The molecular stratigraphy of BOFS core 31K and ODP Hole 658C has been studied
for C37 alkenone abundances over the past 80 ka at high resolution (~circa
200-500 years). The derived Uk37 sea surface temperature record for both
cores shows a range of temperatures from about 18C during the last glacial to
21.5C during the early Holocene. Both records also reveal changes in SST as
much as 2C - 4C 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 SSTs in the subtropical eastern Atlantic.
Purpose:
Not Available
Supplemental_Information:
REFERENCE:
Zhao, M., N.A.S. Beveridge, N.J. Shackleton, M. Sarnthein, and G. Eglinton.
1995. Molecular stratigraphy of cores off northwest Africa: Sea surface
temperature history over the last 80 ka. Paleoceanography. 10(3): 661-675.
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Description_of_Geographic_Extent:
Bounding_Coordinates:
West_Bounding_Coordinate: -18.35
East_Bounding_Coordinate: -18.35
North_Bounding_Coordinate: 20.45
South_Bounding_Coordinate: 20.45
Spatial_Domain:
Description_of_Geographic_Extent:
Bounding_Coordinates:
West_Bounding_Coordinate: -20.1
East_Bounding_Coordinate: -20.1
North_Bounding_Coordinate: 19.0
South_Bounding_Coordinate: 19.0
Keywords:
Theme:
Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS
Theme_Keyword_Thesaurus: PROJECT
Theme_Keyword_Thesaurus: ANCILLARY KEYWORDS
Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY
Theme_Keyword_Thesaurus: DATA SET LANGUAGE
Theme_Keyword: EARTH SCIENCE > PALEOCLIMATE > LAND RECORDS > GLACIATION
Theme_Keyword: EARTH SCIENCE > PALEOCLIMATE > OCEAN/LAKE RECORDS > SEDIMENTS
