Organic proxies and paleotemperature records of the central Sea of Okhotsk ...

• Main Authors: Lattaud, Julie, Lo, Li, Huang, Jyh-Jaan, Chou, Yu-Min, Gorbarenko, Sergey A, Sinninghe Damsté, Jaap S, Schouten, Stefan
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2018
• Subjects: Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.890820; https://doi.pangaea.de/10.1594/PANGAEA.890820

The long-chain diol index (LDI) is a new organic sea surface temperature (SST) proxy based on the distribution of long-chain diols. It has been applied in several environments but not yet in subpolar regions. Here, we tested the LDI on surface sediments and a sediment core from the Sea of Okhotsk, which is the southernmost seasonal sea ice covered region in the Northern Hemisphere, and compared it with other organic temperature proxies, i.e. Uk'37 and TEXL86. In the surface sediments, the LDI is correlated with autumn sea surface temperature, similar to the Uk'37 but different from the TEXL86 that correlates best with summer sea subsurface temperature. Remarkably, the obtained local LDI calibration was significantly different from the global core-top calibration. We used the local LDI calibration to reconstruct past SST changes in the central Sea of Okhotsk. The LDI-SST record shows low glacial (Marine Isotope Stage, MIS 2, 4, 6) and high interglacial (MIS 1 and MIS 5) temperatures and follows the same ... : Supplement to: Lattaud, Julie; Lo, Li; Huang, Jyh-Jaan; Chou, Yu-Min; Gorbarenko, Sergey A; Sinninghe Damsté, Jaap S; Schouten, Stefan (2018): A comparison of Late Quaternary organic proxy-based paleotemperature records of the Central Sea of Okhotsk. Paleoceanography and Paleoclimatology, 33, 732-744 ...