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Assessing the reproducibility of coral oxygen and carbon isotope time series from Fiji and Tonga and their application to the reconstruction of South Pacific Convergence Zone movements since the mid-1800s.

机译：评估斐济和汤加的珊瑚氧和碳同位素时间序列的可重复性，并将其应用于自1800年代中期以来南太平洋收敛带运动的重建。

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A major feature affecting the hydrology of the southern hemisphere is the South Pacific Convergence Zone (SPCZ); a band of high rainfall extending southeastward from the Western Pacific Warm Pool (WPWP). It is a key source of atmospheric water vapor and latent heating. While it is clear that the SPCZ plays a fundamental role in Earth's climate, little is known about the patterns and mechanisms responsible for interannual to century-scale changes in its position and how it may respond to global climate change.;This research was focused on developing precisely dated, coral-derived geochemical records of SPCZ variability over the last 200 years. A unique regional coral network consisting of five coral time-series from Fiji (cores 1F, AB, FVB1, FVB2 and 16F) and three from Tonga (cores TH1, TNI2 and TF1) was used to investigate the reproducibility of coral delta18O and delta13C records to create Fiji and Tonga coral delta 18O and delta13C composite records for paleoclimatic reconstruction. Using at least three coral delta18O records from the same area is sufficient to obtain a statistically reliable signal for climate reconstruction. Fiji and Tonga coral delta18O composites at annual resolution are a suitable proxy for past sea surface salinity (SSS) variability. The Fiji coral core delta13C composite can be used to reconstruct the oceanic delta13C variability of the dissolved inorganic carbon (DIC) reservoir. The long-term decreasing trend in delta13C Fiji-DIC could be considered a representation of the well-known Suess effect. This study discusses interannual, decadal/interdecadal and long-term trends in the SPCZ salinity front movements, which appear to reflect mostly changes in water mass advection, rather than changes in precipitation linked with SPCZ displacement. Fiji and Tonga long term freshening trends suggest that the SPCZ is intensifying and/or expanding. The difference in salinity between Fiji and Tonga indicates that Fiji is freshening at a more rapid rate than Tonga. This study concludes that an intensification of the eastward flowing Subtropical Counter Current during the 20th century appears to be bringing relatively colder and saltier waters to Tonga; those conditions counterbalance the effects of the warmer and fresher conditions induced by the SPCZ expansion.

机译：影响南半球水文学的一个主要特征是南太平洋收敛带（SPCZ）；从西太平洋暖池（WPWP）向东南延伸的高降雨带。它是大气中水蒸气和潜热的关键来源。虽然很明显，SPCZ在地球气候中起着根本性的作用，但对其位置的年际至世纪尺度变化及其对全球气候变化的响应方式和机制知之甚少。在过去200年中，开发了精确的，由珊瑚衍生的SPCZ变化的地球化学记录。一个独特的区域珊瑚网由斐济的五个珊瑚时间序列（核心1F，AB，FVB1，FVB2和16F）和汤加的三个珊瑚时间序列（TH1，TNI2和TF1核心）组成，用于研究珊瑚delta18O和delta13C记录的可重复性。创建斐济和汤加珊瑚三角洲18O和delta13C复合记录，用于古气候重建。使用来自同一地区的至少三个珊瑚delta18O记录足以获取统计可靠的信号，用于气候重建。年度分辨率的斐济和汤加珊瑚delta18O复合材料是过去海表盐度（SSS）变异性的合适替代。斐济珊瑚核心delta13C复合材料可用于重构溶解的无机碳（DIC）储层的海洋delta13C变异性。可以认为delta13C Fiji-DIC的长期下降趋势是众所周知的Suess效应的代表。这项研究讨论了SPCZ盐度前沿运动的年际，年代际/年代际和长期趋势，这些趋势似乎主要反映了水质对流的变化，而不是与SPCZ位移相关的降水变化。斐济和汤加的长期清新趋势表明，SPCZ正在加强和/或扩展。斐济和汤加之间盐度的差异表明，斐济比汤加更新鲜。这项研究得出的结论是，在20世纪，向东流动的亚热带逆流的加剧似乎给汤加带来了相对较冷和咸的水域。这些条件抵消了由SPCZ扩张引起的较温暖和较新鲜条件的影响。

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作者
Dassie, Emilie Pauline.;
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State University of New York at Albany.;

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授予单位 State University of New York at Albany.;
学科 Climate Change.;Geochemistry.;Paleoclimate Science.
学位 Ph.D.
年度 2012
页码 222 p.
总页数 222
原文格式 PDF
正文语种 eng
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1. A Fiji multi-coral delta O-18 composite approach to obtaining a more accurate reconstruction of the last two-centuries of the ocean-climate variability in the South Pacific Convergence Zone region [J] . Dassie Emilie P., Linsley Braddock K., Correge Thierry, Paleoceanography . 2014,第12期

机译：斐济多珊瑚三角洲O-18合成方法，可更准确地重建南太平洋收敛带地区最近两个世纪的海洋气候变化
2. Stable nitrogen and carbon isotope (δ~(15)N and δ~(13)C) variability in shallow tropical Pacific soft coral and black coral taxa and implications for paleoceanographic reconstructions [J] . Williams B., Grottoli A.G. Geochimica et Cosmochimica Acta: Journal of the Geochemical Society and the Meteoritical Society . 2010,第18期

机译：热带浅海太平洋软珊瑚和黑珊瑚生物群中稳定的氮碳同位素（δ〜（15）N和δ〜（13）C）的变化及其对古海洋学重建的影响
3. Interdecadal-decadal climate variability from multicoral oxygen isotope records in the South Pacific Convergence Zone region since 1650 A.D. [J] . Linsley BK, Zhang PP, Kaplan A, Paleoceanography . 2008,第2期

机译：自公元1650年以来南太平洋收敛带地区多珊瑚氧同位素记录的年代际年代际变化。
4. Strontium/calcium, oxygen isotope, and uranium/calcium measurements in corals: Applications to late Quaternary sea surface temperatures in the West Pacific warm pool. [D] . Min, (Angela) Guangrong. 2001

机译：珊瑚中锶/钙，氧同位素和铀/钙的测量：西太平洋暖池中第四纪晚期海面温度的应用。
5. 2005: Coral oxygen isotope records of interdecadal climate variations in the South Pacific convergence zone region [O] . Stefan Bagnato, Braddock K. Linsley, Stephen S. Howe, 2015

机译：2005年：南太平洋汇聚带地区年代际气候变化的珊瑚氧同位素记录

Assessing the reproducibility of coral oxygen and carbon isotope time series from Fiji and Tonga and their application to the reconstruction of South Pacific Convergence Zone movements since the mid-1800s.

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