Diatom biostratigraphy and sea ice concentration reconstruction from core DA06-139G, Vaigat Strait in Disko Bugt, West Greenland ...

• Main Authors: Sha, Longbin, Jiang, Hui, Seidenkrantz, Marit-Solveig, Knudsen, Karen Luise
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2012
• Subjects: Gravity corer; Climate Change Learning from the past climate Past4Future; Greenland; Knudsen; Vaigat; Disko bugt; Iceland; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.784055; https://doi.pangaea.de/10.1594/PANGAEA.784055

A diatom-based sea-ice concentration (SIC) transfer function is developed using 72 surface samples from west of Greenland and around Iceland, and through comparison with the associated modern SIC. Canonical correspondence analysis on surface sediment diatoms and monthly average of SIC reveals that April SIC is the most important environmental factor controlling the distribution of diatoms in the area, and permits the development of a diatom-based SIC transfer function. The consistency between reconstructed SIC based on diatoms from West Greenland and the instrumental and documentary data during the last ~75 years demonstrates that the diatom-based SIC reconstruction is reliable for studying the palaeoceanography off West Greenland. Relatively warm conditions with strong influence of the Irminger Current (IC) are indicated for the early part of the record (~5000-3860 cal. yr BP), corresponding in time to the latest part of the Holocene Thermal Maximum. The April SIC oscillated around the mean value between ... : Supplement to: Sha, Longbin; Jiang, Hui; Seidenkrantz, Marit-Solveig; Knudsen, Karen Luise; Olsen, Jesper; Kuijpers, Antoon; Liu, Y (2014): A diatom-based sea-ice reconstruction for the Vaigat Strait (Disko Bugt, West Greenland) over the last 5000yr. Palaeogeography, Palaeoclimatology, Palaeoecology, 403, 66-79 ...