Modelo de estimación de viento para Bahía Coliumo, Chile Central
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Date
Authors
Calliari, Danilo
Alfaro Martínez, Eric J.
Journal Title
Journal ISSN
Volume Title
Publisher
Gayana Oceanológica, volumen 5, número 2, 1997
Abstract
Las surgencias costeras en la costa de Chile central son causadas por la interacción entre el patrón de vientos dominante y la topografía local. En consecuencia, para interpretar los procesos oceanográficos costeros es sumamente útil contar con una buena medida o estimación de las componentes del viento local. Partiendo de series horarias, se construyó un modelo para estimar las componentes meridional (norte-sur) y zonal (este-oeste) del viento en Bahía Coliumo (36°32' S; 72°57'W), a partir del viento medido en la estación Bellavista (36°47' S; 73°07' W, Concepción) como variable independiente. Los modelos propuestos son: Uc(i)=0.280+0.200Ubv (i)+0.156 V¡",(i)+E¡Ci), Vc(i)= -0,460+0.253 U".,(i)+0.839 V",,(i)+E/i), para las componentes meridional y zonal, respectivamente. Estos modelos bivariados produjeron mejores estimaciones que los modelos con una sola de las componentes como variable independiente. La componente meridional fue con la cual se obtuvo la mejor correlación entre las series originales y la que presentó menor error en la estimación. Ello es de articular interés ya que dicha componente es la causante de las surgencias costeras.
Coastal upwellings off Central Chile are caused by the combined effect of the redominating wind pattern and local topography. Consequently, a fair measure or estimation of local wind components is very useful for a correct interpretation of coastal oceanographic processes. From hourly data series, a model was build to estimate the meridional (North - South) and zonal (East -West) wind components in Bahía Coliumo (36°32' S; 72°57' W), from wind data measured in Bella Vista meteorological station (36°47' S; 73°07' W, Concepción) as independent variable. The proposed models are: Uc(i)= 0.280+0.200U",(i)+0.156 V",,(i)+E¡(i), Vc(i)= -0,460+0.253UbP)+0.839V bi)+E), 2(i), for the meridional and zonal components, respectively. These bivariant models yielded better estimates than models with only one wind component as independent variables. The meridional component was the best correlated between the original series, and the one wich was best predicted by the model. That is of particular interest since the meridional wind component is the causing agent of coastal upwellings.
Coastal upwellings off Central Chile are caused by the combined effect of the redominating wind pattern and local topography. Consequently, a fair measure or estimation of local wind components is very useful for a correct interpretation of coastal oceanographic processes. From hourly data series, a model was build to estimate the meridional (North - South) and zonal (East -West) wind components in Bahía Coliumo (36°32' S; 72°57' W), from wind data measured in Bella Vista meteorological station (36°47' S; 73°07' W, Concepción) as independent variable. The proposed models are: Uc(i)= 0.280+0.200U",(i)+0.156 V",,(i)+E¡(i), Vc(i)= -0,460+0.253UbP)+0.839V bi)+E), 2(i), for the meridional and zonal components, respectively. These bivariant models yielded better estimates than models with only one wind component as independent variables. The meridional component was the best correlated between the original series, and the one wich was best predicted by the model. That is of particular interest since the meridional wind component is the causing agent of coastal upwellings.
Description
Keywords
Viento, Oceanografía, Surgencias, Chile central