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| Main Authors: | , |
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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
1996
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| Online Access: | https://doi.org/10.1594/PANGAEA.712045 |
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| _version_ | 1867168074348625920 |
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| author | Wilson, Paul A Opdyke, Bradley N |
| author_facet | Wilson, Paul A Opdyke, Bradley N |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The classic paleotemperature record based on d18O data from pelagic foraminiferal calcite suggests that equatorial sea-surface temperatures during the Maastrichtian (~12-20°C) were much cooler than today (~27-29°C). Such cool equatorial temperatures contradict basic theories of tropical atmospheric and ocean dynamics. We report d18O data from remarkably well preserved rudist aragonite and magnesian calcite cements of Maastrichtian age (~69+/-1 Ma) from the carbonate platform of Wodejebato guyot in the western Pacific. These data suggest that equatorial sea-surface temperatures in the Maastrichtian (best estimate ~27-32°C) were at least as warm as today. This finding helps reconcile the geologic d18O record with ocean-atmospheric dynamic theory and implies a reduction in the poleward heat flux required by global climate simulations of greenhouse conditions. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_712045 |
| institution | PANGAEA |
| language | en |
| publishDate | 1996 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | (Table 1) Chemical and isotopic compositions of rudist aragonite and magnesian calcite cements from ODP Hole 144-877A Wilson, Paul A Opdyke, Bradley N 144-877A; Calculated average/mean values; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Iron; Joides Resolution; Leg144; Magnesium; Manganese; North Pacific Ocean; Number of observations; Ocean Drilling Program; ODP; Sample code/label; Sample type; Strontium; δ13C, carbonate; δ18O, carbonate The classic paleotemperature record based on d18O data from pelagic foraminiferal calcite suggests that equatorial sea-surface temperatures during the Maastrichtian (~12-20°C) were much cooler than today (~27-29°C). Such cool equatorial temperatures contradict basic theories of tropical atmospheric and ocean dynamics. We report d18O data from remarkably well preserved rudist aragonite and magnesian calcite cements of Maastrichtian age (~69+/-1 Ma) from the carbonate platform of Wodejebato guyot in the western Pacific. These data suggest that equatorial sea-surface temperatures in the Maastrichtian (best estimate ~27-32°C) were at least as warm as today. This finding helps reconcile the geologic d18O record with ocean-atmospheric dynamic theory and implies a reduction in the poleward heat flux required by global climate simulations of greenhouse conditions. |
| title | (Table 1) Chemical and isotopic compositions of rudist aragonite and magnesian calcite cements from ODP Hole 144-877A |
| topic | 144-877A; Calculated average/mean values; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Iron; Joides Resolution; Leg144; Magnesium; Manganese; North Pacific Ocean; Number of observations; Ocean Drilling Program; ODP; Sample code/label; Sample type; Strontium; δ13C, carbonate; δ18O, carbonate |
| url | https://doi.org/10.1594/PANGAEA.712045 |