globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2014.07.039
论文题名:
Investigation of sea surface temperature changes from replicated coral Sr/Ca variations in the eastern equatorial Pacific (Clipperton Atoll) since 1874
作者: Wu H.C.; Moreau M.; Linsley B.K.; Schrag D.P.; Corre`ge T.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2014
卷: 412
起始页码: 208
结束页码: 222
语种: 英语
英文关键词: El Nin&tild ; o/Southern Oscillation ; Porites lobata ; Sea surface salinity ; Sea surface temperature
英文摘要: Sub-seasonally resolved and replicated coral Sr/Ca time series at Clipperton Atoll (10°18'N, 109°13'W) in the eastern Pacific are assessed as a sea surface temperature (SST) proxy in this region with small seasonal SST variability. The composite coral Sr/Ca time series is a partially replicated record of three live and one sub-modern colony of Porites lobata extending back to 1874. Large inter-colony coral Sr/Ca offsets equate to relative SST differences of 0.6 to 4.3. °C and limit the ability to reconstruct absolute SST changes. Moreover, the replication method revealed a 12-year section of growth in one colony where mean Sr/Ca was anomalously low (~. 1. °C higher SST) relative to the other colonies without evidence of diagenesis or other significant skeletal alterations. The presence of this anomalous interval supports the need for multi-coral Sr/Ca replication in specific sites or regions. The Clipperton Composite Sr/Ca anomaly record is significantly coherent (r. =. 0.71-0.76, p. <. 0.001) with gridded instrumental SSTs but with larger amplitude decadal variance that appears to more accurately represent actual SST variability at Clipperton. The amplitude of the secular warming trend during the last century at Clipperton is 0.3 to 0.6. °C larger (~. twice as large) than the trend in the poorly "ground-truthed" instrumental SST records for the region. The interannual and decadal variability in Clipperton coral Sr/Ca demonstrates strong coherence to the Pacific Decadal Oscillation and the El Nin&tild;o/Southern Oscillation (ENSO) with reduced ENSO variability from 1920 to late 1930s and enhanced variability in the late twentieth century. © 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/69223
Appears in Collections:过去全球变化的重建

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作者单位: MARUM-Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany; UMR 5805 EPOC, University of Bordeaux, Talence, France; Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, United States; Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA, United States

Recommended Citation:
Wu H.C.,Moreau M.,Linsley B.K.,et al. Investigation of sea surface temperature changes from replicated coral Sr/Ca variations in the eastern equatorial Pacific (Clipperton Atoll) since 1874[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2014-01-01,412
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