Reconstruction of deglacial sea surface temperatures in the tropical Pacific from selective analysis of a fossil coral

N  Allison; A A  Finch; A W  Tudhope; M  Newville; S R  Sutton; R M  Ellam

doi:10.1029/2005GL023183

Reconstruction of deglacial sea surface temperatures in the tropical Pacific from selective analysis of a fossil coral

N Allison, A A Finch, A W Tudhope, M Newville, S R Sutton, R M Ellam

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

Abstract

The Sr/Ca of coral skeletons demonstrates potential as an indicator of sea surface temperatures (SSTs). However, the glacial-interglacial SST ranges predicted from Sr/Ca of fossil corals are usually higher than from other marine proxies. We observed infilling of secondary aragonite, characterised by high Sr/Ca ratios, along intraskeletal pores of a fossil coral from Papua New Guinea that grew during the penultimate deglaciation (130 +/- 2 ka). Selective microanalysis of unaltered areas of the fossil coral indicates that SSTs at similar to 130 ka were <= 1 degrees C cooler than at present in contrast with bulk measurements ( combining infilled and unaltered areas) which indicate a difference of 6-7 degrees C. The analysis of unaltered areas of fossil skeletons by microprobe techniques may offer a route to more accurate reconstruction of past SSTs.

Original language	English
Pages (from-to)	L17609
Number of pages	4
Journal	Geophysical Research Letters
Volume	32
DOIs	https://doi.org/10.1029/2005GL023183
Publication status	Published - 13 Sept 2005

Keywords

SR COORDINATION
PALEOTEMPERATURE PROXY
SYMBIOTIC CORAL
X-RAY
ARAGONITE
DIAGENESIS
STRONTIUM
RECORDS
SR/CA
CONSEQUENCES

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1029/2005GL023183

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title = "Reconstruction of deglacial sea surface temperatures in the tropical Pacific from selective analysis of a fossil coral",

abstract = "The Sr/Ca of coral skeletons demonstrates potential as an indicator of sea surface temperatures (SSTs). However, the glacial-interglacial SST ranges predicted from Sr/Ca of fossil corals are usually higher than from other marine proxies. We observed infilling of secondary aragonite, characterised by high Sr/Ca ratios, along intraskeletal pores of a fossil coral from Papua New Guinea that grew during the penultimate deglaciation (130 +/- 2 ka). Selective microanalysis of unaltered areas of the fossil coral indicates that SSTs at similar to 130 ka were <= 1 degrees C cooler than at present in contrast with bulk measurements ( combining infilled and unaltered areas) which indicate a difference of 6-7 degrees C. The analysis of unaltered areas of fossil skeletons by microprobe techniques may offer a route to more accurate reconstruction of past SSTs.",

keywords = "SR COORDINATION, PALEOTEMPERATURE PROXY, SYMBIOTIC CORAL, X-RAY, ARAGONITE, DIAGENESIS, STRONTIUM, RECORDS, SR/CA, CONSEQUENCES",

author = "N Allison and Finch, {A A} and Tudhope, {A W} and M Newville and Sutton, {S R} and Ellam, {R M}",

year = "2005",

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doi = "10.1029/2005GL023183",

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T1 - Reconstruction of deglacial sea surface temperatures in the tropical Pacific from selective analysis of a fossil coral

AU - Allison, N

AU - Finch, A A

AU - Tudhope, A W

AU - Newville, M

AU - Sutton, S R

AU - Ellam, R M

PY - 2005/9/13

Y1 - 2005/9/13

N2 - The Sr/Ca of coral skeletons demonstrates potential as an indicator of sea surface temperatures (SSTs). However, the glacial-interglacial SST ranges predicted from Sr/Ca of fossil corals are usually higher than from other marine proxies. We observed infilling of secondary aragonite, characterised by high Sr/Ca ratios, along intraskeletal pores of a fossil coral from Papua New Guinea that grew during the penultimate deglaciation (130 +/- 2 ka). Selective microanalysis of unaltered areas of the fossil coral indicates that SSTs at similar to 130 ka were <= 1 degrees C cooler than at present in contrast with bulk measurements ( combining infilled and unaltered areas) which indicate a difference of 6-7 degrees C. The analysis of unaltered areas of fossil skeletons by microprobe techniques may offer a route to more accurate reconstruction of past SSTs.

AB - The Sr/Ca of coral skeletons demonstrates potential as an indicator of sea surface temperatures (SSTs). However, the glacial-interglacial SST ranges predicted from Sr/Ca of fossil corals are usually higher than from other marine proxies. We observed infilling of secondary aragonite, characterised by high Sr/Ca ratios, along intraskeletal pores of a fossil coral from Papua New Guinea that grew during the penultimate deglaciation (130 +/- 2 ka). Selective microanalysis of unaltered areas of the fossil coral indicates that SSTs at similar to 130 ka were <= 1 degrees C cooler than at present in contrast with bulk measurements ( combining infilled and unaltered areas) which indicate a difference of 6-7 degrees C. The analysis of unaltered areas of fossil skeletons by microprobe techniques may offer a route to more accurate reconstruction of past SSTs.

KW - SR COORDINATION

KW - PALEOTEMPERATURE PROXY

KW - SYMBIOTIC CORAL

KW - X-RAY

KW - ARAGONITE

KW - DIAGENESIS

KW - STRONTIUM

KW - RECORDS

KW - SR/CA

KW - CONSEQUENCES

UR - http://www.scopus.com/inward/record.url?scp=27544434080&partnerID=8YFLogxK

U2 - 10.1029/2005GL023183

DO - 10.1029/2005GL023183

M3 - Article

SN - 0094-8276

VL - 32

SP - L17609

JO - Geophysical Research Letters

JF - Geophysical Research Letters

ER -

Reconstruction of deglacial sea surface temperatures in the tropical Pacific from selective analysis of a fossil coral

Abstract

Keywords

UN SDGs

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