noaa-ocean-23370 Global Alkenone UK37 Surface Sediment Database Tierney, J.E.; Tingley, M.P. Global Alkenone UK37 Surface Sediment Database 2018-02-01 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/23370 Investigator J.E. Tierney Investigator M.P. Tingley 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 biomarkers geoscientificInformation 100 cal yr BP 0 cal yr BP Complete -80 90 -180 180 Geographic Region Global Ocean Global Ocean>LATITUDE >LONGITUDE None Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site. English DOC/NOAA/NESDIS/NCEI National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce https://www.ncdc.noaa.gov/data-access/paleoclimatology-data DATA Center Contact Bruce Bauer bruce.a.bauer@noaa.gov paleo@noaa.gov 303-497-6280 303-497-6513

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Boulder CO 80305-3328 USA online ASCII Jessica E. Tierney and Martin P. Tingley 2018 Paleoceanography and Paleoclimatology 33 3 281-301 10.1002/2017PA003201 https://agupubs.onlinelibrary.wiley.com/doi/10.1002/2017PA003201

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.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/tierney2018/tierney2018uk37.txt NOAA Template File; Global Alkenone UK37 Surface Sediment Database USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11