Publikationsdatum:
2024-01-09
Beschreibung:
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 glaciation in the late Pliocene.
Schlagwort(e):
104-642B; Achomosphaera andalousiensis andalousiensis; Achomosphaera andalousiensis suttonensis; Acritarcha; Acritarcha, error; Acritarcha indeterminata; Acritarcha per unit mass; Acritarch sp.; Acritarch spp.; AGE; Age, maximum/old; Age, minimum/young; Amiculosphaera umbraculum; Ataxiodinium choane; Ataxiodinium confusum; Ataxiodinium sp.; Ataxiodinium spp.; Ataxiodinium zevenboomii; Barssidinium graminosum; Barssidinium pliocenicum; Barssidinium sp.; Batiacasphaera hirsuta; Batiacasphaera micropapillata complex; Batiacasphaera minuta; Batiacasphaera sphaerica; Batiacasphaera spp.; Bitectatodinium? serratum; Bitectatodinium raedwaldii; Bitectatodinium sp.; Bitectatodinium spp.; Bitectatodinium tepikiense; Botryococcus; Brigantedinium spp.; Cerebrocysta? namocensis; Cerebrocysta poulsenii; Corrudinium? labradori; Corrudinium devernaliae; Corrudinium harlandii; Counting; Counting, palynology; Cristadinium diminutivum; Cyclopsiella granosa; Cymatiosphaera? aegirii; Cymatiosphaera? fensomei; Cymatiosphaera? icenorum; Cymatiosphaera? invaginata; Cymatiosphaera spp.; Cysts; Dapsilidinium pseudocolligerum; Debarya glyptosperma; DEPTH, sediment/rock; Desotodinium wrennii; Dinoflagellate cyst; Dinoflagellate cyst, error; Dinoflagellate cyst, reworked; Dinoflagellate cyst per unit mass; DRILL; Drilling/drill rig; Dry mass; DSDP/ODP/IODP sample designation; Echinidinium spp.; Filisphaera filifera filifera; Filisphaera filifera pilosa; Filisphaera microornata; Filisphaera spp.; Gelasinicysta vangeelii; Habibacysta tectata; Heteraulacacysta sp.; Hystrichokolpoma rigaudiae; Impagidinium aculeatum; Impagidinium pallidum; Impagidinium paradoxum; Impagidinium patulum; Impagidinium solidum; Impagidinium sp.; Impagidinium sphaericum; Impagidinium spp.; Invertocysta lacrymosa; Invertocysta sp.; Invertocysta spp.; Invertocysta tabulata; Joides Resolution; Labyrinthodinium truncatum; Lavradosphaera canalis; Lavradosphaera crista; Lavradosphaera lucifer; Lavradosphaera sp.; Lavradosphaera sp. cf. L. canalis; Lavradosphaera spp.; Leg104; Leiosphaeridia rockhallensis; Lejeunecysta catomus; Lejeunecysta hatterasensis; Lejeunecysta spp.; Lingulodinium machaerophorum; Lycopodium clavatum, standard deviation; Lycopodium clavatum markers counted; Lycopodium clavatum spores per tablet; Lycopodium tablets; Melitasphaeridium choanophorum; Melitasphaeridium sp.; Melitasphaeridium sp. cf. M. choanophorum; Nannobarbophora walldalei; Nematosphaeropsis labyrinthus; Nematosphaeropsis lativittata; Nematosphaeropsis spp.; Norwegian Sea; Ocean Drilling Program; ODP; Operculodinium? eirikianum var. crebrum; Operculodinium? eirikianum var. eirikianum; Operculodinium centrocarpum; Operculodinium janduchenei; Operculodinium sp.; Operculodinium spp.; Operculodinium tegillatum; Palynomorpha, terrestrial; Palynomorpha, terrestrial, standard deviation; Pentapharsodinium dalei; Pollen, bisaccate; Pollen, non-bisaccate; Protoceratium reticulatum; Pterospermella; Pyxidinopsis braboi; Pyxidinopsis sp.; Pyxidinopsis spp.; Pyxidinopsis vesiculata; Reticulatosphaera actinocoronata; Sample code/label; Selenopemphix armageddonensis; Selenopemphix brevispinosa; Selenopemphix dionaeacysta; Selenopemphix nephroides; Selenopemphix quanta; Selenopemphix spp.; Spiniferites elongatus; Spiniferites membranaceus; Spiniferites mirabilis; Spiniferites sp.; Spiniferites spp.; Spores; Tasmanites; Tectatodinium pellitum; Trinovantedinium glorianum; Trinovantedinium spp.; Trinovantedinium variabile; Tsuga; Tuberculodinium vancampoae
Materialart:
Dataset
Format:
text/tab-separated-values, 2564 data points
Permalink
