Diatom percentage abundances and sea surface temperature reconstruction for core DA12-11/2-GC01 from the Iceland Basin

• Main Authors: Orme, Lisa C, Miettinen, Arto, Divine, Dmitry V, Husum, Katrine, Pearce, Christof, Van Nieuwenhove, Nicolas, Born, Andreas, Mohan, Rahul, Seidenkrantz, Marit-Solveig
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2021
• Subjects: diatoms; Holocene; Iceland; North Atlantic; 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; Rhizosolenia alata; Rhizosolenia bergonii; Bacteriosira fragilis; Roperia tesselata; Porosira glacialis; Actinocyclus curvatulus; Asteromphalus robustus; Hemidiscus cuneiformis; 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 nodulifer; Coscinodiscus oculus-iridis; Coscinodiscus asteromphalus; Nitzschia marina; Nitzschia bicapitata; Fragilariopsis cylindrus; Nitzschia angularis; Fragilariopsis oceanica; Bacteriastrum hyalinum; Synedra sp.; Nitzschia atlantica; Nitzschia uzun; Nitzschia kolaczeckii; Pseudoeunotia doliolus; Actinocyclus ehrenbergii; Thalassiosira nodulolineata; Coscinodiscus crenulatus; Coscinodiscus stellaris; Thalassionema nitzschioides var. parva; Gravity corer; SST reconstruction, transfer function-based approach; Counting, diatoms
• Online Access: https://dx.doi.org/10.1594/pangaea.930972; https://doi.pangaea.de/10.1594/PANGAEA.930972

Here, we present datasets of diatom abundance and a diatom-based sea surface temperature reconstruction from the Iceland Basin. The 419.5 cm long marine sediment core DA12-11/2-GC01 was recovered in September 2012 by the Danish R/V Dana using a gravity corer. The core was taken from a location at the northern edge of the Gardar Drift and the eastern edge of the Björn Drift in the Iceland Basin (61.36.536 °N, 20.42.164 °W) at a water depth of 2120 m. Diatoms were analysed at 5 cm intervals over the upper 2 m of core, representing the period 6100-0 cal years BP, with chronological constraints provided by 6 radiocarbon dates. Diatoms were analysed using standard procedures, including the identification and counting of a minimum of 300 diatom per sample, which allowed calculation of the percentage abundances of different species. These abundances were converted into estimates of sea surface temperature using the weight averaging partial least squares transfer function approach.