Coralline algae are global palaeothermometers with bi-weekly resolution
作者： N.A. Kamenos , M. Cusack , P.G. Moore
DOI: 10.1016/J.GCA.2007.11.019
关键词:
摘要: Abstract High resolution palaeoclimate data are required for the Holocene to resolve differences recorded by current proxies. The pole distribution of rhodoliths (coralline algae) with their annual and sub-annual calcite bands make these attractive candidates such a role. These contain climate information in form elemental traces. In situ temperature (IST) was at two rhodolith beds 1.5 years. concentrations MgCO 3 SrCO (mol %) deposited Lithothamion glaciale Phymatolithon calcareum over this 18- month period were determined using electron ion microprobes. Highly significant linear relationships exist between Mg, Sr IST as well sea surface temperature. Calibration Mg concentration used obtain 2-year profile from subfossil thallus indicating half seasonal peak-to-peak amplitude earlier during than present day. Both slow-growing species ( −1 ) allowed sampling resolutions 23 year which is equivalent 1 reading every 2 weeks. Sub-monthly records them unique globally distributed palaeothermometers may help refine regional histories Holocene.
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