대한해협에 분포하는 석산호 골격의 Sr/Ca를 이용한 고해양의 고해상도 복원

DC Field Value Language
dc.contributor.author 서인아 -
dc.contributor.author Shimamura, Michiyo -
dc.contributor.author 형기성 -
dc.contributor.author 이용일 -
dc.contributor.author 유찬민 -
dc.date.accessioned 2020-07-16T19:31:08Z -
dc.date.available 2020-07-16T19:31:08Z -
dc.date.created 2020-02-11 -
dc.date.issued 2010-10-01 -
dc.identifier.uri https://sciwatch.kiost.ac.kr/handle/2020.kiost/28760 -
dc.description.abstract Geochemical composition of massive coral skeletons has been used as a common proxy for seasonal to decadal scale climate variations in tropical/subtropical regions. Sr/Ca ratio of coral skeletons is especially useful for reconstruction of past sea surface temperature (SST) since it varies depending only on SST. Favia sp. (Family Faviidae), a hermatypic massive coral, is distributed from tropical to higher latitude regions, even in the Korea Strait, located at 34N, despite the area's low SST. Thus, Favia can serve as a high-resolution paleoenvironmental archive in the East Asia marginal seas including the Korea Strait.For paleo-SST reconstruction of the Korea Strait region, a 90 cm-long core of living Favia speciosa and a 5.5 m-long drill core of coral mound were collected from Iki Island, Japan in 2007. The top 28 cm interval of modern Favia core and 5 cm long fossil Favia (2820 yr BP) were selected for the measurement of Sr/Ca and then SST reconstruction. The analytical works are still in progress. So far, the determined Sr/Ca of the modern coral revealed 21 annual cycles attributed by seasonal environmental changes from 1987 to 2007. Such a clear seasonality seems likely to reflect SST variations. The temperature dependence of Sr/Ca was estimated -0.0388 mmol/mol/C, which may demonstrate the possibility of stopping of coral skeleton growth in winter. Sr/Ca of 2800 year-old fossil Favia also showed seasonal variations, indicative of their potential for a paleo-SST proxy. SST seemed lower in 2820 yr BP judging from its higher summer maxima than the modern one. The similarity of winter maxima between Sr/Ca of the fossil and modern corals indicates the lower limit of temperature that corals can calcify. With completion of Sr/Ca measurement for modern Favia coral, it is possible to reveal SST variations of the study region for the past 41 years. This study is expected to enable to evaluate global warming in this region quantitatively. -
dc.description.uri 1 -
dc.language English -
dc.publisher International Association of Sedimentologists -
dc.relation.isPartOf International Sedimentological Congress -
dc.title 대한해협에 분포하는 석산호 골격의 Sr/Ca를 이용한 고해양의 고해상도 복원 -
dc.title.alternative High-resolution paleoceanographic reconstruction in the Korea Strait region using Sr/Ca of scleractinian coral -
dc.type Conference -
dc.citation.endPage 797 -
dc.citation.startPage 797 -
dc.citation.title International Sedimentological Congress -
dc.identifier.bibliographicCitation International Sedimentological Congress, pp.797 -
dc.description.journalClass 1 -
Appears in Collections:
Marine Resources Research Division > Global Ocean Research Center > 2. Conference Papers
Marine Resources Research Division > Deep-sea Mineral Resources Research Center > 2. Conference Papers
Files in This Item:
There are no files associated with this item.

qrcode

Items in ScienceWatch@KIOST are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse