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Towards a new paleotemperature proxy from reef coral occurrences.

ABSTRACT: Global mean temperature is thought to have exceeded that of today during the last interglacial episode (LIG, ~ 125,000 yrs b.p.) but robust paleoclimate data are still rare in low latitudes. Occurrence data of tropical reef corals may provide new proxies of low latitude sea-surface temperatures. Using modern reef coral distributions we developed a geographically explicit model of sea surface temperatures. Applying this model to coral occurrence data of the LIG provides a latitudinal U-shaped pattern of temperature anomalies with cooler than modern temperatures around the equator and warmer subtropical climes. Our results agree with previously published estimates of LIG temperatures and suggest a poleward broadening of the habitable zone for reef corals during the LIG.

SUBMITTER: Lauchstedt A

PROVIDER: S-EPMC5585234 | biostudies-literature | 2017 Sep

REPOSITORIES: biostudies-literature

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Towards a new paleotemperature proxy from reef coral occurrences.

Lauchstedt Andreas A Pandolfi John M JM Kiessling Wolfgang W

Scientific reports 20170905 1

Global mean temperature is thought to have exceeded that of today during the last interglacial episode (LIG, ~ 125,000 yrs b.p.) but robust paleoclimate data are still rare in low latitudes. Occurrence data of tropical reef corals may provide new proxies of low latitude sea-surface temperatures. Using modern reef coral distributions we developed a geographically explicit model of sea surface temperatures. Applying this model to coral occurrence data of the LIG provides a latitudinal U-shaped pat ...[more]

PMID: 28874812

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