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使年轮牢固地成为评估大气-海洋尺度长期气候趋势的宝贵替代数据来源。要阐明加拿大太平洋地区固有的自然变异性和回答有关更长时间的国家尺度气候变化的问题，关键是建立由活树和亚化石树木建立的超长古气候记录。该项目在维多利亚大学树轮实验室正在进行的研究的基础上进行扩展，并寻求从树轮记录中开发出每年可分辨的气候变化记录。已知的古森林林将被重新取样，以加深和延长我们现有的&gt；800年环宽年代学的持续时间。将重点关注从海岸山脉山地遗址的小湖泊和池塘中采样淹没的原木，这些原木可能保存了数千年。然后，从活的树木、死的直立木材和从小湖泊中发现的亚化石木材中提取合成树轮年表，以产生追溯到数千年前的超长树轮年表。这项研究允许在树种年代学社区、非营利性研究人员、森林行业和其他可以在气候变化情景制定中使用这些数据的人之间建立联系。这项研究为我们进一步了解加拿大太平洋地区气候变化的影响提供了基本信息，并为制定资源管理解决方案提供了至关重要的信息，这些解决方案将确保加拿大森林、林产工业和冰川供水的长期活力。

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.