Eastern Equatorial Pacific 5 Myr Alkenone SST and Paleoproductivity Reconstruction Lawrence, K.T.; Liu, Z.; Herbert, T.D. Lawrence, K.T. Liu, Z. Herbert, T.D. Sea Surface Temperature Reconstruction earth science/paleoclimate/paleoceanography (age,null,null,radiocarbon year 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 (C37 alkenone,null,null,nanomole per gram,null,paleoceanography,null,null,N,null) 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 (ODP 846>LATITUDE -3.095>LONGITUDE -90.81833) A tropical Pacific climate state resembling that of a permanent El Niņo is hypothesized to have ended as a result of a reorganization of the ocean heat budget ~3 million years ago, a time when large ice sheets appeared in the high latitudes of the Northern Hemisphere. We report a high-resolution alkenone reconstruction of conditions in the heart of the eastern equatorial Pacific (EEP) cold tongue that reflects the combined influences of changes in the equatorial thermocline, the properties of the thermocline's source waters, atmospheric greenhouse gas content, and orbital variations on sea surface temperature (SST) and biological productivity over the past 5 million years. Our data indicate that the intensification of Northern Hemisphere glaciation ~3 million years ago did not interrupt an almost monotonic cooling of the EEP during the Plio-Pleistocene. SST and productivity in the eastern tropical Pacific varied in phase with global ice volume changes at a dominant 41,000-year (obliquity) frequency throughout this time. Changes in the Southern Hemisphere most likely modulated most of the changes observed. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Lawrence, K.T. Investigator : Liu, Z. Investigator : Herbert, T.D. 2006-07-01 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/2648 https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/odp846l6-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lawrence2006 https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/odp846l6-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lawrence2006 English https://www.ncdc.noaa.gov/paleo/study/2648 https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/odp846l6-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lawrence2006 Lawrence, K.T., Z. Liu and T.D. Herbert2006Evolution of the Eastern Tropical Pacific Through Plio-Pleistocene GlaciationScience START YEAR: 5089802 14C yr BP * END YEAR: 5228 14C yr BP -90.81833 -3.095 -90.81833 -3.095