Sea surface temperature calculated from UK37 and UK'37 in the Pacific sector of the Southern Ocean ...

• Main Authors: Ho, Sze Ling, Mollenhauer, Gesine, Lamy, Frank, Martínez‐García, Alfredo, Mohtadi, Mahyar, Gersonde, Rainer, Hebbeln, Dierk, Nunez-Ricardo, Samuel, Rosell-Melé, Antoni, Tiedemann, Ralf
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2012
• Subjects: Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo; Southern Ocean
• Online Access: https://dx.doi.org/10.1594/pangaea.792642; https://doi.pangaea.de/10.1594/PANGAEA.792642

In spite of the important role played by the Southern Ocean in global climate, the few existing paleoceanographic records in the east Pacific sector do not extend beyond one glacial-interglacial cycle, hindering circumpolar comparison of past sea surface temperature (SST) evolution in the Southern Ocean. Here we present three alkenone-based Pleistocene SST records from the subantarctic and subtropical Pacific. We use a regional core top calibration data set to constrain the choice of calibrations for paleo SST estimation. Our core top data confirm that the alkenone-based UK37 and UK'37 values correlate linearly with the SST, in a similar fashion as the most commonly used laboratory culture-based calibrations even at low temperatures (down to ~1°C), rendering these calibrations appropriate for application in the subantarctic Pacific. However, these alkenone indices yield diverging temporal trends in the Pleistocene SST records. On the basis of the better agreement with d18O records and other SST records in ... : Supplement to: Ho, Sze Ling; Mollenhauer, Gesine; Lamy, Frank; Martínez‐García, Alfredo; Mohtadi, Mahyar; Gersonde, Rainer; Hebbeln, Dierk; Nunez-Ricardo, Samuel; Rosell-Melé, Antoni; Tiedemann, Ralf (2012): Sea surface temperature variability in the Pacific sector of the Southern Ocean over the past 700 kyr. Paleoceanography, 27, PA4202 ...