El Impacto De Eventos Catastrã“ficos Costeros en El Litoral Del Golfo De Cãdiz

Abstract

ResumenEl estudio de los eventos costeros en el pasado es importante para conocer el alcance y los períodos de recurrencia de los mismos, así como su papel de acumulación de la secuencia sedimentaria en el litoral. En este aspecto, la interpretación paleoambiental se basa generalmente en los depósitos de sedimentación "normal" (más lenta y continua), desechando por lo general el análisis de los eventos catastróficos debidos a su escasa frecuencia a una escala humana. Estos fenómenos "catastróficos", incluyendo temporales, huracanes y tsunamis, que logran producir una notable modificación del paisaje costero, afectando intensamente a las instalaciones humanas y constituyendo un riesgo natural de primera magnitud, constituyen el centro de atención del presente artículo.Palabras clave: Costa atlántica, eventos catastróficos, registro geológico, Terremoto de Lisboa 1755, tsunami, registro Golfo de Cádiz. AbstractThe study of the coastal events in the past is important to know their scope and their recurrence periods, as well as its role in the accumulation of the sedimentary sequence in the littoral. In this aspect, the paleoenvironmental interpretation is generally based on the deposits of "normal" sedimentation (slower and continue), rejecting in general the analysis of the catastrophic events due to its scanty frequency to a human scale. These "catastrophic" phenomena, including sea storms, hurricanes, and tsunamis, which manage to produce a notable modification of the coastal landscape, affecting intensely the human facilities and constituting a natural risk of the first magnitude, constitute the centre of attention of the present article.

Effect of climatic oscillations on small pelagic fisheries and its economic profit in the Gulf of Cadiz

“…Survival of European sardine larvae is closely related to vertical mixing and, consequently, to wind stress as a contributing mechanism (Lloret et al 2004 ). Atmospheric disturbances affect marine sedimentation by a transfer of energy from the air to the sea, and from it to the seabed (De Luque 2008 ). This energy agitates the waters favouring the mixing of deep and superficial waters, increasing the contribution of nutrients to the surface (Báez et al 2013b ), affecting primary production positively, and this in turn affects the abundance of European sardine (Vargas-Yáñez et al 2020 ).…”

High-resolution late Holocene sedimentary cores record the long history of the city of Cádiz (south-western Spain)

“…Whilst the spit of Cádiz and the palaeo-islands are exposed to storms (Benavente et al, 2006;Del Río et al, 2012), palaeotsunami occurrences are evidenced in various depositional settings in and around the Bay of Cádiz. This includes lithofacies recording high-energy events in offshore sediments (Gutiérrez-Mas et al, 2009a), washover fans on the Valdelagrana spit (Luque et al, 2002), and coarse-grained shelly layers intercalated in the marshlands of the Guadalete/San Pedro River (Dabrio et al, 1997;Luque et al, 2002;de Duque, 2008;Gutiérrez-Mas, 1992Gutiérrez-Mas et al, 2009b). The Lisbon tsunami of 1755 CE was the focus of much research in this context (Dabrio et al, 1997;Cuven et al, 2013;.…”