Collaborative Research: P2C2--Reconstructing Spatiotemporal Climatic Patterns for Northeastern Canada

这个合作项目的目标是从蓝色强度（BI被提议作为密度的直接代理）和细胞数量（CN），管腔直径（LD）和细胞壁厚度（CWT）的三个解剖测量中生成新的树木年轮数据，所有这些都与气候有关。 将沿着一个纬度样带收集新的树木年轮样本，以填补古气候数据中的一个大的空间空白，并有可能推断过去几个世纪气候变化的空间变化和模式。该样带从纽芬兰南部沿海到近沿海地区，从拉布拉多东南部到拉布拉多中部的Mealy Mountains公园和保护区，以及Nain北部Napaktok峡湾附近的纬度树线和北部的离群点。这些新的数据集将用于更新现有的数据集，更好地量化过去的气候和环境变化，并将记录扩展到中世纪气候异常。拉布拉多和纽芬兰的气候在很大程度上取决于北大西洋西部的大气-海洋动力学，包括拉布拉多海的影响，拉布拉多海是地球温盐环流系统的关键组成部分。 其他影响包括主导气候模式，如北大西洋涛动（NAO）。 重建西北大西洋部分的海表温度、陆地温度、海冰范围和水文气候，以及分析仪器和再分析数据，有可能提高目前对这一高度动态区域气候变化的认识。首要的研究问题是：1）该地区长期气候变率的根本原因和模式是什么？2)人类活动时期的气候与前几个世纪相比如何？该项目涉及一种独特的、具有潜在变革性的分析技术（即，蓝色强度）探索环极地区的气候过程。还向拉布拉多最北端的Nain村进行了宣传，那里的社区必须在最近的极端气候中科普严峻的社会经济挑战。

This collaborative project generally aims to generate new tree-ring data from Blue Intensity (BI is proposed as a direct proxy for density) and three anatomical measurements of cell number (CN), lumen diameter (LD) and cell wall thickness (CWT) all of which have proposed links to climate. New tree-ring samples will be collected along a latitudinal transect to fill a large spatial gap in paleoclimatic data and potentially allow the inference of spatial shifts and patterns in climatic variability over the past several centuries. This transect extends from southern, coastal to near-coastal sites in Newfoundland and southeastern Labrador to the Mealy Mountains Park and Reserve in central Labrador, and to latitudinal treeline near Napaktok Fjord north of Nain and outlier sites just to the north. These new collections will be used to update existing datasets and better quantify past climate and environmental variability across space and time and extend the record into the Medieval Climate Anomaly.The climate of Labrador and Newfoundland is largely determined by the prevailing western North Atlantic's atmosphere-ocean dynamics including effects of the Labrador Sea, a key component of the Earth's thermohaline circulation system. Other influences include dominant climate modes such as the North Atlantic Oscillation (NAO). Reconstructions of northwest Atlantic sector sea surface temperatures (SST), land temperature, sea-ice extent and hydroclimate, as well as analyses of instrumental and reanalysis data, could potentially improve the current knowledge of climate change in this highly dynamic region. The overarching research questions are: 1) What are the underlying causes and patterns of long-term climate variability across the region? 2) How does the climate of the anthropogenic period compare with prior centuries?This project involves the potential for a unique and potentially transformative analytical technique (i.e., Blue Intensity) for exploring climate processes in circumpolar regions. There is also outreach to Labrador's northernmost village of Nain, where communities must cope with severe socioeconomic challenges amid recent climatic extremes.