Developing and Absolutely-Dated Holocene Tree-Ring Chronology from Subfossil Huon Pine in Tasmania for Paleoclimatic and Isotopic Studies

题目：为古气候和同位素研究开发塔斯马尼亚休恩松亚化石的全新世绝对年代树轮年表该奖项支持地球系统历史计划（USGCRP）的研究，以开发塔斯马尼亚休恩松木材的全新世长度，绝对年代的年轮年表。该年代学将用于提供树木年代学定年的木材，用于开发南半球独立的放射性碳校准。这将用于与北半球木材单独开发的校准曲线进行比较和扩展。该木材还将用于表征整个全新世大气放射性碳的半球间偏移。通过这样做，可以确定不寻常的温盐环流和海洋通风的时期。该项目还将为稳定同位素研究提供年代木材，并为树木气候研究开发数千年年轮年表。因此，这些数据将提供南半球这一地区全新世大部分时间气候变化的高分辨率、精确年代估计。这将是世界上最长的树木年轮年表，并将提供有关晚冰期的高分辨率气候和放射性碳变化的丰富信息。

Abstract ATM-9627318 Cook, Edward D'Arrigo, Rosanne Columbia University Title: Developing an Absolutely-Dated Holocene Tree-Ring Chronology from Subfossil Huon Pine in Tasmania for Paleoclimatic and Isotopic Studies This award supports research within the Earth System History Program (USGCRP) to develop a Holocene-length, absolutely-dated annual tree-ring chronology from Huon pine wood in Tasmania. This chronology will be used to provide dendrochronologically-dated wood for developing an independent radiocarbon calibration for the Southern Hemisphere. This will be used to compare for comparing with and extend the calibration curve developed from Northern Hemisphere wood alone. The wood will also be used to characterize the inter-hemispheric offset in atmospheric radiocarbon throughout the Holocene. In so doing, periods of unusual thermohaline circulation and ocean ventilation may identified. This project will also provide dated wood for stable isotope studies and develop multi-millennial annual tree-ring chronologies for dendroclimatic studies. Thus, these data will provide high-resolution, precisely- dated estimates of climate variability for most of the Holocene in this sector of the Southern Hemisphere. This will be the longest tree-ring chronology in the world and will provide a wealth of information about high-resolution climate and radiocarbon variations back to the late-glacial period.