Chilean Margin 33KYr Alkenone SST Reconstructions Kim, J.-H.; Schneider, R.R.; Hebbeln, D.; Mueller, P.J.; Wefer, G. Kim, J.-H. Schneider, R.R. Hebbeln, D. Mueller, P.J. Wefer, G. Sea Surface Temperature Reconstruction westerlies earth science/paleoclimate/paleoceanography (depth,null,null,meter,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (age,null,null,calendar kiloyear before present,null,paleoceanography,null,null,N,null) earth science/paleoclimate/climate reconstructions|paleoceanography (sea surface temperature,alkenone unsaturation index,null,degree Celsius,null,climate reconstructions|paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (alkenone unsaturation index Uk37 prime,null,null,dimensionless,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (sedimentation rate,null,null,centimeter per kiloyear,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean (GeoB3302-1>LATITUDE -33.2167>LONGITUDE -72.1) (GIK17748-2>LATITUDE -32.75>LONGITUDE -72.0333) Applying the alkenone method, we estimated sea-surface temperatures (SSTs) for the past 33 kyr in two marine sediment cores recovered from the continental slope off mid-latitude Chile. The SST record shows an increase of 6.7°C from the last ice age (LIA) to the Holocene climatic optimum, while the temperature contrast between LIA and modern temperatures is only about 3.4°C. The timing and magnitude of the last deglacial warming in the ocean correspond to those observed in South American continental records. According to our SST record, the existence of a Younger Dryas equivalent cooling in the Southeast Pacific is much more uncertain than for the continental climate changes. A warming step of about 2.5°C observed between 8 and 7.5 cal kyr BP may have been linked to the early to mid-Holocene climatic transition (8.2–7.8 cal kyr BP), also described from equatorial Africa and Antarctica. In principal, variations in the latitudinal position of the Southern Pacific Westerlies are considered to be responsible for SST changes in the Peru-Chile current off mid-latitude Chile. STUDY NOTES: Alkenone sea-surface temperature (SST) estimates for the past 33 kyr from two sediment cores collected from the continental slope off mid-latitude Chile. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Kim, J.-H. Investigator : Schneider, R.R. Investigator : Hebbeln, D. Investigator : Mueller, P.J. Investigator : Wefer, G. 2011-06-17 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/11206 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/kim2002b/kim2002b.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/kim2002b/kim2002b.xls https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/kim2002b/kim2002b.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/kim2002b/kim2002b.xls English https://www.ncdc.noaa.gov/paleo/study/11206 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/kim2002b/kim2002b.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/kim2002b/kim2002b.xls Kim, J.-H., R.R. Schneider, D. Hebbeln, P.J. Müller, and G. Wefer. 2002. Last deglacial sea-surface temperature evolution in the Southeast Pacific compared to climate changes on the South American continent. Quaternary Science Reviews, Vol. 21, pp. 2085-2097. START YEAR: 32680 cal yr BP * END YEAR: 1080 cal yr BP -72.1 -33.2167 -72.0333 -32.75