Southeast Pacific SST Reconstruction Lamy, F.; Rühlemann, C.; Hebbeln, D.; Wefer, G. Lamy, F. Rühlemann, C. Hebbeln, D. Wefer, G. Sea Surface Temperature Reconstruction earth science/paleoclimate/paleoceanography (biogenic silica,sediment,null,percent,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (delta 18O,Neogloboquadrina pachyderma dextral,null,per mil PDB,null,paleoceanography,null,null,N,null) earth science/paleoclimate/climate reconstructions|paleoceanography (salinity,alkenone unsaturation index|delta 18O|sea surface,null,practical salinity unit,null,climate reconstructions|paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (organic carbon,sediment,null,weight percent,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 (age,null,null,radiocarbon year before present,null,paleoceanography,null,null,N,C1) earth science/paleoclimate/paleoceanography (iron,sediment,null,count per second,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (age,null,null,calendar year before present,null,paleoceanography,null,null,N,C2) earth science/paleoclimate/paleoceanography (depth,null,null,centimeter,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean (GeoB 3313-1>LATITUDE -41>LONGITUDE -74.45) We reconstructed changes of temperature, salinity, and productivity within the southern Peru-Chile Current during the last 8000 years from a high-resolution sediment core recovered at 41°S using alkenones, isotope ratios of planktic foraminifera, biogenic opal, and organic carbon. Paleotemperatures and paleosalinities reached maximum values at ~5500 years ago and thereafter declined to modern values, whereas paleoproductivity continuously increased throughout the last 8000 years. We ascribe these long-term Holocene trends primarily to latitudinal shifts of the Antarctic Circumpolar Current (ACC). The concurrence with shifts in the position of the Southern Westerlies points to a common response of atmospheric and oceanographic circulation patterns off southern Chile. Millennial- to centennial-scale fluctuations of paleotemperatures and paleosalinities, on the other hand, lag displacements in the position of the Southern Westerlies but reveal a significant correlation to short-term temperature changes in Antarctica, indicating a high-latitude control of the ACC at these timescales. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Lamy, F. Investigator : Rühlemann, C. Investigator : Hebbeln, D. Investigator : Wefer, G. 2002-07-01 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/2571 https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/gb3313-1-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lamy2002 https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/gb3313-1-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lamy2002 English https://www.ncdc.noaa.gov/paleo/study/2571 https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/gb3313-1-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lamy2002 Lamy, F., C. Rühlemann, D. Hebbeln, and G. Wefer. 2002. High- and low-latitude climate control on the position of the southern Peru-Chile Current during the Holocene. Paleoceanography 17(2):1028. Lamy, F., D. Hebbeln, U. Röhl, and G. Wefer. 2001. Holocene rainfall variability in southern Chile: a marine record of latitudinal shifts of the Southern Westerlies. Earth and Planetary Science Letters 185(3-4):369-382. START YEAR: 6170 14C yr BP * END YEAR: 195 14C yr BP -74.45 -41 -74.45 -41