On the circulation in the Puerto Morelos fringing reef lagoon |
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Authors: | C Coronado J Candela R Iglesias-Prieto J Sheinbaum M López F J Ocampo-Torres |
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Institution: | (1) Departamento de Oceanografía Física, División de Oceanología, Centro de Investigación Científica y de Educación Superior de Ensenada, Km 107 Carretera Tijuana-Ensenada, Ensenada, Baja California, 22860, México;(2) Unidad Académica Puerto Morelos, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Apdo. Postal 1152, Cancún, Quintana Roo, 77500, México |
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Abstract: | For a period of 22 months beginning in September 2003, an array of four current profilers were deployed on the Puerto Morelos
fringing reef lagoon, a microtidal Caribbean environment characterised by the influence of the Yucatan Current (YC) and a
Trade Wind regime. The dataset includes water currents, bottom pressure, and surface waves complemented with coastal meteorological
data and surface currents from an acoustic Doppler current profiler moored 12 km offshore. Normal circulation conditions consisted
of a surface wave-induced flow entering the lagoon over a shallow reef flat and strong flows exiting through northern and
southern channels. This wave induced flow was modulated by a low-frequency sea level change related to a geostrophic response
to the YC variability offshore, with tidal and direct wind forcing playing additional minor roles. Under extended summer low-wave
height conditions, together with a decrease in sea level from the intensification of the offshore current, the exchange of
the lagoon with the adjacent ocean was drastically reduced. Under normal wave conditions (H
S = 0.8 ± 0.4 m, mean ± SD), water residence time was on average 3 h, whereas during Hurricane Ivan’s extreme swell (H
S = 6 m) it decreased to 0.35 h. |
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Keywords: | Fringing reef lagoon Hydrodynamics Surface waves Residence time Along shore current modulation |
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