A multiproxy reconstruction of Hebridean (NW Scotland) spring sea surface temperatures between AD 1805 and 2010
A multiproxy reconstruction of Hebridean (NW Scotland) spring sea surface temperatures between AD 1805 and 2010
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DOI：
10.1016/j.palaeo.2013.05.029
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发表时间：
2013-09
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影响因子：
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通讯作者：
D. Reynolds;P. Butler;Siobhan Williams;J. Scourse;C. Richardson;A. Wanamaker;W. Austin;A. Cage;M. Sayer
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作者：
D. Reynolds;P. Butler;Siobhan Williams;J. Scourse;C. Richardson;A. Wanamaker;W. Austin;A. Cage;M. Sayer
目前缺乏海洋环境的年度解析温度序列。我们对公元 1805 年至 2010 年期间赫布里底陆架海（泰里海峡；苏格兰西北部）春季海面温度 (SST) 进行了多代理重建。该重建基于第一个绝对定年多年解析的Glycymeris glycymeris双壳类软体动物硬化年代学的生长增量系列，以及之前发布的从苏纳特湖附近的定年沉积物岩心采样的底栖有孔虫的稳定氧同位素数据（δ18O）。独立序列包含与跨互补频域的海表温度的显着相关性。沉积档案的低频分量与G的中频和高频分量相结合。用于创建单个多代理系列的甘油糖年代学指数。分割校准验证统计数据（误差减少、RE、效率系数、CE 和 R2）表明，根据当地仪器海面温度校准的多代理记录在重建春季海表温度方面具有显着的精度和技巧（RE = 0.59，CE = 0.26，R2 = 0.54）。这些数据表明，双壳类硬化年代学与沉积物档案等低频代理相结合，可以促进全新世晚期古海洋变异性的统计稳健重建，用于以前没有年度解析档案的温带海洋系统中具有水文学意义的区域。重建的海表温度包含每世纪 0.60 ± 0.14 °C 的总体变暖趋势。在重建时期（1999年、2000年、2002年和2003年）中，只有四年的气温比重建的平均海温（9.03°C）高出两个标准差以上，而在19世纪上半叶（1835年、1838年和1840年）中，只有三年的温度比重建的平均温度（6.80°C）下降了2σ以上。
There is currently a deficiency of annually-resolved temperature series from the marine environment. We present a multiproxy reconstruction of Hebridean shelf sea (Tiree Passage; NW Scotland) spring sea surface temperatures (SSTs) for the period AD 1805–2010. The reconstruction is based on the growth increment series from the first absolutely dated annually-resolved multi-centennialGlycymeris glycymerisbivalve mollusc sclerochronology coupled with previously published stable oxygen isotope data (δ18O) from benthic foraminifera sampled from a dated sediment core from nearby Loch Sunart. The independent series contain significant correlations with SSTs across complementary frequency domains. The low frequency component of the sedimentary archive was combined with the mid and high frequency components of theG. glycymerischronology indices to create a single multiproxy series. Split calibration-verification statistics (reduction of error, RE, coefficient of efficiency, CE, and R2) indicate that the multiproxy record, calibrated to local instrumental sea surface temperatures, contains significant precision and skill at reconstructing spring SSTs (RE = 0.59, CE = 0.26, R2= 0.54). These data demonstrate that bivalve sclerochronologies, when combined with low frequency proxies such as sediment archives, can facilitate statistically robust reconstructions of palaeoceanographic variability during the late Holocene for hydrographically-significant regions of the temperate marine system previously void of annually-resolved archives. The reconstructed SSTs contain a general warming trend of 0.60 ± 0.14 °C per century. Only four years in the reconstructed period (1999, 2000, 2002 and 2003) exceed temperatures greater than two standard deviations higher than the reconstructed mean SST (9.03 °C), whilst just three years in the first half of the 19th century (1835, 1838 and 1840) fall more than 2σ below the reconstructed mean (6.80 °C).