Sea surface temperature calculation based on alkenones in sediments off northwest Africa
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| Autori principali: | , , , , |
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| Natura: | Dataset Open Access |
| Lingua: | en |
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PANGAEA
1995
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| _version_ | 1867171358667964416 |
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| author | Zhao, Meixun Beveridge, N Shackleton, Nicholas J Sarnthein, Michael Eglinton, Geoffrey |
| author_facet | Zhao, Meixun Beveridge, N Shackleton, Nicholas J Sarnthein, Michael Eglinton, Geoffrey |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The molecular stratigraphy of Biogeochemical Oceanic Flux Study core 31K (19°N, 20°10'W) and Ocean Drilling Program Hole 658C (20°45'N, 18°35'W) has been studied for C37 alkenone abundances over the past 80 ka at high resolution (~circa 200-500 years). The derived Uk 37' sea surface temperature record for both cores shows a range of temperatures from about 18°C during the last glacial to 21.5°C during the early Holocene. Both records also reveal changes in sea surface temperature as much as 2°-4°C over a few hundred years, which correlate well with similar abrupt climatic changes observed in cores from elsewhere in the NE Atlantic, associated with 'Heinrich events'. Our results indicate that meltwater produced by these ice-rafting events was transmitted southward by the Canary Current, where it had considerable impact on sea surface temperatures in the subtropical eastern Atlantic. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_729952 |
| institution | PANGAEA |
| language | en |
| publishDate | 1995 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Sea surface temperature calculation based on alkenones in sediments off northwest Africa Zhao, Meixun Beveridge, N Shackleton, Nicholas J Sarnthein, Michael Eglinton, Geoffrey 108-658C; Biogeochemical Ocean Flux Study; BOFS; BOFS31/1K; BOFS31#1; Canarias Sea; CD53; Charles Darwin; DRILL; Drilling/drill rig; Joides Resolution; KAL; Kasten corer; Leg108; Northeast Atlantic; Ocean Drilling Program; ODP The molecular stratigraphy of Biogeochemical Oceanic Flux Study core 31K (19°N, 20°10'W) and Ocean Drilling Program Hole 658C (20°45'N, 18°35'W) has been studied for C37 alkenone abundances over the past 80 ka at high resolution (~circa 200-500 years). The derived Uk 37' sea surface temperature record for both cores shows a range of temperatures from about 18°C during the last glacial to 21.5°C during the early Holocene. Both records also reveal changes in sea surface temperature as much as 2°-4°C over a few hundred years, which correlate well with similar abrupt climatic changes observed in cores from elsewhere in the NE Atlantic, associated with 'Heinrich events'. Our results indicate that meltwater produced by these ice-rafting events was transmitted southward by the Canary Current, where it had considerable impact on sea surface temperatures in the subtropical eastern Atlantic. |
| title | Sea surface temperature calculation based on alkenones in sediments off northwest Africa |
| topic | 108-658C; Biogeochemical Ocean Flux Study; BOFS; BOFS31/1K; BOFS31#1; Canarias Sea; CD53; Charles Darwin; DRILL; Drilling/drill rig; Joides Resolution; KAL; Kasten corer; Leg108; Northeast Atlantic; Ocean Drilling Program; ODP |
| url | https://doi.org/10.1594/PANGAEA.729952 |