;FG09-85ER60376
  • DOI: 10.2172/479074 | External Link
  • Office of Scientific & Technical Information Report Number: 479074
  • Archival Resource Key: ark:/67531/metadc675604

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  • May 1, 1997

Added to The UNT Digital Library

  • July 25, 2015, 2:21 a.m.

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  • Nov. 6, 2015, 4:13 p.m.

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Nichols, C.R. & Pietrafesa, L.J. Oregon inlet: Hydrodynamics, volumetric flux and implications for larval fish transport, report, May 1, 1997; United States. (digital.library.unt.edu/ark:/67531/metadc675604/: accessed June 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.