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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >The coupling of Orbulina universa diameter with the warming and cooling events in the Arabian Sea over the past 40,000 years
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The coupling of Orbulina universa diameter with the warming and cooling events in the Arabian Sea over the past 40,000 years

机译：在过去的40,000年里，奥尔巴纳大学直径与阿拉伯海的热化和冷却事件的耦合

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摘要

A 40 ky record of variations in the average diameter of Orbulina universa from a 5.4 m core (SK-322) in the Arabian Sea, off Goa, India has been analysed in this study. The chronology of the upper 1.00 m of the core was documented by AMS radiocarbon dates. Fifty specimens of O. universa were hand-picked from each of the 50 subsamples. In all, 2500 specimens were measured for their diameter. Downcore variations in the average diameter of O. universa were in excellent agreement with the curve representing the Iberian Margin temperature index, with the peak representing the Bolling-Allerod transition and the troughs reflecting Heinrich Event I and Younger Dryas. The lower part of the core examined in this study (between 58 and 100 cm), which is the equivalent of 30,000-40,000 years BP, is marked by closely spaced peaks and troughs that are interpreted as representing the Dansgaard-Oeschger cycles that were dominant in the Northern Hemisphere between 60,000 and 30,000 years BP.
机译：这项研究分析了印度果阿附近阿拉伯海5.4米岩芯（SK-322）中的一个40Ky的宇宙球藻平均直径变化记录。AMS放射性碳年代记录了岩芯上部1.00 m的年代。从50个亚样本中，每一个都手工挑选了50个世界杯的标本。总共测量了2500个样本的直径。universa O.平均直径的向下变化与代表伊比利亚边缘温度指数的曲线非常一致，峰值代表Bolling Allerod转变，而波谷则反映了海因里希事件I和更年轻的仙女木。本研究中检查的岩芯下部（58至100厘米）相当于30000至40000年BP，其特征是密集的波峰和波谷，被解释为代表了在北半球60000至30000年BP之间占主导地位的Dansgaard-Oeschger旋回。

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