A skeletal Sr/Ca record preserved in Dipsastraea (Favia) speciosa and implications for coral Sr/Ca thermometry in mid-latitude regions SCIE SCOPUS

Cited 8 time in WEB OF SCIENCE Cited 7 time in Scopus
Title
A skeletal Sr/Ca record preserved in Dipsastraea (Favia) speciosa and implications for coral Sr/Ca thermometry in mid-latitude regions
Author(s)
Seo, Inah; Lee, Yong Il; Watanabe, Tsuyoshi; Yamano, Hiroya; Shimamura, Michiyo; Yoo, Chan Min; Hyeong, Kiseong
KIOST Author(s)
Yoo, Chan Min(유찬민)Hyeong, Kiseong(형기성)
Publication Year
2013-08
Abstract
A core (900 mm long) of the scleractinian coral Dipsastraea (Favia) speciosa was collected from Iki Island (approximate to 33 degrees 48N), Japan, one of the highest latitude coral reefs known to exist at present, where winter monthly mean sea surface temperature (SST) drops to 13 degrees C. The Sr/Ca profile was constructed using a bulk sampling method for the uppermost 280 mm interval of the core, which grew between 1966 and 2007, to test whether it could act as a suitable proxy for SST in a harsh environmental setting where reef-building coral do not usually survive. The Sr/Ca-SST relationship derived from the annual Sr/Ca and SST extremes predicted the observed monthly averaged summer SST extremes within an error range of 1.1 degrees C (1 s.d., n=40). The obtained Sr/Ca-SST calibration was also found to be valid for subtropical Dipsastraea (Favia) corals, proving its broad applicability. However, low-amplitude winter peaks were observed in the slow-growing intervals, which we confirmed (using individual spot analysis along a continuous growth line) result from the mixing of theca grown at different times. Our bulk sampling approach, across multiple growth lines in the skeleton of D. (F.) speciosa, led to the mixing of asynchronous skeletal part. At the study site, D. (F.) speciosa grows continuously, even during the cold season, suggesting that the skeletal Sr/Ca obtained from specimens of D. (F.) speciosa can be used as an SST proxy in the northwest Pacific marginal seas.
ISSN
1525-2027
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/3144
DOI
10.1002/ggge.20195
Bibliographic Citation
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS, v.14, no.8, pp.2873 - 2885, 2013
Publisher
AMER GEOPHYSICAL UNION
Subject
SEA-SURFACE TEMPERATURE; TRACE-ELEMENT SYSTEMATICS; ISOTOPE SYSTEMATICS; THERMAL TOLERANCE; WATER TEMPERATURE; PORITES CORAL; EL-NINO; REEF; GROWTH; DELTA-O-18
Keywords
mid-latitude coral; Dipsastraea (Favia) speciosa; sea surface temperature; paleoclimate proxy; Sr/Ca thermometry
Type
Article
Language
English
Document Type
Article
Publisher
AMER GEOPHYSICAL UNION
Related Researcher
Research Interests

Ocean Geology,Mineral resources,해양지질,광물자원

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