A multiproxy study of past environmental changes in the Sea of Okhotsk during the last 1.5 Ma

Julie Lattaud; Li Lo; Christian Zeeden; Ya Jun Liu; Sheng Rong Song; Marcel T.J. van der Meer; Jaap S. Sinninghe Damsté; Stefan Schouten

doi:10.1016/j.orggeochem.2019.04.003

A multiproxy study of past environmental changes in the Sea of Okhotsk during the last 1.5 Ma

Julie Lattaud^*, Li Lo, Christian Zeeden, Ya Jun Liu, Sheng Rong Song, Marcel T.J. van der Meer, Jaap S. Sinninghe Damsté, Stefan Schouten

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

Long-chain diols have been detected in a wide range of environments and have been used to reconstruct past environmental changes, however only a few long-term records exist to date. Here we reconstructed past environmental changes in the central Sea of Okhotsk over the last 1.5 million years, covering the Mid-Pleistocene Transition (MPT). Sea surface temperatures (SST) reconstructed using the Long-Chain Diol Index (LDI) reflects glacial/interglacial changes. However, when compared with other organic paleothermometers (U^k′ ₃₇ and TEX^L ₈₆) the LDI-SST is lower during interglacials and similar or higher during glacials, possibly suggesting a shift of diol production season during interglacials. The LDI-SST does not change in periodicity around the MPT as observed for the TEX^L ₈₆, likely due to this seasonal shift. Diatom productivity, as recorded by 1,14-diols and biogenic opal content, increased during the main deglaciations with a succession from Proboscia diatoms to diatoms with a more heavily silicified shell, confirming that primary productivity in the central Sea of Okhotsk is driven by sea-ice progress and retreat. In contrast to the LDI-SST, the 1,14-diols record shows a change in periodicity around the MPT from 41- to 100-kyr cycle, suggesting an influence of orbital parameters on diatom productivity. In the central Sea of Okhotsk, the relative amount of C₃₂ 1,15-diol (F_{C32 1,15}), a proxy for riverine input, correlates with sea-level change with more riverine-derived material reaching the core site when the Amur River mouth is closer at lower sea-levels. In agreement, F_{C32 1,15} shows a change in periodicity during the MPT, with the appearance of a 100-kyr cycle. Our results show that the long chain diols can provide important paleoceanographic information in subpolar environments over long time scales, but that temperature reconstructions can be severely impacted by changes in seasonality.

Original language	English
Pages (from-to)	50-61
Number of pages	12
Journal	Organic Geochemistry
Volume	132
DOIs	https://doi.org/10.1016/j.orggeochem.2019.04.003
Publication status	Published - Jun 2019

Funding

We thank two anonymous reviewers and the associate editor I. Castañeda for their useful comments on this manuscript. We thank Denise Dorhout, Jort Ossebaar and Anchelique Mets for technical assistance and Rick Hennekam for discussion on the spectral analysis. This research has been funded by the European Research Council (ERC) under the European Union's Seventh Framework Program (FP7/2007-2013) ERC grant agreement [339206] to S.S. The work was further supported by funding from the Netherlands Earth System Science Center ( NESSC ) through a gravitation grant (NWO 024.002.001) from the Dutch Ministry for Education, Culture and Science to JSSD and SS. L.L. was supported by grants of National Natural Science Foundation of China ( 41773116 ), State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences start-up fund and 135 project (SKLaBIG-QD- 16-04 and 135PY201605) and the Ministry of Science and Technology ( MOST ), Taiwan ROC ( 104-2917-I-564-046 ). Samples of core MD01-2414 were generously provided by Taiwan Ocean Research Institute (TORI). Data are available at Pangaea (doi: https://doi.org/10.1594/PANGAEA.896775 ). Appendix A

Keywords

Biogenic opal
LDI
Long-chain diols
Mid-Pleistocene Transition
Sea of Okhotsk
TEX
U

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@article{c59f5f4ba5ef4444a68613c4de643cb1,

title = "A multiproxy study of past environmental changes in the Sea of Okhotsk during the last 1.5 Ma",

abstract = "Long-chain diols have been detected in a wide range of environments and have been used to reconstruct past environmental changes, however only a few long-term records exist to date. Here we reconstructed past environmental changes in the central Sea of Okhotsk over the last 1.5 million years, covering the Mid-Pleistocene Transition (MPT). Sea surface temperatures (SST) reconstructed using the Long-Chain Diol Index (LDI) reflects glacial/interglacial changes. However, when compared with other organic paleothermometers (Uk′ 37 and TEXL 86) the LDI-SST is lower during interglacials and similar or higher during glacials, possibly suggesting a shift of diol production season during interglacials. The LDI-SST does not change in periodicity around the MPT as observed for the TEXL 86, likely due to this seasonal shift. Diatom productivity, as recorded by 1,14-diols and biogenic opal content, increased during the main deglaciations with a succession from Proboscia diatoms to diatoms with a more heavily silicified shell, confirming that primary productivity in the central Sea of Okhotsk is driven by sea-ice progress and retreat. In contrast to the LDI-SST, the 1,14-diols record shows a change in periodicity around the MPT from 41- to 100-kyr cycle, suggesting an influence of orbital parameters on diatom productivity. In the central Sea of Okhotsk, the relative amount of C32 1,15-diol (FC32 1,15), a proxy for riverine input, correlates with sea-level change with more riverine-derived material reaching the core site when the Amur River mouth is closer at lower sea-levels. In agreement, FC32 1,15 shows a change in periodicity during the MPT, with the appearance of a 100-kyr cycle. Our results show that the long chain diols can provide important paleoceanographic information in subpolar environments over long time scales, but that temperature reconstructions can be severely impacted by changes in seasonality.",

