Dispersion in the Yucatan coastal zone: Implications for red tide events

Enríquez, Cecilia; Mariño‐Tapia, Ismael; Herrera-Silveira, Jorge A.

doi:10.1016/j.csr.2009.10.005

Cited by 102 publications

(77 citation statements)

References 15 publications

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“…15 m s 21 ) northerly winds (Nortes) generated by cold fronts disrupt the Trade Wind patterns during the winter. The Trade Winds reinforce the persistent westward to northwestward coastal drift over a wide (< 200 km) shelf of slope 1/1000 (Enriquez et al 2010), while the strong northerly winds may interrupt the coastal drift.…”

Section: Methodsmentioning

confidence: 99%

Tidal variability of salinity and velocity fields related to intense point‐source submarine groundwater discharges into the coastal ocean

Valle‐Levinson

Mariño‐Tapia

Enríquez

et al. 2011

Limnology & Oceanography

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Velocity and hydrography measurements were used to determine the tidal variability and detailed structure of an intense (< 43,200 m 3 d 21 ) point-source submarine groundwater discharge from a spring located in the coastal ocean of the Yucatá n peninsula, Mexico. Measurements were obtained during a dry season with a combination of towed, profiling, and fixed instrumentation. The goal of these observations was to understand the effects of tides on the velocity and salinity structure of the water column that determine mixing and dispersion processes at spatial scales from meters to kilometers. Tidally averaged flows were characterized by an upward jet flanked by asymmetric downdrafts. The asymmetry was caused by a < 0.1 m s 21 ambient horizontal flow and by the < 40u angle (relative to the vertical) of discharge. The spatially averaged salinity distributions exhibited lowest values at low tides and highest values at high tides. This was attributed to tidal variations of hydrostatic pressure acting on the spring outflow, which allowed , 1 m s 21 vertical flows at low tides and , 0.05 m s 21 vertical velocities at high tides. The vertical momentum balance consisted of upward accelerations produced by buoyancy and inertia from the spring and downward accelerations from gravity. On the basis of this balance and of energetic considerations, the vertical extent of the spring discharge likely depends on the density contrast between ambient and discharge waters (buoyancy forces), the upward speed of the spring (inertia forces), and the depth of the water column (hydrostatic pressure force), all of which vary with tides.

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Section: Methodsmentioning

confidence: 99%

Tidal variability of salinity and velocity fields related to intense point‐source submarine groundwater discharges into the coastal ocean

Valle‐Levinson

Mariño‐Tapia

Enríquez

et al. 2011

Limnology & Oceanography

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“…1). The coastline is fronted by a 200 km wide continental shelf with a very mild (1 : 1000) beach slope (Enriquez et al, 2010). The tidal regime is micro-tidal and wave conditions in the study area are dominated by local sea breezes and mesoscale meteorological events (cold fronts) known as Nortes .…”

Section: Study Areamentioning

confidence: 99%

Run-up parameterization and beach vulnerability assessment on a barrier island: a downscaling approach

Medellín

Brinkkemper

Torres-Freyermuth

et al. 2016

Nat. Hazards Earth Syst. Sci.

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Abstract. We present a downscaling approach for the study of wave-induced extreme water levels at a location on a barrier island in Yucatán (Mexico). Wave information from a 30-year wave hindcast is validated with in situ measurements at 8 m water depth. The maximum dissimilarity algorithm is employed for the selection of 600 representative cases, encompassing different combinations of wave characteristics and tidal level. The selected cases are propagated from 8 m water depth to the shore using the coupling of a third-generation wave model and a phase-resolving nonhydrostatic nonlinear shallow-water equation model. Extreme wave run-up, R 2 % , is estimated for the simulated cases and can be further employed to reconstruct the 30-year time series using an interpolation algorithm. Downscaling results show run-up saturation during more energetic wave conditions and modulation owing to tides. The latter suggests that the R 2 % can be parameterized using a hyperbolic-like formulation with dependency on both wave height and tidal level. The new parametric formulation is in agreement with the downscaling results (r 2 = 0.78), allowing a fast calculation of wave-induced extreme water levels at this location. Finally, an assessment of beach vulnerability to wave-induced extreme water levels is conducted at the study area by employing the two approaches (reconstruction/parameterization) and a storm impact scale. The 30-year extreme water level hindcast allows the calculation of beach vulnerability as a function of return periods. It is shown that the downscaling-derived parameterization provides reasonable results as compared with the numerical approach. This methodology can be extended to other locations and can be further improved by incorporating the storm surge contributions to the extreme water level.

