Developing an Absolutely-Dated Holocene Tree-Ring Chronologyfrom Sub-Fossil Huon Pine in Tasmania for Paleoclimate and Isotopic Studies

这是一个为期2年的项目，旨在从位于澳大利亚塔斯马尼亚州西部的活的和亚化石的huon松树中开发一个连续的、绝对有年代的全新世树木年轮年表。根据已知的活树样本年龄（1000岁），以及从塔斯马尼亚西部斯坦利河回收的亚化石木材中获得的一系列重叠的放射性碳年代，树木年轮样本正在开发一个近3000年的年表。此外，从斯坦利河沉积物中回收的其他亚化石原木的放射性碳年代可以追溯到目前北半球树木的放射性碳校准曲线之外。因此，塔斯马尼亚的9-1万年树木年轮年表有可能包括气候上有趣的低温温暖期（约7- 9000 BP），现实的前景是它最终延伸到新仙女木时期的寒冷事件（约10- 11000 BP）和冰期-间冰期过渡（约13- 14000 BP）。我们将尽可能最大限度地利用斯坦利河亚化石木材，从该地区采集更多的原木样本，并在塔斯马尼亚州寻找其他huonpine遗址，努力定位9000年前的木材，以延长放射性碳校准曲线。在此过程中，我们还将为塔斯马尼亚和新西兰开发一个1000年的现代树木年轮年表网络，如果可能的话，将用于重建该地区过去的气候。该项目生产的精确测定年代的木材将用于其他科学研究，包括稳定同位素和碳-14分析，以使该项目尽可能具有科学成果。

This is a 2 year project aimed towards developing a continuous, absolutely dated Holocene tree-ring chronology from live and sub-fossil huon pine located in western Tasmania, Australia. Based on the known ages of sampled living trees (1000 years old) and a series of overlapping radiocarbon dates from recovered sub-fossil logs, all from the Stanley River in western Tasmania, tree-ring specimens are in hand for developing a chronology almost 3000 years in length. In addition, other sub- fossil logs recovered from deposits at the Stanley River have radiocarbon dates that extend back beyond the present radiocarbon calibration curve derived from Northern Hemisphere trees. Consequently, there is the proven potential for a 9-10,000 year tree-ring chronology from Tasmania that would include the climatically interesting Hypsithermal warm period (ca. 7-9,000 BP), with the realistic prospect of it eventually extending back to the Younger Dryas cold event (ca. 10-11,000 BP) and the glacial- interglacial transition (ca. 13-14,000 BP). We will exploit to the fullest extent possible the Stanley River sub-fossil wood now in hand, sample additional logs from that locality, and explore Tasmania for other huon pine sites in an effort to locate pre-9,000 BP wood for extending the radiocarbon calibration curve. In the process, we will also develop a network of 1000 year long modern tree-ring chronologies for Tasmania and, if possible, New Zealand that will be used to reconstruct past climate in that sector. The precisely dated wood produced by this project will be available for other scientific studies, including stable isotope and carbon-14 analyses, in order to make this project as scientifically productive as possible.