Publication: Relaciones entre mareas y otros fenómenos geodinámicos: estudios en la Península Ibérica y California
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2016-08-12
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Universidad Complutense de Madrid
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Abstract
En el ámbito de la investigación sobre Mareas, existen controversias que han dado lugar a extensos debates científicos y a la publicación de resultados contradictorios. Dos de estas discusiones, ampliamente conocidas, son la interpretación geofísica de los residuos finales de marea gravimétrica y la existencia o no de correlación entre las mareas y la ocurrencia de terremotos. El objetivo fundamental de esta tesis doctoral es realizar aportaciones a ambos aspectos de forma significativa y relevante. Si a las amplitudes y desfasajes de las componentes armónicas del potencial de mareas obtenidas a partir de datos de observación les restamos la parte correspondiente al modelo teórico de marea sólida y también la parte correspondiente al efecto oceánico, obtenemos un vector residuo final de marea cuya interpretación es un asunto muy debatido en Geodesia. Mientras que algunos autores sugieren que los residuos finales están relacionados con posibles errores instrumentales y de medida o con errores en la evaluación de los cálculos de la carga oceánica, otros proponen ciertas relaciones empíricas entre estos residuos finales de marea gravimétrica y parámetros que implican variaciones estructurales con respecto a un modelo de Tierra elástico homogéneo, como el flujo térmico o la edad tectonotérmica de la litosfera...
In the sphere of the investigation of Tides, there are some controversies that have given rise to extensive scientific debates and the publishing of contradictory results. Two of these discussions, widely known, are the geophysical interpretation of tidal gravity final residuals, and the existence (or not) of correlation between tides and the occurrence of earthquakes. The ultimate goal of this PhD. thesis is making a contribution to both issues in a relevant and significant way. If amplitudes and phase-lags of the harmonic components of the tide potential evaluated for the body tide Earth model and the computed oceanic effect are subtracted from amplitudes and phase-lags obtained from observed data, a final residual tidal vector is obtained whose interpretation is an issue of high debate in geodesy. Whereas some authors suggest that final residuals are related to possible instrumental and measurement errors or to errors in the evaluation of the oceanic load computations, others propose certain empirical relationships between these gravity tidal residuals and parameters implying structural variations with respect to a homogeneous elastic Earth model, such as the heat flow or the tectonothermal age of the lithosphere...
In the sphere of the investigation of Tides, there are some controversies that have given rise to extensive scientific debates and the publishing of contradictory results. Two of these discussions, widely known, are the geophysical interpretation of tidal gravity final residuals, and the existence (or not) of correlation between tides and the occurrence of earthquakes. The ultimate goal of this PhD. thesis is making a contribution to both issues in a relevant and significant way. If amplitudes and phase-lags of the harmonic components of the tide potential evaluated for the body tide Earth model and the computed oceanic effect are subtracted from amplitudes and phase-lags obtained from observed data, a final residual tidal vector is obtained whose interpretation is an issue of high debate in geodesy. Whereas some authors suggest that final residuals are related to possible instrumental and measurement errors or to errors in the evaluation of the oceanic load computations, others propose certain empirical relationships between these gravity tidal residuals and parameters implying structural variations with respect to a homogeneous elastic Earth model, such as the heat flow or the tectonothermal age of the lithosphere...
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Tesis inédita de la Universidad Complutense de Madrid, Facultad de Ciencias Matemáticas, Sección Departamental de Astronomía y Geodesia, leída el 22-01-2016