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Internal swash and surf.

K O Emery1, C G Gunnerson

  • 1Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543.

Proceedings of the National Academy of Sciences of the United States of America
|August 1, 1973
PubMed
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Internal waves near Santa Monica Bay undergo significant changes when encountering the continental shelf. These alterations include internal swash and internal surf phenomena, impacting water temperature distribution near the seabed.

Area of Science:

  • Physical Oceanography
  • Coastal Dynamics
  • Marine Geophysics

Background:

  • Internal waves are common oceanic phenomena influenced by various factors.
  • Continental shelf environments present unique conditions affecting wave behavior.
  • Understanding wave alteration is crucial for coastal processes and marine ecosystems.

Purpose of the Study:

  • To investigate the transformation of internal waves on a shoaling continental shelf.
  • To characterize the specific forms of alteration, namely internal swash and internal surf.

Main Methods:

  • Analysis of 114 temperature sections, each with approximately 10 bathythermograms.
  • Observation of internal wave behavior across the continental shelf in Santa Monica Bay.

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Main Results:

  • Internal waves commonly alter upon crossing the shoaling continental shelf.
  • Observed alterations include 'internal swash,' where isotherms extend further landward.
  • 'Internal surf' was identified, characterized by temperature inversions and complex isotherm variations near the bottom.

Conclusions:

  • The continental shelf significantly modifies internal wave dynamics.
  • Internal swash and surf are key processes altering thermal structure in coastal waters.
  • These findings enhance our understanding of coastal oceanographic processes.