Resumen de Evento 8.2k en la región cantábrica a partir de indicadores marinos (isótopos de oxígeno en gasterópodos) y terrestres (polen)

Asier García-Escárzaga, Sara Núñez de la Fuente, Igor Gutiérrez Zugasti, David Cuenca Solana, Javier Martín Chivelet, José Antonio López Sáez, Manuel R. González Morales

• The most prominent of the short climatic events occurred on the Early Holocene is the 8.2k event. However, the information about this abrupt climate change in northern Iberia is still scarce. This paper aims to improve our knowledge of climate variability in this area during the Early Holocene. To achieve this, δ18O values were obtained from subfossil shells of Phorcus lineatus (da Costa, 1778) recovered from the Mesolithic site of El Mazo (Asturias). Data from pollen and non-pollen palynomorphs obtained from the same site contributed to add details on this study. Results showed that shells from units dated to around 8.2 ka cal BP recorded slightly cooler summers than the rest of the sequence, suggesting thus that the 8.2k event had a certain impacton the oceanographic conditions in this area. The main palynological results showed that the vegetation is clearly affected by this abrupt climatic change, showing a decline in arboreal pollen because of colder and arid climate conditions