Multi-millennia dendrochronology in the British Columbia coast mountains

在过去二十年里，对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宝贵代用数据来源。阐明固有的自然变异性和回答有关加拿大太平洋地区更长的州尺度气候变化的问题的关键是从活的和亚化石树木建立超长古气候记录的发展。该项目扩大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气候变化的年度分辨率记录。将对已知的古代森林林分进行重新采样，以加深和延长我们现有的>800年历史的环宽编年史的持续时间。重点将放在从海岸山脉山区的小湖泊和池塘中取样淹没在水中的原木，这些原木可能保存了数千年。然后，复合树轮年表将来自活树、死立木和从小湖泊中回收的亚化石木材，以产生一个向后延伸数千年的超长树轮年表。这项研究使树木年代学界、非营利研究人员、林业和其他可以利用这些数据制定气候变化情景的人之间建立联系。这项研究提供了基本信息，以促进我们对加拿大太平洋地区气候变化影响的了解，并协助提供了对制定资源管理解决方案至关重要的信息，这些解决方案将确保加拿大森林、森林产品工业和冰川水供应的长期活力。

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.