2000-year-long diatom inferred high-resolution August SST reconstruction from the subpolar North Atlantic ...

• Main Author: Miettinen, Arto
• Format: Dataset
• Language: unknown
• Published: NOAA's National Climatic Data Center (NCDC) 2012
• Subjects: Norwegian Sea; North Atlantic
• Online Access: https://dx.doi.org/10.21334/npolar.2012.816e992b; https://data.npolar.no/dataset/816e992b-63ff-41b5-85b9-b3258a55b31b

A 2800-yr-long August sea surface temperature (aSST) record based on fossil diatom assemblages is generated from a marine sediment core from the northern subpolar North Atlantic. The record is compared with the aSST record from the Norwegian Sea to explore the variability of the aSST gradient between these areas during the late Holocene. The aSST records demonstrate the opposite climate tendencies toward a persistent warming in the core site in the subpolar North Atlantic and cooling in the Norwegian Sea. At the multicentennial scale of aSST variability of 600-900 yr, the records are nearly in antiphase with warmer (colder) periods in the subpolar North Atlantic corresponding to the colder (warmer) periods in the Norwegian Sea. At the shorter time scale of 200-450 yr, the records display a phase-locked behavior with a tendency for the positive aSST anomalies in the Norwegian Sea to lead, by ~30 yr, the negative aSST anomalies in the subpolar North Atlantic. This apparent aSST seesaw might have an effect on ...