Dinámica atmosférica y oceánica en algunos sitios del Área de Conservación Guanacaste (ACG), Costa Rica
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Lizano Rodríguez, Omar Gerardo
Alfaro Martínez, Eric J.
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Universidad de Costa Rica
Abstract
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Se estudiaron las condiciones oceanográficas y meteorológicas en cuatro regiones relacionadas con parques nacionales en el Área de Conservación Guanacaste. Parámetros como temperatura, salinidad y oxígeno disuelto se estudiaron a través de la columna de agua en al menos un ciclo de marea en las bahías Tamarindo, Culebra, Santa Elena en el Pacífico Norte de Costa Rica, y en Bahía Ballena en la parte externa del Golfo de Nicoya. Al mismo tiempo se midieron corrientes marinas y viento local, de manera que se pudieran evaluar las fuerzas dinámicas en estos sitios. Se consultaron variables ambientales desde fuentes de datos operacionales alrededor de Costa Rica, como las corrientes marinas superficiales y el patrón de viento al frente de esta región, para conocer las condiciones prevalecientes y su relación con la dinámica de las variables medidas en cada sitio. Se encontró que cuando el viento sopla fuerte sobre esta zona, una condición típica de la época seca en el Pacífico Norte de Costa Rica, las corrientes marinas son intensas al frente de la Península de Nicoya. Esta es una característica coherente con las condiciones oceanográficas existentes cuando estos vientos se generan mar adentro al frente del Golfo de Papagayo. Estas fuerzas externas influencian la circulación de bahías abiertas sobre esta región, como en la Bahía de Tamarindo. El viento local y la marea son componentes que modulan la circulación local, especialmente en bahías muy cerradas como la Bahía de Santa Elena y Bahía Ballena. La estructura de la capa de agua en Bahía Ballena muestra una estratificación de corrientes, evidenciando una condición estuarina típica de la presencia de diferentes campos termohalinos dominados por las fuerzas de marea.
We studied the oceanographic and meteorological conditions in four sites related to national parks in the Área de Conservación Guanacaste. Variables such as temperature, salinity and dissolved oxygen were studied through the water column in at least one tidal cycle at three bays Tamarindo, Culebra, Santa Elena located in the North Pacific of Costa Rica, and in Ballena Bay, off the Gulf of Nicoya. At the same time, local wind and ocean currents were measured in order to evaluate the dynamic forces at these sites. Environmental variables around Costa Rica were consulted from operational data sources, such as ocean currents and surface wind patterns, to know the prevailing conditions and their influence. During strong trade winds, a typical dry season condition, strong ocean currents are generated in front of the Nicoya Peninsula. This is consistent with the prevailing oceanographic conditions offshore Papagayo Gulf when the wind jet is established. These external forces influence the ocean circulation of open water bays, as was observed in Tamarindo Bay. The local wind and tide are components that modulate local circulation, especially in closed bays like Santa Elena and Ballena. The stratified current structure of the water layers in Ballena Bay showed a typical estuarine condition with the presence of different thermohaline fields dominated by tidal forces. Rev. Biol. Trop. 62 (Suppl. 4): 17-31. Epub 2014 Diciembre 01.
We studied the oceanographic and meteorological conditions in four sites related to national parks in the Área de Conservación Guanacaste. Variables such as temperature, salinity and dissolved oxygen were studied through the water column in at least one tidal cycle at three bays Tamarindo, Culebra, Santa Elena located in the North Pacific of Costa Rica, and in Ballena Bay, off the Gulf of Nicoya. At the same time, local wind and ocean currents were measured in order to evaluate the dynamic forces at these sites. Environmental variables around Costa Rica were consulted from operational data sources, such as ocean currents and surface wind patterns, to know the prevailing conditions and their influence. During strong trade winds, a typical dry season condition, strong ocean currents are generated in front of the Nicoya Peninsula. This is consistent with the prevailing oceanographic conditions offshore Papagayo Gulf when the wind jet is established. These external forces influence the ocean circulation of open water bays, as was observed in Tamarindo Bay. The local wind and tide are components that modulate local circulation, especially in closed bays like Santa Elena and Ballena. The stratified current structure of the water layers in Ballena Bay showed a typical estuarine condition with the presence of different thermohaline fields dominated by tidal forces. Rev. Biol. Trop. 62 (Suppl. 4): 17-31. Epub 2014 Diciembre 01.
Keywords
dinámica atmosférica, temperatura del mar, oxígeno disuelto, circulación de estuarios, Área de Conservación Guanacaste, atmospheric dynamic, sea temperature, dissolved oxygen, estuarine circulation, Área de Conservación Guanacaste, 551.470 1 Corrientes oceánicas