rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Free-air gravity and geoid anomalies of the North Atlantic Ocean and their tectonic implications
  name:
    name part: Jung, Woo-Yeol.
    role:
      role term: creator
  name:
    name part: Bryant, Davis A.
    role:
      role term: degree committee member.
  name:
    name part: Carlson, Richard L.
    role:
      role term: degree committee member.
  name:
    name part: Fahlquist, Davis A.
    role:
      role term: degree committee member.
  name:
    name part: Hilde, Thomas W. C.
    role:
      role term: degree committee member.
  name:
    name part: Rabinowitz, Philip D.
    role:
      role term: degree supervisor.
  name:
    name part: Texas A & M University
    role:
      role term: degree granting institution.
  type of resource: text
  genre: bibliography
  genre: Academic theses
  origin info:
    place:
      place term: xx
    date issued: 1985
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    extent: xiv, 166 leaves : illustrations, maps ; 29 cm
  abstract: A free-air gravity anomaly map of the North Atlantic Ocean has been constructed at a 10 mgal contour interval utilizing all available surface ship and pendulum gravity measurements. The map shows values more positive to the north of ~32°N than to the south and values more negative in the western North Atlantic Ocean basin than in the eastern basin. The Mid-Atlantic Ridge area and topographic highs such as volcanic islands, seamounts are associated with positive values while the rift valley and fracture zone valleys are characterized by elongated negative values. The seaward edge of the continental shelf is characterized by a belt of positive free-air gravity anomalies; negative gravity values are observed just seaward of the continental slope and rise. A total of 3032 1x1° averaged free-air gravity anomalies were determined from the surface ship gravity map. A gravimetric geoid was computed from these 1x1° averaged gravity anomalies by employing Stokes' integral theorem. Comparisons were made between the 1x1° surface ship gravity and the 1x1° SEASAT altimeter derived gravity as well as the 1x1° surface ship gravimetric geoid and the 1x1° SEASAT altimeter derived geoid. The results show very good agreement in contour trends, wavelengths and amplitudes. Two types of residual geoids were computed. The first was obtained by subtracting the long wavelength features (degree 10 geoid of GEM10 standard earth model) from the 1x1° averaged SEASAT altimeter derived geoid. The second was obtained by further subtracting the geoid variations relating to the cooling of the plates. The Azores residual geoid high which centered over the Azores triple junction when only the long wavelength features were removed shifts its center east to the Azores Island after thermal effects were accounted for. This may indicate that the main axis of smaller scale (upper 600 km) convective upwellings does not lie beneath the present day spreading center but beneath the Azores Islands. Areas of exten…
  note: "Major subject: Oceanography."
  note: Two maps on folded leaves in pocket.
  note: Typescript (photocopy).
  note: Vita.
  note: Ph. D. Texas A & M University 1985
  note: Includes bibliographical references (leaves 150-165).
  subject:
    geographic code: l------
  subject:
    topic: Gravity anomalies
    geographic: North Atlantic Ocean
  subject:
    topic: Marine geophysics
    geographic: North Atlantic Ocean
  subject:
    topic: Major oceanography
  subject:
    topic: Gravity anomalies
  subject:
    topic: Marine geophysics
  subject:
    geographic: North Atlantic Ocean
  identifier: http://proxy.library.tamu.edu/login
  identifier: https://hdl.handle.net/1969.1/DISSERTATIONS-451549
  identifier: http://gateway.proquest.com/openurl
  related item:
    location:
      url: http://proxy.library.tamu.edu/login
  related item:
    location:
      url: https://hdl.handle.net/1969.1/DISSERTATIONS-451549
  related item:
    location:
      url: http://gateway.proquest.com/openurl
  record info:
    record content source: TXA
    record creation date: 870519
    record change date: 20220103135024.0
    record identifier: in00000434844
    language of cataloging:
      language term: eng