Predictable Upwelling and the Shoreward Transport of Planktonic Larvae by Internal Tidal Bores

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Science  02 Aug 1991:
Vol. 253, Issue 5019, pp. 548-549
DOI: 10.1126/science.253.5019.548


Internal tidal bores have a crucial role in the transport of drifting larvae to marine nearshore populations, a key factor in structuring benthic communities. Shoreward transport of larvae and abrupt surface temperature drops lasting days can be explained by invoking the advection of subsurface cold water to the shore by internal tidal bores. This process is predictable within the lunar cycle and brings deep water to the surface (upwelling) in a direction perpendicular to the coastline.