Zhao, Meixun; Beveridge, N; Shackleton, Nicholas J; Sarnthein, Michael; Eglinton, Geoffrey (1995): Sea surface temperature calculation based on alkenones in sediments off northwest Africa. PANGAEA, https://doi.org/10.1594/PANGAEA.729952, Supplement to: Zhao, M et al. (1995): Molecular stratigraphy, of cores off northwest Africa: Sea surface temperature history over the last 80 ka. Paleoceanography, 10(3), 661-675, https://doi.org/10.1029/94PA03354
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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.
Median Latitude: 19.873550 * Median Longitude: -19.371450 * South-bound Latitude: 18.997900 * West-bound Longitude: -20.162100 * North-bound Latitude: 20.749200 * East-bound Longitude: -18.580800
Date/Time Start: 1986-03-08T00:45:00 * Date/Time End: 1990-10-17T00:00:00
108-658C * Latitude: 20.749200 * Longitude: -18.580800 * Date/Time Start: 1986-03-08T00:45:00 * Date/Time End: 1986-03-08T16:00:00 * Elevation: -2273.0 m * Penetration: 72.9 m * Recovery: 70.38 m * Location: Canarias Sea * Campaign: Leg108 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 8 cores; 72.9 m cored; 0 m drilled; 96.5 % recovery
BOFS31/1K (BOFS31#1) * Latitude: 18.997900 * Longitude: -20.162100 * Date/Time: 1990-10-17T00:00:00 * Elevation: -3300.0 m * Location: Northeast Atlantic * Campaign: CD53 * Basis: Charles Darwin * Method/Device: Kasten corer (KAL) * Comment: BOFS-ID 18537
Datasets listed in this publication series
- Zhao, M; Beveridge, N; Shackleton, NJ et al. (1995): (Table A1) Alkenones and calculated sea surface temparature of ODP Hole 108-658C. https://doi.org/10.1594/PANGAEA.52711
- Zhao, M; Beveridge, N; Shackleton, NJ et al. (1997): (Table A2) Alkenones and calculated sea surface temperature of sediment core BOFS31/1K. https://doi.org/10.1594/PANGAEA.52712