| Summary: | X Congreso Geológico de España, 5-7 de julio 2021, Vitoria-Gasteiz.-- 1 page [EN] The Today, the volume of dense water supplied by Atlantic-Mediterranean exchange through the Gibraltar Strait is amongst the largest in the global ocean. For the past five million years this overflow has generated a saline plume at intermediate depths in the Atlantic that contributes to the formation of North Atlantic Deep Water and to regulate heat and salt transport in the Atlantic. During the Miocene, a wide, open seaway linking the Mediterranean and Atlantic evolved into two narrow corridors: one in northern Morocco; the other in southern Spain. Formation of these corridors permitted Mediterranean salinity to rise and a new, distinct, dense water mass to form and overspill into the Atlantic for the first time. Further restriction and closure of these connections resulted in the Messinian salinity crisis. IMMAGE is an amphibious drilling proposal designed to recover a complete record of Atlantic-Mediterranean exchange from its Late Miocene inception to its current configuration. This will be achieved by targeting Miocene offshore sediments on either side of the Gibraltar Strait with IODP and recovering Miocene core from the two precursor connections now exposed on land with ICDP. The scientific aims of IMMAGE are to constrain quantitatively the consequences for ocean circulation and global climate of the inception of Atlantic Mediterranean exchange; to explore the mechanisms for high amplitude environmental change in marginal marine systems and to test physical oceanographic hypotheses for extreme high-density overflow dynamics that do not exist in the world today on this scale [ES] En la actualidad, el volumen de agua densa aportada por el Mediterráneo a través del estrecho de Gibraltar esta entre los más grandes del Océano global. A lo largo de los últimos 5 millones de años el ¿Overflow¿ del Mediterráneo ha formado una masa de agua salina que se extiende hacia el oeste y norte en el Atlántico a profundidades intermedias, ...
|
|---|