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

摘要ATM-9627318 COOK，Edward D‘Arrigo，Rosanne哥伦比亚大学标题：从塔斯马尼亚的Huon Pine亚化石中开发全新世树轮年代学用于古气候和同位素研究该奖项支持地球系统历史计划(USGCRP)内的研究，以Tasmania的Huon Pine木材开发全新世长度的绝对年代的年度树轮年代学。这份年表将被用来提供树状年代学的木材，用于开发南半球的独立放射性碳校准。这将被用来与北半球木材单独开发的校准曲线进行比较和扩展。这种木材还将被用来表征整个全新世大气放射性碳的半球间偏移量。在这样做的过程中，可以识别出异常的温盐环流和海洋通风时期。该项目还将为稳定同位素研究提供过时的木材，并为树木气候研究编制几千年的树木年轮年表。因此，这些数据将提供对南半球这一地区全新世大部分时间气候变化的高分辨率、精确日期的估计。这将是世界上最长的树轮年表，并将提供大量关于冰河晚期高分辨率气候和放射性碳变化的信息。

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.