Geochemistry, isotopic ratios, granulometry and Uk'37 derived SST of cores obtained during Poseidon cruise POS287, off Portugal ...

• Main Authors: Abrantes, Fatima F, Rodrigues, Teresa, Montanari, B, Santos, C, Witt, L, Lopes, Cristina, Voelker, Antje H L
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2011
• Subjects: Box corer; Gravity corer; POS287; Poseidon; North Atlantic; North Atlantic oscillation; Planktonic foraminifera
• Online Access: https://dx.doi.org/10.1594/pangaea.784992; https://doi.pangaea.de/10.1594/PANGAEA.784992

Continental and marine conditions during the last millennium off Porto, Portugal (the southern pole of the North Atlantic Oscillation, NAO), are reconstructed from a sediment archive through a high-resolution multiproxy study and instrumental evidence. Results show multidecadal variability and sea surface temperatures (SSTs) that correlate well with previously published land and sea-based Northern Hemisphere temperature records, and appear to be responding to long-term solar insolation variability. Precipitation was negatively correlated with the NAO, whereas strong flooding events occurred at times of marked climate cooling (AD 1100-1150 and 1400-1470) and transitions in solar activity. AD 1850 marks a major shift in the phytoplankton community associated with a decoupling of d18O records of 3 planktonic foraminifera species. These changes are interpreted as a response to a reduction in the summer and/or annual upwelling and more frequent fall-winter upwelling-like events. This shift's coincidence with a ... : Supplement to: Abrantes, Fatima F; Rodrigues, Teresa; Montanari, B; Santos, C; Witt, L; Lopes, Cristina; Voelker, Antje H L (2011): Climate of the last millennium at the southern pole of the North Atlantic Oscillation: an inner-shelf sediment record of flooding and upwelling. Climate Research, 48(2-3), 261-280 ...