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“…Este tipo de asociaciones ya había sido reportado por Tróccoli-Ghinaglia (2001) y Álvarez-Góngora (2003), quienes mencionan que estas especies son consideradas como indicadores de ambos componentes en la costa de Yucatán. Complementado con resultados de los trabajos realizados por HerreraSilveira & Morales-Ojeda (2009) y Enríquez et al (2010), se ha llegado a la conclusión que la presencia de estas especies nocivas y su asociación a los componentes antes mencionados, favorecen a corto y largo plazo, la presencia más frecuente de proliferaciones algales y su dispersión hacia otros puntos de la zona costera donde no se han registrado actualmente. Incluso las proliferaciones marinas ocasionadas periódicamente por S. trochoidea en el área de Dzilam-Holbox-Cabo Catoche, se ven favorecidas por la Corriente de Yucatán y la surgencia de Cabo Catoche, lo cual ha sido reportado recientemente por Enríquez et al (2010) y de cómo su dispersión en la plataforma yucateca depende del ángulo con que entra la corriente por el Canal de Yucatán.…”

Section: Pyrodinium Bahamense Plate X Xunclassified

“…Estos sistemas costeros en particular, son vulnerables a la eutrofización debido a la porosidad y alto grado de permeabilidad, lo cual favorece la filtración al acuífero rápidamente, contaminándolo y teniendo como destino final las aguas de la zona costera (Tróccoli-Ghinaglia 2001, García-Solsona et al 2010. Para el área de Yucatán existen estudios relacionados con la calidad del agua, vegetación sumergida y fitoplancton (Álvarez-Góngora 2001, Tróccoli-Ghinaglia 2001, Aguayo-González 2003, Álvarez-Góngora 2003, Capurro 2003, Aranda-Cirerol 2004, Tróccoli-Ghinaglia et al 2004, Álvarez-Góngora & Herrera-Silveira 2006, Herrera-Silveira 2006, Herrera-Silveira & Morales-Ojeda 2009) y en los últimos dos años se ha incorporado al monitoreo de la región el estudio de las corrientes y su relación con la dispersión de las proliferaciones algales (Enríquez et al 2010). Estos estudios han servido como línea de base en el entendimiento de la variabilidad espacial y temporal del ambiente costero.…”

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Variaciones estacionales de la estructura comunitaria del fitoplancton en zonas de descarga de agua subterránea en la costa norte de la Península de Yucatán

Álvarez-Góngora¹,

Liceaga-Correa²,

Herrera-Silveira³

2012

RBT

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Seasonal variations of community structures phytoplankton in groundwater discharge areas along the Northern Yucatán Peninsula coast. The highly touristic Yucatán Peninsula is principally constituted with coastal marine environments. Like other coastal areas, this has been affected by the increase of waste water discharge, hydrological modifications and land use changes in the area. The phytoplankton community structure is one of the main components of coastal ecosystems and the most affected in hydrological processes. In order to follow the seasonal variations, the phytoplankton was characterized to follow the hydrological variability in two sites (Dzilam and Progreso) of the Northern Yucatán Peninsula. For this, cruises were carried out monthly during one year, from April 2004 to March 2005, with two samplings per season (dry, rainy and "nortes"). Hydrological variability was associated with seasonality and directly linked to groundwater discharges in the Dzilam area, and waste water discharges in the Progreso area. The highest nutrient concentrations occurred mainly during the rainy season. The phytoplankton community changes observed throughout the year suggested that the hydrological and chemical variability associated with seasonality and anthropogenic impacts have a strong influence. The substitution of diatoms by dinoflagellates as the dominant group in Progreso was the result of seasonal variability itself, but also could have been caused by eutrophic processes; while in Dzilam, the major presence of diatoms could have been favored by groundwater discharges. The results of this study can be used to understand the linkages between stressors from the anthropogenic activities and coastal water quality and changes. Rev. Biol. Trop. 60 (1): 157-172. Epub 2012 March 01.

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Dispersion in the Yucatan coastal zone: Implications for red tide events

Cited by 102 publications

References 15 publications

Tidal variability of salinity and velocity fields related to intense point‐source submarine groundwater discharges into the coastal ocean

Tidal variability of salinity and velocity fields related to intense point‐source submarine groundwater discharges into the coastal ocean

Run-up parameterization and beach vulnerability assessment on a barrier island: a downscaling approach

Variaciones estacionales de la estructura comunitaria del fitoplancton en zonas de descarga de agua subterránea en la costa norte de la Península de Yucatán

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