从20世纪90年代开始,由贝尔法斯特女王大学CHRONO气候,环境和年表中心的Paula J. Reimer领导的研究人员联盟开始构建一个广泛的数据集和校准工具,他们首先称之为CALIB。从那时起,CALIB(现已更名为IntCal)已经多次改进 – 截至本文撰写时(2017年1月),该程序现在称为IntCal13。 IntCal结合并加强了来自树木年轮,冰芯,火山灰,珊瑚和洞穴的数据,为12,000到5万年前的c14日期提供了显着改进的校准集。最新的曲线于2012年7月在第21届国际放射性碳排放大会上获得批准。在过去几年中,进一步提炼放射性碳曲线的新潜在来源是日本的水月湖。 Suigetsu湖每年形成的沉积物保存着过去5万年来环境变化的详细信息,放射性碳专家PJ Reimer认为这些信息与格陵兰冰盖的样品核心一样好,也许更好。研究人员Bronk-Ramsay等。报告808 AMS日期基于三个不同放射性碳实验室测量的沉积物变化。日期和相应的环境变化有望在其他关键气候记录之间建立直接关联,使得Reimer等研究人员能够将放射性碳日期精确地校准到12,500到实际限制的c14约会52,800之间。 Reimer及其同事指出,IntCal13只是最新的校准装置,预计会有进一步的改进。例如,在IntCal09的校准中,他们发现了在新仙女木(12,550-12,900 cal BP)期间,北大西洋深水形成的关闭或至少急剧减少的证据,这肯定是气候变化的反映;他们不得不从北大西洋扔出那段时间的数据并使用不同的数据集。我们应该在不久的将来看到一些有趣的结果。

英国贝尔法斯特女王大学Essay代写:CHRONO气候

Beginning in the 1990s, a consortium of researchers led by Paula J. Reimer of the CHRONO Center for Climate, Environment and Watchmaking at Queen’s University in Belfast began to build an extensive data set and calibration tool, first called CALIB. Since then, CALIB (now renamed IntCal) has been improved several times – as of this writing (January 2017), the program is now called IntCal13. IntCal combines and enhances data from tree rings, ice cores, volcanic ash, corals and caves, providing a significantly improved calibration set for the c14 date from 12,000 to 50,000 years ago. The latest curve was approved at the 21st International Radiocarbon Emission Conference in July 2012. In the past few years, a new potential source for further refining the radiocarbon curve is Japan’s Shuiyue Lake. Seigetsu Lake’s annual sediments preserve detailed information on environmental changes over the past 50,000 years, and radiocarbon expert PJ Reimer believes this information is as good as the sample core of the Greenland ice sheet, perhaps better. Researcher Bronk-Ramsay et al. Report 808 AMS date is based on sediment changes measured by three different radiocarbon laboratories. Dates and corresponding environmental changes are expected to establish a direct correlation between other key climate records, enabling researchers such as Reimer to accurately calibrate radiocarbon dates to between 12,500 and actual limit c14 appointments of 52,800. Reimer and colleagues point out that IntCal13 is only the latest calibration device and is expected to be further improved. For example, in the calibration of IntCal09, they found evidence of a closure or at least a sharp decrease in deepwater formation in the North Atlantic during the New Dryas (12,550-12,900 cal BP), which is certainly a reflection of climate change; they have to go north The Atlantic throws data for that time and uses a different data set. We should see some interesting results in the near future.

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