Diatom percentage abundances and sea surface temperature reconstruction for core AI07-06G, from Trinity Bay, Newfoundland

• Main Authors: Orme, Lisa C, Miettinen, Arto, Seidenkrantz, Marit-Solveig, Tuominen, Kirsi, Pearce, Christof, Divine, Dmitry V, Oksman, Mimmi, Kuijpers, Antoon
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2021
• Subjects: diatoms; Holocene; Newfoundland; Sea surface temperature; DEPTH, sediment/rock; AGE; Sea surface temperature, August; Thalassiothrix longissima; Thalassionema nitzschioides; Rhizosolenia hebetata forma hebetata; Rhizosolenia hebetata forma semispina; Rhizosolenia borealis; Proboscia alata; Bacterosira fragilis; Roperia tesselata; Porosira glacialis; Actinocyclus curvatulus; Asteromphalus robustus; Thalassiosira gravida spore; Thalassiosira gravida vegetative; Thalassiosira anguste-lineata; Thalassiosira eccentrica; Thalassiosira trifulta; Thalassiosira lineata; Thalassiosira nordenskioldii; Thalassiosira oestrupii; Thalassiosira hyalina; Thalassiosira angulata; Thalassiosira pacifica; Thalassiosira ferelineata; Coscinodiscus radiatus; Coscinodiscus marginatus; Coscinodiscus oculus-iridis; Coscinodiscus asteromphalus; Nitzschia marina; Nitzschia bicapitata; Fragilariopsis cylindrus; Nitzschia angularis; Fragilariopsis oceanica; Synedra sp.; Nitzschia atlantica; Nitzschia kolaczeckii; Pseudoeunotia doliolus; Thalassiosira nodulolineata; Coscinodiscus lineatus; Gravity corer; SST reconstruction, transfer function-based approach; Counting, diatoms; AI07; Akademik Ioffe; Labrador Sea
• Online Access: https://dx.doi.org/10.1594/pangaea.930940; https://doi.pangaea.de/10.1594/PANGAEA.930940

Due to the shortness of available records, the longterm patterns of climate variability in the Labrador Sea and Newfoundland region are not clear. Here, a diatom-based reconstruction of summer sea-surface temperature (SST) developed from Trinity Bay, Newfoundland, provides insight into variations of SST since 7.2 cal ka BP in the southwestern Labrador Sea. The results show that the Holocene Thermal Maximum (HTM) lasted until c. 5.2 cal ka BP, which was followed by a gradual cooling trend overprinted by centennial temperature fluctuations of 1-2°C.