Planktic foraminiferal abundance and stable oxygen isotope ratios of sediment cores from the Southern California Borderlands
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| Autori principali: | , , , , |
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| Natura: | Dataset Open Access |
| Lingua: | en |
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PANGAEA
1996
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| _version_ | 1867171358683693056 |
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| author | Mortyn, P Graham Thunell, Robert C Anderson, David M Stott, Lowell D Le, Jianning |
| author_facet | Mortyn, P Graham Thunell, Robert C Anderson, David M Stott, Lowell D Le, Jianning |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | A variety of evidence suggests that average sea surface temperatures (SSTs) during the last glacial maximum in the California Borderlands region were significantly colder than during the Holocene. Planktonic foraminiferal delta18O evidence and average SST estimates derived by the modern analog technique indicate that temperatures were 6°-10°C cooler during the last glacial relative to the present. The glacial plankton assemblage is dominated by the planktonic foraminifer Neogloboquadrina pachyderma (sinistral coiling) and the coccolith Coccolithus pelagicus, both of which are currently restricted to subpolar regions of the North Pacific. The glacial-interglacial average SST change determined in this study is considerably larger than the 2°C change estimated by Climate: Long-Range Investigation, Mapping, and Prediction (CLIMAP) [1981]. We propose that a strengthened California Current flow was associated with the advance of subpolar surface waters into the Borderlands region during the last glacial. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_729958 |
| institution | PANGAEA |
| language | en |
| publishDate | 1996 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Planktic foraminiferal abundance and stable oxygen isotope ratios of sediment cores from the Southern California Borderlands Mortyn, P Graham Thunell, Robert C Anderson, David M Stott, Lowell D Le, Jianning AHF-11343; AHF-16830; AHF-16832; AHF-28181; PC; Piston corer; San Nicolas Basin; Tanner Basin; Velero Basin A variety of evidence suggests that average sea surface temperatures (SSTs) during the last glacial maximum in the California Borderlands region were significantly colder than during the Holocene. Planktonic foraminiferal delta18O evidence and average SST estimates derived by the modern analog technique indicate that temperatures were 6°-10°C cooler during the last glacial relative to the present. The glacial plankton assemblage is dominated by the planktonic foraminifer Neogloboquadrina pachyderma (sinistral coiling) and the coccolith Coccolithus pelagicus, both of which are currently restricted to subpolar regions of the North Pacific. The glacial-interglacial average SST change determined in this study is considerably larger than the 2°C change estimated by Climate: Long-Range Investigation, Mapping, and Prediction (CLIMAP) [1981]. We propose that a strengthened California Current flow was associated with the advance of subpolar surface waters into the Borderlands region during the last glacial. |
| title | Planktic foraminiferal abundance and stable oxygen isotope ratios of sediment cores from the Southern California Borderlands |
| topic | AHF-11343; AHF-16830; AHF-16832; AHF-28181; PC; Piston corer; San Nicolas Basin; Tanner Basin; Velero Basin |
| url | https://doi.org/10.1594/PANGAEA.729958 |