globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2014.05.047
论文题名:
Paired Porites coral Sr/Ca and δ18O from the western South China Sea: Proxy calibration of sea surface temperature and precipitation
作者: Bolton A.; Goodkin N.F.; Hughen K.; Ostermann D.R.; Vo S.T.; Phan H.K.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2014
卷: 410
起始页码: 233
结束页码: 243
语种: 英语
英文关键词: Monsoon ; Porites ; Precipitation ; South China Sea ; Stable oxygen isotopes ; Strontium/calcium
英文摘要: Paired strontium-to-calcium (Sr/Ca) and δ18O measurements for two Porites lutea corals recovered from Hon Tre Island, Vietnam, are strongly correlated to sea surface temperature (SST) and precipitation at monthly to interannual time-scales. Least squares linear regression of monthly Sr/Ca to SST shows a strong, significant correlation (r2=0.77, p<.0001), with root mean square residuals of 0.9°C. 3-year averaged (binned) Sr/Ca for wet (Sep-Nov) and dry (Jan-Mar) seasons separately captures SST variability at interannual time scales (Sr/Ca RMSR=0.42°C and 0.70°C for wet and dry seasons, respectively). Coral δ18O correlates weakly to SST at seasonal and interannual time scales for wet and dry seasons, with significant anomalies (δ18O RMSR=2.4°C and 1.65°C, respectively). Correcting the SST influence on coral δ18O using paired Sr/Ca values provides estimates of δ18O of seawater (δ18Osw). 3-year averaged δ18Osw during the wet season shows a significant correlation to local precipitation (r2=0.54, p=0.01). These results show that coral Sr/Ca in this location accurately reflects SST at a number of timescales, and that seawater δ18O composition in the wet season is controlled by local precipitation, largely unmodified by ocean circulation during the winter monsoon. This study highlights the sensitivity and utility of coral geochemistry in this region for reliably reconstructing SST and monsoonal precipitation. © 2014 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69261
Appears in Collections:过去全球变化的重建

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作者单位: Earth Observatory of Singapore, Division of Earth Sciences, 50 Nanyang Avenue, Singapore; Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA, United States; Department of Geological Sciences, Jackson School of Geosciences, University of Texas - Austin, Austin, TX, United States; Institute of Oceanography, Vietnam Academy of Science and Technology, 1 Cau Da Street, Nha Trang City, Viet Nam

Recommended Citation:
Bolton A.,Goodkin N.F.,Hughen K.,et al. Paired Porites coral Sr/Ca and δ18O from the western South China Sea: Proxy calibration of sea surface temperature and precipitation[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2014-01-01,410
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