Interhemispheric synchrony of Mid-Late Holocene SST in the Indo-Pacific warm pool linked to upper water column dynamics

IF 3.2 1区地球科学 Q1 GEOGRAPHY, PHYSICAL

Quaternary Science Reviews Pub Date : 2024-11-09 DOI:10.1016/j.quascirev.2024.109064

Xuefei Chen , Wenfeng Deng , Jian-xin Zhao , Gangjian Wei

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Abstract

The sea surface temperature (SST) of the Indo-Pacific warm pool (IPWP) plays a crucial role in global climate system. Despite its importance, knowledge of its SST changes over century to millennial timescales remains limited and controversial, hindering our comprehensive understanding of climate change mechanisms. Our study bridges this gap with a novel SST reconstruction spanning approximately 7000 years, derived by aggregating 75 coral Sr/Ca-SST records from the South China Sea. These records reveal a notable synchronization in SST variations with foraminiferal reconstructions across the IPWP, reflecting a prevalent pattern of interhemispheric cooling and multi-century variability in the IPWP during the Mid-Late Holocene. Further analysis reveals that these (sub)millennial SST variations are closely linked to subsurface water temperature and ocean heat content (OHC) changes, supporting the theory that the release of deeper OHC acted as a heat source for low-latitude processes during the Holocene.

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印度洋-太平洋暖池内全新世中晚期海温的半球间同步性与上层水柱动力学有关

印度洋-太平洋暖池（IPWP）的海面温度（SST）在全球气候系统中发挥着至关重要的作用。尽管印度洋-太平洋暖池非常重要，但人们对其百年到千年时间尺度的海表温度变化的了解仍然有限，而且存在争议，这阻碍了我们对气候变化机制的全面了解。我们的研究通过汇总南海 75 条珊瑚 Sr/Ca-SST 记录，重建了跨越约 7000 年的新 SST，弥补了这一空白。这些记录揭示了整个 IPWP 地区的 SST 变化与有孔虫重建的显著同步性，反映了 IPWP 地区在全新世中晚期的半球间冷却和多世纪变异的普遍模式。进一步的分析表明，这些（亚）千年海温变化与次表层水温和海洋热含量（OHC）变化密切相关，支持了全新世期间深层 OHC 释放成为低纬度过程热源的理论。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Quaternary Science Reviews 地学-地球科学综合

CiteScore

7.50

自引率

15.00%

发文量

388

审稿时长

3 months

期刊介绍： Quaternary Science Reviews caters for all aspects of Quaternary science, and includes, for example, geology, geomorphology, geography, archaeology, soil science, palaeobotany, palaeontology, palaeoclimatology and the full range of applicable dating methods. The dividing line between what constitutes the review paper and one which contains new original data is not easy to establish, so QSR also publishes papers with new data especially if these perform a review function. All the Quaternary sciences are changing rapidly and subject to re-evaluation as the pace of discovery quickens; thus the diverse but comprehensive role of Quaternary Science Reviews keeps readers abreast of the wider issues relating to new developments in the field.