(Table 1) Sea surface temperature reconstruction for eastern equatorial Pacific surface sediment samples, supplement to: Kienast, Markus; MacIntyre, G; Dubois, Nathalie; Higginson, S; Normandeau, Claire; Chazen, S; Herbert, Timothy D (2012): Alkenone unsaturation in surface sediments from the eastern equatorial Pacific: Implications for SST reconstructions. Paleoceanography, 27(1), PA1210


Significant uncertainties persist in the reconstruction of past sea surface temperatures in the eastern equatorial Pacific, especially regarding the amplitude of the glacial cooling and the details of the post-glacial warming. Here we present the first regional calibration of alkenone unsaturation in surface sediments versus mean annual sea surface temperatures (maSST). Based on 81 new and 48 previously published data points, it is shown that open ocean samples conform to established global regressions of Uk'37 versus maSST and that there is no systematic bias from seasonality in the production or export of alkenones, or from surface ocean nutrient concentrations or salinity. The flattening of the regression at the highest maSSTs is found to be statistically insignificant. For the near-coastal Peru upwelling zone between 11-15°S and 76-79°W, however, we corroborate earlier observations that Uk'37 SST estimates significantly over-estimate maSSTs at many sites. We posit that this is caused either by uncertainties in the determination of maSSTs in this highly dynamic environment, or by biasing of the alkenone paleothermometer toward El Niño events as postulated by Rein et al. (2005).

DOI https://doi.org/10.1594/PANGAEA.827244
Related Identifier https://doi.org/10.1029/2011PA002254
Related Identifier https://doi.org/10.1029/2000GL012024
Related Identifier https://doi.org/10.1029/2005GC001054
Related Identifier https://doi.org/10.1029/2009PA001781
Related Identifier https://doi.org/10.1029/2010GL046324
Related Identifier https://doi.org/10.1029/2006GL025948
Related Identifier https://doi.org/10.1029/2008PA001593
Related Identifier https://doi.org/10.1038/nature05578
Related Identifier https://doi.org/10.1038/nature02338
Related Identifier https://doi.org/10.1016/j.gca.2005.08.023
Related Identifier https://doi.org/10.1029/2004PA001099
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.827244
Creator Kienast, Markus; MacIntyre, G; Dubois, Nathalie; Higginson, S; Normandeau, Claire; Chazen, S; Herbert, Timothy D
Publisher PANGAEA - Data Publisher for Earth & Environmental Science
Publication Year 2012
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Language English
Resource Type Supplementary Dataset; Dataset
Format text/tab-separated-values
Size 631 data points
Discipline Earth System Research
Spatial Coverage (-135.080W, -18.085S, -72.700E, 15.710N); Eastern Equatorial Pacific; South Pacific Ocean; World Ocean; Pacific Ocean; Panama Basin; Cocos Ridge; South-East Pacific; Equatorial East Pacific
Temporal Coverage Begin 1963-04-05T00:00:00Z
Temporal Coverage End 2009-03-29T00:00:00Z