Accurate time scales for climate archives from European tree-ring chronologies in the Late Glacial - Extension and consolidation of Swiss and German pine chronologies back to 14000 BP

冰期末期欧洲树木年轮年表中气候档案的准确时间尺度 - 瑞士和德国松树年表的延伸和整合可追溯到距今 14000 年

• 批准号: 264059065
• 负责人: Dr. Gerhard Helle
• 金额: --
• 依托单位: Eidgenössische Technische Hochschule Zürich (ETH)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2015
• 资助国家: 德国
• 起止时间: 2014-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/264059065?language=en
• 关键词: Accurate; time; scales; climate; archives

Annually resolved and absolutely dated tree-ring chronologies are important paleo-environmental proxy archives, because robust master chronologies are available for many different regions around the globe. The unique dating accuracy has a strong impact on many fields of application, such as paleoclimatology and paleoecology, but also archeology and radiocarbon dating. Here, we strive to consolidate and extend the worldwide longest continuous tree-ring width chronology from Hohenheim/Zurich, which currently reaches back to 12 500 before present (BP). An exceptional discovery of 256 individual pine trees within the town of Zurich in 2013 (herein referred to the Binz material), for which first radiocarbon dates now suggest a time window between 14 000 and 11 000 BP, implies strong hope to fill the existing gaps in the Late Glacial tree-ring chronology around 12 500 BP. If successful, the worldwide longest, absolutely dated and continuous tree-ring record would be extended by almost two millennia until around 14 000 BP, thus covering a particularly interesting climatological transition from the Last Ice Age into the Early Holocene - a period for which proxy evidence is generally scarce. Achieving this task, however, requires joint forces across an international Swiss-German collaboration, which will in addition to the dendrochronological ring width and density measurements also generate corresponding high-resolution radiocarbon (14C) dates as well as stable isotope (13C and 18O) records. The proposed multi-parameter approach will not only support and strengthen the chronology development process typically based on ring width measurements alone, but particularly also our palaeoenvironmental understanding of the Late Glacial period surrounding the Younger Dryas, a period during which rapid climatic shifts likely provide a natural analogue to the most recent anthropogenic change.The new multi-parameter tree-ring archive will allow extending the tree-ring-based terrestrial radiocarbon calibration curve for more than 2 000 years into late glacial times improving considerably radiocarbon dating accuracy for archaeologists and geosciences. In combination with several available marine radiocarbon records and complementary radioisotopic records from polar ice cores (10Be, 36Cl), an precise and highly resolved calibration curve will also provide information about changes of solar activity, as well as evidence for trends and extremes at the putative transition of generally colder to warmer climatic conditions, associated with rapid changes in the hydrological cycle. In addition, decadal to centennial 14C variations in tree-rings will be compared to the mirror image of 10Be in polar ice cores, thus anchoring the ice core time scale to the tree-ring scale. Consideration of the high-resolution stable isotopes (13C and 18O) from the same trees will further help us to capture the full range of late glacial temperature and precipitation variability.

每年解决且绝对过时的树环时间顺序是重要的古环境代理档案，因为全球许多不同地区都可以使用强大的主时间表。独特的约会准确性对许多应用领域有很大的影响，例如古气候和古生态学，以及考古学和放射性碳年代。在这里，我们努力从Hohenheim/Zurich巩固和扩展全球最长的连续树环宽度年表，目前，它在现在之前恢复到12 500（BP）。 2013年在苏黎世镇内发现了256棵单独的松树（此处提到Binz材料），现在第一个放射性碳日期表明，一个时间窗口在14 000至11 000 bp之间，这意味着强烈的希望可以填补晚期冰川树圆环的现有空白，左右的时间窗口大约在12 500 bp左右。如果成功，全球最长的，绝对过时的树环记录将延长近2千年，直到约14 000 bp，从而涵盖了从上一个冰河时代到早期全新世的特别有趣的气候过渡 - 代理证据通常很少。然而，完成这项任务需要在国际瑞士 - 德国人的合作中进行联合力量，此外还将产生相应的高分辨率放射性碳（14C）日期以及稳定的同位素（13C和18O）记录。拟议的多参数方法不仅将不仅基于环宽度测量值支持和增强年代学的发展过程，而且特别是我们对围绕年轻Dryas的冰川时期晚期的古环境的理解，尤其是我们的古环境理解，在此期间，快速的气候变化很可能为最新的人类型式隔离式隔离式拱形式的隔离式拱形，这可能会提供一个自然的类似物。在冰川时期，校准曲线超过2 000年，改善了考古学家和地球科学的放射性碳年期精度。结合几种可用的海洋放射性碳记录和来自Polar Ice核心（10BE，36CL）的互补的放射性病记录，精确且高度分辨的校准曲线还将提供有关太阳能活动变化的信息，以及证据，证据，证据表明趋势和极端是在普遍寒冷的温暖气候条件下，与水分学的快速变化相关。另外，将树木环的十六年份14c变化与极地冰芯中的10BE镜像进行比较，从而将冰核时间尺度固定在树环尺度上。考虑同一树木的高分辨率稳定同位素（13C和18O）的考虑将进一步帮助我们捕获晚期冰川温度和降水变异性的全部范围。

项目成果

New tree-ring evidence for the Late Glacial period from the northern pre-Alps in eastern Switzerland

• DOI: 10.1016/j.quascirev.2018.02.019
• 发表时间: 2018-04
• 期刊: Quaternary Science Reviews
• 影响因子: 4
• 作者: F. Reinig;D. Nievergelt;J. Esper;Michael Friedrich;G. Helle;L. Hellmann;B. Kromer;Sandro Morganti;M. Pauly;A. Sookdeo;Willy Tegel;K. Treydte;A. Verstege;L. Wacker;U. Büntgen

A guideline for sample preparation in modern tree-ring stable isotope research

• DOI: 10.1016/j.dendro.2017.05.002
• 发表时间: 2017-06-01
• 期刊: DENDROCHRONOLOGIA
• 影响因子: 3
• 作者: Schollaen, Karina;Baschek, Heiko;Helle, Gerhard
• 通讯作者: Helle, Gerhard

A high yield cellulose extraction system for small whole wood samples and dual measurement of carbon and oxygen stable isotopes

• DOI: 10.1016/j.chemgeo.2018.09.007
• 发表时间: 2019-01-20
• 期刊: CHEMICAL GEOLOGY
• 影响因子: 3.9
• 作者: Andreu-Hayles, Laia;Levesque, Mathieu;Helle, Gerhard
• 通讯作者: Helle, Gerhard

DECADALLY RESOLVED LATEGLACIAL RADIOCARBON EVIDENCE FROM NEW ZEALAND KAURI

• DOI: 10.1017/rdc.2016.86
• 发表时间: 2016-12-01
• 期刊: RADIOCARBON
• 影响因子: 8.3
• 作者: Hogg, Alan;Southon, John;Wacker, Lukas
• 通讯作者: Wacker, Lukas