Skip to main content
padlock icon - secure page this page is secure

Free Content Tidal period upwelling within Raine Island Entrance Great Barrier Reef

Download Article:
(PDF 1,416.5 kb)
Temperature and current measurements collected from November 1981 to May 1982 at the head of Raine Island Entrance reveal tidally-induced upwelling of cold continental slope water onto the continental shelf. Daily tidal motions account for approximately 80% of the total cross-shelf eddy heat flux of 0.79 ± 1.01 cal cm−2 s−1. Although temperature and current fluctuations are principally of semidiurnal period, the heat flux is principally at diurnal period. Based on empirical nutrient-temperature relations we estimate the onshore inorganic nutrient fluxes to be 0.9 (±1.2) × 10−2 mmol m−2 s−1 for nitrate, 0.6 (±0.8) × 10−2 mmol m−2 s−1 for silicate and 0.7 (±0.9) × 10−3 mmol m−2 s−1 for phosphate.

The upwelling is explained in terms of fluid withdrawal-type mechanisms in which nutrient-rich thermocline water below 100 m depth is drawn onto the shallow (40 m) shelf during the flood. We suggest that this tidal period inundation of the outer reefs is an important mechanism for effectively upgrading nominally low nutrient levels. Reef growth is expected to be most prolific near the shelf break where the time-integrated contribution of the upwelling is greatest.

6 References.

No Supplementary Data.
No Article Media
No Metrics

Document Type: Research Article

Publication date: November 1, 1984

More about this publication?
  • The Journal of Marine Research, one of the oldest journals in American marine science, publishes peer-reviewed research articles covering a broad array of topics in physical, biological and chemical oceanography. Articles that deal with processes, as well as those that report significant observations, are welcome. Biological studies involving coupling between ecological and physical processes are preferred over those that report systematics. The editors strive always to serve authors and readers in the academic oceanographic community by publishing papers vital to the marine research in the long and rich tradition of the Sears Foundation for Marine Research. We welcome you to the Journal of Marine Research.
  • Editorial Board
  • Information for Authors
  • Subscribe to this Title
  • Purchase The Sea
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more