Dinocyst percentages in sediment core MSM05/3_343310 from Disko Bugt, West Greenland ...

• Main Authors: Allan, Estelle, de Vernal, Anne, Knudsen, Mads Faurschou, Hillaire-Marcel, Claude, Moros, Matthias, Ribeiro, Sofia, Ouellet‐Bernier, Marie‐Michèle, Seidenkrantz, Marit-Solveig
• Format: Dataset
• Language: English
• Published: PANGAEA 2019
• Subjects: Arctic climate change; Arctic sea ice reconstructions; Dinocyst database; Late Holocene; West Greenland; Event label; Age; AGE; Achomosphaera spp.; Bitectatodinium tepikiense; Impagidinium aculeatum; Impagidinium pallidum; Nematosphaeropsis labyrinthus; Operculodinium centrocarpum; Spiniferites elongatus; Spiniferites ramosus; Spiniferites belerius; Spiniferites bentori; Spiniferites spp.; Pentapharsodinium dalei cyst; Islandinium minutum; Islandinium? cezare; Islandinium brevispinosum; Brigantedinium spp.; Dubridinium spp.; Lejeunecysta spp.; Selenopemphix quanta; Protoperidinium nudum cyst; Votadinium calvum; Protoperidinium americanum; Echinidinium spp.; MultiCorer; Gravity corer; Counting, palynology; MSM05/3; Maria S. Merian; Climate change; Disko bugt; Greenland; ice core; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.898915; https://doi.pangaea.de/10.1594/PANGAEA.898915

Palynological analyses of sediment core MSM343310 from Disko Bugt (68°38.861' N, 53°49.493' W) document decadal‐ to centennial‐scale variability of sea surface conditions during the last ~3,600 years. Dinocyst fluxes (>10⁴ cysts/cm² yr⁻¹) indicate a very high productivity. Dinocyst assemblages dominated by Islandinium minutum, Brigantedinium spp., Islandinium? cezare, and the cyst of Pentapharsodinium dalei suggest low surface salinity and marked shifts in summer sea surface temperature. The application of the modern analog technique to dinocyst assemblages, using an updated reference data set with new sites from the West Greenland margin, led to reconstruct decadal‐centennial‐scale variations in sea surface salinity and temperature, in phase with the δ18O variations in the Camp Century ice core. At ~1.5 ka BP, the seasonal sea ice cover records an important regime change, from winter‐only sea ice to more unstable conditions marked by successive cooling pulses with sea ice cover of up to 8 months/yr. The ... : Supplement to: Allan, Estelle; de Vernal, Anne; Knudsen, Mads Faurschou; Hillaire-Marcel, Claude; Moros, Matthias; Ribeiro, Sofia; Ouellet‐Bernier, Marie‐Michèle; Seidenkrantz, Marit-Solveig (2018): Late Holocene sea surface instabilities in the Disko Bugt Area, West Greenland, in phase with δ18O oscillations at Camp Century. Paleoceanography and Paleoclimatology, 33(2), 227-243 ...