(Table S1) Palynology of IODP Hole 302-M0004A
Citation
Sluijs A, Schouten S, Pagani M, Woltering M, Brinkhuis H, Sinninghe Damsté J S, Dickens G R, Huber M, Reichart G, Stein R, Matthiessen J, Lourens L J, Pedentchouk N, Backman J, Moran K, Expedition 302 Scientists (2006). (Table S1) Palynology of IODP Hole 302-M0004A. PANGAEA - Publishing Network for Geoscientific and Environmental Data. Occurrence dataset https://doi.org/10.1594/pangaea.769815 accessed via GBIF.org on 2023-06-03.Description
The Palaeocene/Eocene thermal maximum, 55 million years ago, was a brief period of widespread, extreme climatic warming (Zachos et al., 2003; Kennett and Stott, 1991, doi:10.1038/353225a0; Tripati and Elderfield, 2005, doi:10.1126/science.1109202), that was associated with massive atmospheric greenhouse gas input (Dickens et al., 1995, doi:10.1029/95PA02087). Although aspects of the resulting environmental changes are well documented at low latitudes, no data were available to quantify simultaneous changes in the Arctic region. Here we identify the Palaeocene/Eocene thermal maximum in a marine sedimentary sequence obtained during the Arctic Coring Expedition (Backman et al., 2006, doi:10.2204/iodp.proc.302.2006). We show that sea surface temperatures near the North Pole increased from 18 °C to over 23 °C during this event. Such warm values imply the absence of ice and thus exclude the influence of ice-albedo feedbacks on this Arctic warming. At the same time, sea level rose while anoxic and euxinic conditions developed in the ocean's bottom waters and photic zone, respectively. Increasing temperature and sea level match expectations based on palaeoclimate model simulations (Shellito et al., 2003, doi:10.1016/S0031-0182(02)00718-6), but the absolute polar temperatures that we derive before, during and after the event are more than 10 °C warmer than those model-predicted. This suggests that higher-than-modern greenhouse gas concentrations must have operated in conjunction with other feedback mechanisms -perhaps polar stratospheric clouds (Sloan and Pollard, 1998, doi:10.1029/98GL02492) or hurricane-induced ocean mixing (Emanuel et al., 2004, doi:10.1175/1520-0469(2004)061<0843:ECOTCI>2.0.CO;2)- to amplify early Palaeogene polar temperatures.Taxonomic Coverages
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Protozoarank: kingdom
Geographic Coverages
Event: 302-M0004A,
Arctic Ocean
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Bibliographic Citations
Contacts
Appy Sluijsoriginator
Stefan Schouten
originator
Mark Pagani
originator
Martijn Woltering
originator
Henk Brinkhuis
originator
Jaap S Sinninghe Damsté
originator
Gerald Roy Dickens
originator
Matthew Huber
originator
Gert-Jan Reichart
originator
Ruediger Stein
originator
Jens Matthiessen
originator
Lucas Joost Lourens
originator
Nikolai Pedentchouk
originator
Jan Backman
originator
Kathryn Moran
originator
Expedition 302 Scientists
originator
metadata author
PANGAEA - Data Publisher for Earth & Environmental Science
email: info@pangaea.de
homepage: https://www.pangaea.de
administrative point of contact
PANGAEA - Data Publisher for Earth & Environmental Science
email: info@pangaea.de
homepage: http://www.pangaea.de