The Arctic-Atlantic gateway of the Northwest Passage: oceanic exchange, paleoceanography, paleoclimate, proxy calibration and refinement

我的研究小组致力于确定加拿大北极地区的海洋环境如何自上一个冰河时代（约22，000年前）至今因气候变化而发生变化。该研究计划的重点是西北航道（NWP）-大西洋和太平洋之间通过加拿大北极群岛（CAA）浅海峡的历史路线-是从北冰洋到北大西洋的热量和水运输的重要门户。该区域受到最近气候变化的影响，经历了明显的变化，如季节性海冰覆盖面积减少。这些变化迫切需要加拿大的管理，以促进日益重要的社会和经济问题。因此，我及时的研究计划将产生与北极社区和决策者高度相关的新知识，预计NWP的使用将扩大，因为进一步的气候变化将使该地区成为广泛的船舶交通。这项研究计划的主要目标是显着推进我们的基本知识，如何以及何时CAA成为北极-大西洋海洋通流的门户后，在这个地区的大冰盖的最后一次消亡，并提高我们对极地群岛如何应对气候变化的理解在过去和最近。另一个目标是将最近的NWP环境变化纳入长期地质记录，并确定是否存在可识别的相似性。这项研究需要采取综合办法，利用船基实地研究（海洋沉积物岩心及其所含生物和地球化学信息）和海洋学建模来跟踪海洋通流建立的时间和方式，并描述主要环境条件（海冰覆盖、水温、生态系统生产力）。这些数据用于确定控制北极-大西洋门户连通性的因素。为了帮助解释来自海洋岩心（延伸到遥远的过去）的证据并提供现代背景，该方案还将生成关于海底表层沉积物（代表当今）生物和地球化学特征的宝贵数据集。 * 这项拟议的计划代表了一种创新的，综合的和及时的研究方法，以研究作为全球海洋门户的极地群岛的长期海洋学和气候发展。这种知识是整个北冰洋了解极地对气候变化的反应的先决条件。该计划将培训12名HQP，并为他们提供海洋地质，地球化学和微古生物技术方面的宝贵技能。此外，学生将获得现场规划，管理技能的专业知识，并获得在远程环境中工作的经验，为他们在学术界，工业界和政府中担任领导角色做好准备。

My research group works to determine how the marine environments of Arctic Canada have changed in response to climate change since the last Ice Age (~22,000 years ago) to the present. The focus of this research program, the Northwest Passage (NWP) – the historical route between the Atlantic and Pacific oceans via the shallow channels of the Canadian Arctic Archipelago (CAA) – is a crucial gateway for heat and water transport from the Arctic Ocean to the North Atlantic. This region has been affected by recent climate change, experiencing pronounced shifts such as decreasing seasonal sea-ice cover. Such changes urgently require Canadian stewardship to contribute to issues of growing social and economic importance. As such, my timely research program will generate new knowledge highly relevant to Arctic communities and decision makers in anticipation of expanded NWP use, as further climate change opens up this region for extensive ship traffic.***The principal objective of this research program is to significantly advance our fundamental knowledge of how and when the CAA became a gateway for Arctic-Atlantic ocean throughflow after the last demise of the great ice sheets in this region, and to improve our understanding of how polar archipelagos respond to climate change both in the past and recently. Another objective is to place recent NWP environmental changes into the long-term geological record and determine whether there are identifiable similarities. This research requires an integrated approach that uses ship-based field studies (marine sediment cores and their included biological and biogeochemical information) with oceanographic modeling to track the timing and style of establishment of oceanic throughflow and to characterize the prevailing environmental conditions (sea-ice cover, water temperatures, ecosystem productivity). These data are used to determine factors controlling Arctic-Atlantic gateway connectivity. To aid in interpreting evidence from marine cores (extending into the distant past) and provide a modern context, this program will also generate valuable data sets on biological and biogeochemical characteristics of surface seabed sediments (which represent the present day). ***This proposed program represents an innovative, integrated and timely research approach to studying the long-term oceanographic and climatic development of polar archipelagos serving as global ocean gateways. Such knowledge is a pre-requisite for an Arctic Ocean-wide understanding of polar responses to climate change. This proposed program will train 12 HQP and provide them with invaluable skills in marine geological, biogeochemical and micropaleontological techniques. Additionally, students will gain expertise in field planning, management skills and gain experience working in remote settings, preparing them to take on leadership roles in academia, industry, and government.**