(Table S1) Palynology of IODP Hole 302-M0004A
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PANGAEA
2006
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| author | Sluijs, Appy Schouten, Stefan Pagani, Mark Woltering, Martijn Brinkhuis, Henk Sinninghe Damsté, Jaap S Dickens, Gerald Roy Huber, Matthew Reichart, Gert-Jan Stein, Ruediger Matthiessen, Jens Lourens, Lucas Joost Pedentchouk, Nikolai Backman, Jan Moran, Kathryn Expedition 302 Scientists |
| author_facet | Sluijs, Appy Schouten, Stefan Pagani, Mark Woltering, Martijn Brinkhuis, Henk Sinninghe Damsté, Jaap S Dickens, Gerald Roy Huber, Matthew Reichart, Gert-Jan Stein, Ruediger Matthiessen, Jens Lourens, Lucas Joost Pedentchouk, Nikolai Backman, Jan Moran, Kathryn Expedition 302 Scientists |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | 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. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_769815 |
| institution | PANGAEA |
| language | en |
| publishDate | 2006 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | (Table S1) Palynology of IODP Hole 302-M0004A Sluijs, Appy Schouten, Stefan Pagani, Mark Woltering, Martijn Brinkhuis, Henk Sinninghe Damsté, Jaap S Dickens, Gerald Roy Huber, Matthew Reichart, Gert-Jan Stein, Ruediger Matthiessen, Jens Lourens, Lucas Joost Pedentchouk, Nikolai Backman, Jan Moran, Kathryn Expedition 302 Scientists 302-M0004A; ACEX-M4A; Angiosperms; Apectodinium spp.; Arctic Coring Expedition, ACEX; Arctic Ocean; Areoligera complex; Caligodinium aceras; CCGS Captain Molly Kool (Vidar Viking); Cerodinium complex; Cordosphaeridium complex; DEPTH, sediment/rock; Dinoflagellate cyst; Dinoflagellate cyst, low salinity tolerant; Dinoflagellate cyst indeterminata; DSDP/ODP/IODP sample designation; Exp302; Foraminiferal organic linings per unit mass; Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP; Membranosphaera complex; Palynomorpha, marine; Palynomorpha, terrestrial; Pollen, gymnosperms; Polysphaeridium complex; Sample code/label; Senegalinium spp.; Spiniferites complex; Spores 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. |
| title | (Table S1) Palynology of IODP Hole 302-M0004A |
| topic | 302-M0004A; ACEX-M4A; Angiosperms; Apectodinium spp.; Arctic Coring Expedition, ACEX; Arctic Ocean; Areoligera complex; Caligodinium aceras; CCGS Captain Molly Kool (Vidar Viking); Cerodinium complex; Cordosphaeridium complex; DEPTH, sediment/rock; Dinoflagellate cyst; Dinoflagellate cyst, low salinity tolerant; Dinoflagellate cyst indeterminata; DSDP/ODP/IODP sample designation; Exp302; Foraminiferal organic linings per unit mass; Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP; Membranosphaera complex; Palynomorpha, marine; Palynomorpha, terrestrial; Pollen, gymnosperms; Polysphaeridium complex; Sample code/label; Senegalinium spp.; Spiniferites complex; Spores |
| url | https://doi.org/10.1594/PANGAEA.769815 |