Extending annual-resolution paleoclimatic records for Atlantic Canada using dendrochronology

树木年轮分析（树木年代学）可以解决许多关于过去环境条件的科学问题，并在每年的决议。加拿大的大部分地区都在一定程度上使用树木年代学方法进行了调查，但迄今为止研究最少的是大西洋海岸。这项研究的主要目标是继续填补加拿大树木年代学数据库中目前存在的差距。由于该区域现存的原始森林有限，将从有数百年历史的建筑物和该区域仅存的几棵古树中采集样本。这种方法已被证明是唯一的手段，延长树轮记录，以产生长期的，每年解决的古环境模型，长寿的树木，使我们能够在加拿大其他地方发展。数据从这个项目将被用来探索过去的温度和降水模式在加拿大大西洋，包括北大西洋涛动，具体目标是：（1）继续对该地区现存的古老森林种群进行定位和取样，以建立其年生长记录;（2）利用历史木结构来扩展该地区单个物种的生长记录;（3）利用多个物种的扩展树轮年表沿着历史气候记录来发展对陆地和海洋现象的可靠的古气候近似;（4）绘制加拿大大西洋地区微观和宏观尺度的古气候历史图。随着人类对大气影响的了解越来越深入，对可靠的区域和全球气候模型的需求从未如此之大。创建过去气候条件的稳健近似值是校准和验证这些模型的基础，这有助于我们了解过去的气候并预测加拿大和世界各地未来的气候波动。

Tree-ring analysis (dendrochronology) can address many scientific questions regarding past environmental conditions, and at an annual resolution. Most regions of Canada have been investigated to some degree using dendrochronological methods, but by far the least studied is the Atlantic Coast.The primary goal of this research is to continue to fill the gap that currently exists in the Canadian dendrochronological databank. Owing to the limited old-growth forest that remains in the region, samples will be collected both from centuries-old historical structures and from the few remnant populations of old trees that remain in the region. This approach has proven to be the only means of extending tree-ring records to produce the type of long-term, annually resolved paleoenvironmental models that long-lived trees have allowed us to develop elsewhere in Canada.Data from this project will be used to explore past temperature and precipitation patterns in Atlantic Canada, including the North Atlantic Oscillation, and to develop and map paleoclimatic reconstructions.Specific objectives are to (1) continue to locate and sample any remaining remnant populations of old-growth forest in the region to establish their annual growth records; (2) use historical wooden structures to extend the growth records of individual species in the region; (3) use the extended tree-ring chronologies from multiple species along with historical climate records to develop robust paleoclimatic approximations for both terrestrial and oceanic phenomena; and (4) map the paleoclimatic history of Atlantic Canada at micro and macro scales.As human atmospheric impacts become better understood, the need for reliable regional and global climate models has never been as great. Creating robust approximations of past climatic conditions is fundamental in calibrating and verifying these models, which help us to understand past climates and to forecast future climate fluctuations in Canada and around the world.