Late Miocene and Pliocene dinoflagellate cysts, acritarchs and terrestrial palynomorphs from ODP Hole 642B, Vøring Plateau, Norwegian Sea ...

• Main Authors: De Schepper, Stijn, Beck, Kristina Marie, Mangerud, Gunn, Schreck, Michael, Matthiessen, Jens
• Format: Dataset
• Language: English
• Published: PANGAEA 2015
• Subjects: Impagidinium sp.; Sample code/label; DEPTH, sediment/rock; AGE; Age, minimum/young; Age, maximum/old; Dry mass; Lycopodium tablets; Lycopodium clavatum spores per tablet; Lycopodium clavatum, standard deviation; Lycopodium clavatum markers counted; Achomosphaera andalousiensis andalousiensis; Achomosphaera andalousiensis suttonensis; Amiculosphaera umbraculum; Ataxiodinium choane; Ataxiodinium confusum; Ataxiodinium sp.; Ataxiodinium zevenboomii; Ataxiodinium spp.; Barssidinium graminosum; Barssidinium pliocenicum; Barssidinium sp.; Batiacasphaera micropapillata complex; Batiacasphaera minuta; Batiacasphaera hirsuta; Batiacasphaera sphaerica; Batiacasphaera spp.; Bitectatodinium raedwaldii; Bitectatodinium? serratum; Bitectatodinium sp.; Bitectatodinium spp.; Bitectatodinium tepikiense; Brigantedinium spp.; Cerebrocysta? namocensis; Cerebrocysta poulsenii; Corrudinium devernaliae; Corrudinium harlandii; Corrudinium? labradori; Cristadinium diminutivum; Dapsilidinium pseudocolligerum; Desotodinium wrennii; Echinidinium spp.; Filisphaera filifera filifera; Filisphaera filifera pilosa; Filisphaera microornata; Filisphaera spp.; Habibacysta tectata; Heteraulacacysta sp.; Hystrichokolpoma rigaudiae; Impagidinium aculeatum; Bering Strait; Greenland; Nordic Seas; North Atlantic Deep Water; North Atlantic; Norwegian Sea
• Online Access: https://dx.doi.org/10.1594/pangaea.846838; https://doi.pangaea.de/10.1594/PANGAEA.846838

The globally warm climate of the early Pliocene gradually cooled from 4 million years ago, synchronous with decreasing atmospheric CO2 concentrations. In contrast, palaeoceanographic records indicate that the Nordic Seas cooled during the earliest Pliocene, before global cooling. However, a lack of knowledge regarding the precise timing of Nordic Seas cooling has limited our understanding of the governing mechanisms. Here, using marine palynology, we show that cooling in the Nordic Seas was coincident with the first trans-Arctic migration of cool-water Pacific mollusks around 4.5 million years ago, and followed by the development of a modern-like Nordic Seas surface circulation. Nordic Seas cooling precedes global cooling by 500,000 years; as such, we propose that reconfiguration of the Bering Strait and Central American Seaway triggered the development of a modern circulation in the Nordic Seas, which is essential for North Atlantic Deep Water formation and a precursor for more widespread Greenland ... : Supplement to: De Schepper, Stijn; Schreck, Michael; Beck, Kristina Marie; Matthiessen, Jens; Fahl, Kirsten; Mangerud, Gunn (2015): Early Pliocene onset of modern Nordic Seas circulation related to ocean gateway changes. Nature Communications, 6, 8659 ...