keywords = "Biogenic opal, LDI, Long-chain diols, Mid-Pleistocene Transition, Sea of Okhotsk, TEX, U",

author = "Julie Lattaud and Li Lo and Christian Zeeden and Liu, {Ya Jun} and Song, {Sheng Rong} and {van der Meer}, {Marcel T.J.} and {Sinninghe Damst{\'e}}, {Jaap S.} and Stefan Schouten",

year = "2019",

month = jun,

doi = "10.1016/j.orggeochem.2019.04.003",

language = "English",

volume = "132",

pages = "50--61",

journal = "Organic Geochemistry",

issn = "0146-6380",

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T1 - A multiproxy study of past environmental changes in the Sea of Okhotsk during the last 1.5 Ma

AU - Lattaud, Julie

AU - Lo, Li

AU - Zeeden, Christian

AU - Liu, Ya Jun

AU - Song, Sheng Rong

AU - van der Meer, Marcel T.J.

AU - Sinninghe Damsté, Jaap S.

AU - Schouten, Stefan

PY - 2019/6

Y1 - 2019/6

N2 - Long-chain diols have been detected in a wide range of environments and have been used to reconstruct past environmental changes, however only a few long-term records exist to date. Here we reconstructed past environmental changes in the central Sea of Okhotsk over the last 1.5 million years, covering the Mid-Pleistocene Transition (MPT). Sea surface temperatures (SST) reconstructed using the Long-Chain Diol Index (LDI) reflects glacial/interglacial changes. However, when compared with other organic paleothermometers (Uk′ 37 and TEXL 86) the LDI-SST is lower during interglacials and similar or higher during glacials, possibly suggesting a shift of diol production season during interglacials. The LDI-SST does not change in periodicity around the MPT as observed for the TEXL 86, likely due to this seasonal shift. Diatom productivity, as recorded by 1,14-diols and biogenic opal content, increased during the main deglaciations with a succession from Proboscia diatoms to diatoms with a more heavily silicified shell, confirming that primary productivity in the central Sea of Okhotsk is driven by sea-ice progress and retreat. In contrast to the LDI-SST, the 1,14-diols record shows a change in periodicity around the MPT from 41- to 100-kyr cycle, suggesting an influence of orbital parameters on diatom productivity. In the central Sea of Okhotsk, the relative amount of C32 1,15-diol (FC32 1,15), a proxy for riverine input, correlates with sea-level change with more riverine-derived material reaching the core site when the Amur River mouth is closer at lower sea-levels. In agreement, FC32 1,15 shows a change in periodicity during the MPT, with the appearance of a 100-kyr cycle. Our results show that the long chain diols can provide important paleoceanographic information in subpolar environments over long time scales, but that temperature reconstructions can be severely impacted by changes in seasonality.

AB - Long-chain diols have been detected in a wide range of environments and have been used to reconstruct past environmental changes, however only a few long-term records exist to date. Here we reconstructed past environmental changes in the central Sea of Okhotsk over the last 1.5 million years, covering the Mid-Pleistocene Transition (MPT). Sea surface temperatures (SST) reconstructed using the Long-Chain Diol Index (LDI) reflects glacial/interglacial changes. However, when compared with other organic paleothermometers (Uk′ 37 and TEXL 86) the LDI-SST is lower during interglacials and similar or higher during glacials, possibly suggesting a shift of diol production season during interglacials. The LDI-SST does not change in periodicity around the MPT as observed for the TEXL 86, likely due to this seasonal shift. Diatom productivity, as recorded by 1,14-diols and biogenic opal content, increased during the main deglaciations with a succession from Proboscia diatoms to diatoms with a more heavily silicified shell, confirming that primary productivity in the central Sea of Okhotsk is driven by sea-ice progress and retreat. In contrast to the LDI-SST, the 1,14-diols record shows a change in periodicity around the MPT from 41- to 100-kyr cycle, suggesting an influence of orbital parameters on diatom productivity. In the central Sea of Okhotsk, the relative amount of C32 1,15-diol (FC32 1,15), a proxy for riverine input, correlates with sea-level change with more riverine-derived material reaching the core site when the Amur River mouth is closer at lower sea-levels. In agreement, FC32 1,15 shows a change in periodicity during the MPT, with the appearance of a 100-kyr cycle. Our results show that the long chain diols can provide important paleoceanographic information in subpolar environments over long time scales, but that temperature reconstructions can be severely impacted by changes in seasonality.

KW - Biogenic opal

KW - LDI

KW - Long-chain diols

KW - Mid-Pleistocene Transition

KW - Sea of Okhotsk

KW - TEX

KW - U

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U2 - 10.1016/j.orggeochem.2019.04.003

DO - 10.1016/j.orggeochem.2019.04.003

M3 - Article

AN - SCOPUS:85064561826

SN - 0146-6380

VL - 132

SP - 50

EP - 61

JO - Organic Geochemistry

JF - Organic Geochemistry

ER -

A multiproxy study of past environmental changes in the Sea of Okhotsk during the last 1.5 Ma

Abstract

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A multiproxy study of past environmental changes in the Sea of Okhotsk during the last 1.5 Ma

Abstract

Funding

Keywords

Access to Document

Other files and links

Fingerprint

Cite this

A multiproxy study of past environmental changes in the Sea of Okhotsk during the last 1.5 Ma