Collaborative Research: P2C2--Reconstructing North Pacific Climate Variability Using a Multi-Millennial Tree-Ring Resource for Glacier Bay, Alaska

利用现有的树木年轮样本和来自冰川湾国家公园和保护区的新样本，为北太平洋沿岸和北方北美洲开发过去10 000年来气候和冰川活动的千年树木年轮记录提供资金。科学目的是加深对北太平洋气候变率的了解，以帮助预测北美西部在年到数十年时间尺度上的气候。研究人员将采用一系列假设来指导他们的研究，即：1）相对于过去几千年的全新世北太平洋热历史，最近一段时期的人类活动变化是独特的; 2）北太平洋气候的年代际和长期变率并不反映一个真正的动力模态，而是不同模态相互作用的结果（例如~20年和50年周期），可以联合收割机产生这种变化;（3）内部（北太平洋）和外部（例如太阳）强迫在过去几千年中对北太平洋气候产生了重大影响; 4）北太平洋海气气候变化存在千年尺度的节律; 5）北太平洋和热带气候之间在体制转换和其他特征方面存在着强有力的联系，反射耦合大气-更广泛的影响包括支持本科生和研究生，以及提供关于一个被认为是海洋变化的区域的新数据。气候变化的领头羊

Funding is provided to develop a multi-millennial tree-ring record of past climate and glacier activity over the last 10,000 years for the North Pacific Rim and northern North America by using existing tree-ring samples and new samples from Glacier Bay National Park and Preserve. The scientific goal is to develop a greater understanding of North Pacific climate variability to aid efforts in predicting western North American climate on annual to multi-decadal time scales.The researchers will pursue a series of hypotheses to guide their research, namely: 1) the recent period of anthropogenic change has been unique relative to the Holocene North Pacific thermal history of the past several millennia; 2) multi-decadal and longer-term North Pacific climate variability does not reflect a true dynamical mode, but instead results from the interaction of different modes of variation (e.g. ~20 and 50 year cycles) that can combine to produce such shifts; 3) both internal (North Pacific) and external (e.g. solar) forcings have significantly impacted North Pacific climate over the past several millennia; 4) there is a millennial-scale rhythm to North Pacific ocean-atmosphere climate variability; and 5) robust linkages exist between North Pacific and tropical climate with regards to regime shifts and other features, reflecting coupled atmosphere-ocean modes of variability.The broader impacts involve supporting undergraduate and graduate students as well as providing new data on a region considered to be a bellwether of changing climate.