Sea surface temperatures, alkenones and sedimentation rates at the Alboran basin ...

• Main Authors: Martrat, Belén, Jimenez-Amat, Patricia, Zahn, Rainer, Grimalt, Joan O
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2014
• Subjects: North Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.787986; https://doi.pangaea.de/10.1594/PANGAEA.787986

Sea surface temperatures (SSTs) recorded by alkenones and oxygen isotopes in the Alboran basin are used here to describe, at an unprecedented fine temporal resolution, the present interglaciation (PIG, initiated at 11.7 ka BP), the last interglaciation (LIG, onset approximately at 129 ka) and respective deglaciations. Similarities and dissimilarities in the progression of these periods are reviewed in comparison with ice cores and stalagmites. Cold spells coeval with the Heinrich events (H) described in the North Atlantic include multi-decadal scale oscillations not previously obvious (up to 4 °C in less than eight centuries within the stadials associated with H1 and H11, ca 133 ka and 17 ka respectively). These abrupt oscillations precede the accumulation of organic rich layers deposited when perihelion moves from alignment with NH spring equinox to the summer solstice, a reference for deglaciations. Events observed during the last deglaciation at 17 ka, 14.8 ka and 11.7 ka are reminiscent of events ... : Supplement to: Martrat, Belén; Jimenez-Amat, Patricia; Zahn, Rainer; Grimalt, Joan O (2014): Similarities and dissimilarities between the last two deglaciations and interglaciations in the North Atlantic region. Quaternary Science Reviews, 99, 122-134 ...