Global Alkenone UK37 Surface Sediment Database Tierney, J.E.; Tingley, M.P. Tierney, J.E. Tingley, M.P. earth science/paleoclimate/paleoceanography (notes,null,null,null,null,paleoceanography,null,null,C,doi link to the reference) earth science/paleoclimate/paleoceanography (notes,null,null,null,null,paleoceanography,null,null,C,notes concerning data handling. In some cases data were backcalculated from published SST values and calibrations or averaged across multiple cms in the same core.) earth science/paleoclimate/paleoceanography (alkenone unsaturation index Uk37 prime,null,null,dimensionless,null,paleoceanography,null,null,N,index from 0-1) earth science/paleoclimate/paleoceanography (sample identification,null,null,null,null,paleoceanography,null,null,C,name of core site) earth science/paleoclimate/paleoceanography (longitude,null,null,degree east,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (collection water depth,null,null,meter,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (depth at sample start,null,null,centimeter,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (notes,null,null,null,null,paleoceanography,null,null,N,flag for inclusion in calibration: 1 = included; 0 = excluded) earth science/paleoclimate/paleoceanography (notes,null,null,null,null,paleoceanography,null,null,C,core type: GGC = giant gravity core; grab = grab sample; PC = piston core; MC = multicore; JPC = jumbo piston core; TriggerW = trigger core; BC = box core; GBC = giant box core; drill = drill core) earth science/paleoclimate/paleoceanography (notes,null,null,null,null,paleoceanography,null,null,C,shorthand name for the original source reference) earth science/paleoclimate/paleoceanography (depth at sample end,null,null,centimeter,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (latitude,null,null,degree north,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleocean (Global Ocean>LATITUDE >LONGITUDE ) The alkenone‐based UK'37 proxy is a cornerstone of paleoclimatology, providing insight into the temperature history of the Earth's surface ocean. Although the relationship between UK'37 and sea surface temperatures (SSTs) is robust and well supported by experimental data, there remain outstanding issues regarding the seasonality of production of alkenones and the response of UK'37 at very warm and cold SSTs. Using a data set of over 1,300 core‐top UK'37 measurements, we find compelling evidence of seasonal production in the North Atlantic, North Pacific, and Mediterranean Oceans. We also find significant attenuation of the UK'37 response to SST at warm temperatures (>24C), with the slope reduced by nearly 50% as UK'37 approaches unity. To account for these observations in a calibration, we develop a new Bayesian B‐spline regression model, BAYSPLINE, for theUK'37 paleothermometer. BAYSPLINE produces similar estimates as previous calibrations below ~24 degrees, but above this point it predicts larger SST changes, in accordance with the attenuation of the UK'37 response. Example applications of BAYSPLINE demonstrate that its treatment of seasonality and slope attenuation improves paleoclimatic interpretations, with important consequences for the inference of SSTs in the tropical oceans. BAYSPLINE facilitates a probabilistic approach to paleoclimate, building upon growing efforts to develop more formalized statistical frameworks for paleoceanographic reconstruction. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Tierney, J.E. Investigator : Tingley, M.P. 2018-02-01 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/23370 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/tierney2018/tierney2018uk37.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/tierney2018/tierney2018uk37.txt English https://www.ncdc.noaa.gov/paleo/study/23370 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/tierney2018/tierney2018uk37.txt Jessica E. Tierney and Martin P. Tingley2018BAYSPLINE: A new calibration for the alkenone paleothermometerPaleoceanography and Paleoclimatology333281-30110.1002/2017PA003201https://agupubs.onlinelibrary.wiley.com/doi/10.1002/2017PA003201 START YEAR: 100 cal yr BP * END YEAR: 0 cal yr BP -180 -80 180 90