Skip to main content

Behavior of a wave-driven buoyant surface jet on a coral reef

Publication ,  Journal Article
Herdman, LMM; Hench, JL; Fringer, O; Monismith, SG
Published in: Journal of Geophysical Research: Oceans
May 1, 2017

A wave-driven surface-buoyant jet exiting a coral reef was studied in order to quantify the amount of water reentrained over the reef crest. Both moored observations and Lagrangian drifters were used to study the fate of the buoyant jet. To investigate in detail the effects of buoyancy and alongshore flow variations, we developed an idealized numerical model of the system. Consistent with previous work, the ratio of alongshore velocity to jet velocity and the jet internal Froude number were found to be important determinants of the fate of the jet. In the absence of buoyancy, the entrainment of fluid at the reef crest creates a significant amount of retention, keeping 60% of water in the reef system. However, when the jet is lighter than the ambient ocean water, the net effect of buoyancy is to enhance the separation of the jet from shore, leading to a greater export of reef water. Matching observations, our modeling predicts that buoyancy limits retention to 30% of the jet flow for conditions existing on the Moorea reef. Overall, the combination of observations and modeling we present here shows that reef-ocean temperature gradients can play an important role in reef-ocean exchanges.

Duke Scholars

Altmetric Attention Stats
Dimensions Citation Stats

Published In

Journal of Geophysical Research: Oceans

DOI

EISSN

2169-9291

ISSN

2169-9275

Publication Date

May 1, 2017

Volume

122

Issue

5

Start / End Page

4088 / 4109

Related Subject Headings

  • 3709 Physical geography and environmental geoscience
  • 3708 Oceanography
  • 3706 Geophysics
  • 0406 Physical Geography and Environmental Geoscience
  • 0405 Oceanography
  • 0404 Geophysics
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Herdman, L. M. M., Hench, J. L., Fringer, O., & Monismith, S. G. (2017). Behavior of a wave-driven buoyant surface jet on a coral reef. Journal of Geophysical Research: Oceans, 122(5), 4088–4109. https://doi.org/10.1002/2016JC011729
Herdman, L. M. M., J. L. Hench, O. Fringer, and S. G. Monismith. “Behavior of a wave-driven buoyant surface jet on a coral reef.” Journal of Geophysical Research: Oceans 122, no. 5 (May 1, 2017): 4088–4109. https://doi.org/10.1002/2016JC011729.
Herdman LMM, Hench JL, Fringer O, Monismith SG. Behavior of a wave-driven buoyant surface jet on a coral reef. Journal of Geophysical Research: Oceans. 2017 May 1;122(5):4088–109.
Herdman, L. M. M., et al. “Behavior of a wave-driven buoyant surface jet on a coral reef.” Journal of Geophysical Research: Oceans, vol. 122, no. 5, May 2017, pp. 4088–109. Scopus, doi:10.1002/2016JC011729.
Herdman LMM, Hench JL, Fringer O, Monismith SG. Behavior of a wave-driven buoyant surface jet on a coral reef. Journal of Geophysical Research: Oceans. 2017 May 1;122(5):4088–4109.

Published In

Journal of Geophysical Research: Oceans

DOI

EISSN

2169-9291

ISSN

2169-9275

Publication Date

May 1, 2017

Volume

122

Issue

5

Start / End Page

4088 / 4109

Related Subject Headings

  • 3709 Physical geography and environmental geoscience
  • 3708 Oceanography
  • 3706 Geophysics
  • 0406 Physical Geography and Environmental Geoscience
  • 0405 Oceanography
  • 0404 Geophysics