Multi-millennia dendrochronology in the British Columbia coast mountains

在过去二十年中，气候科学的重大贡献已经牢固地确立了树木年轮作为评估大气-海洋尺度长期气候趋势的有价值的代理数据来源。对于阐明加拿大太平洋地区固有的自然变率和回答有关更长期的州尺度气候变化的问题至关重要的是发展由活树和亚化石树建立的超长古气候记录。该项目扩展了维多利亚大学树木年轮实验室正在进行的研究，并试图从树木年轮记录中开发出每年解决的气候变化记录。已知的古森林林分将被重新采样，以加深和延长我们现有的800年的年轮宽度年表的持续时间。重点将放在从海岸山脉山区的小湖泊和池塘中取样淹没的原木上，这些原木可能保存了数千年。然后，合成的树木年轮年表将从活着的树木、死去的原木和从小湖泊中恢复的亚化石木材中产生一个超长的树木年轮年表，可以追溯到几千年前。这项研究允许发展树木年代学群落、非营利研究人员、森林工业和其他可以利用这些数据制定气候变化情景的人之间的联系。这项研究为进一步了解加拿大太平洋地区气候变化的影响提供了基础信息，并为制定资源管理解决方案提供了关键信息，这些解决方案将确保加拿大森林、林产品工业和冰川来源的水供应的长期活力。

Significant contributions to climate science within the last two decades have firmly established tree-rings as valuable sources of proxy data for evaluating long-term climate trends at the atmosphere-ocean scale. Crucial to elucidating the inherent natural variability and answering questions about longer state-scale climate shifts in Pacific Canada is the development of supra-long paleoclimatic records built from living and subfossil trees. The project expands upon research underway at the University of Victoria Tree-Ring Laboratory and seeks to develop annually-resolved records of climatic variability from tree ring records. Known ancient forest stands will be re-sampled to deepen and extend the duration of our existing >800 year old ring-width chronologies. Focused attention will be given to sampling submerged logs, potentially preserved for thousands of years, from small lakes and ponds at montane sites in the Coast Mountains. Composite tree-ring chronologies will then be from living trees, dead standing logs and subfossil wood recovered from small lakes to produce a supra-long tree-ring chronology extending backwards thousands of years. The research allows for the development of linkages between the dendrochronological community, non-profit researchers, the forest industry and others who can use these data in the development of climate change scenarios. The research provides information fundamental to furthering our knowledge of the impact of climate changes in Pacific Canada, and assists with information crucial for developing resource management solutions that will ensure the long-term vitality of Canada's forests, forest product industries and glacier-derived water supplies.