Holocene paleoceanography and climate variability in the Western Canadian Arctic Ocean: insights fromneodymium, protactinium and thorium isotopes

加拿大西部北冰洋全新世古海洋学和气候变化：来自钕、镤和钍同位素的见解

• 批准号: 444197-2013
• 负责人: MonteroSerrano, JeanCarlos
• 金额: $ 1.09万
• 依托单位: Université du Québec à Rimouski
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Northern Research Supplement
• 财政年份: 2016
• 资助国家: 加拿大
• 起止时间: 2016-01-01 至 2017-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=597003
• 关键词: Holocene; paleoceanography; climate; variability; Western

The long-term objective of this northern research supplement program is to better improve the paleoceanographic interpretation of both neodymium (Nd) isotopes and sedimentary protactinium/thorium (231Pa/230Th) ratios in the Western Canadian Arctic region. This long-term objective is paramount to validate and better interpret the results of my NSERC Discovery Grant program. To achieve this goal, I plan to compare Nd-isotopes and 231Pa/230Th measurements extracted of core-top sediments, seawater and suspended particles collected from different water depths in the Western Canadian Arctic Ocean. Therefore, in the present proposal, funds are requested to cover the high costs related to acquiring these sediment cores, seawater, and suspended particles from the continental margin of the Canadian Beaufort Sea on board the Canadian Coast Guard Ships in collaboration with ArcticNet network investigators. This northern research supplement program, together with my Discovery Grant, will provide new evidence on the different processes (e.g., boundary exchange, sea ice extent, Arctic Ocean circulation) that may impact the chemistry of seawater in the Western Canadian Arctic Ocean, as well as novel data at high temporal resolution (centennial to millennial scales) that will allow reconstructing the natural evolution and variability of climatic and oceanographic conditions in the Western Canadian Arctic Ocean during the last 10,000 years. A better understanding of past climate and oceanographic variations, better future predictions and general ocean circulation model validation will help Canada's government to implement adaptation and mitigation strategies to future climate changes in the Canadian Arctic region. This Arctic research program will also contribute with the training of the Arctic specialists needed to maintain the study and stewardship of a changing Arctic Ocean. Likewise, during each Arctic expedition, several educational activities will be scheduled in the Aurora College Community Learning Centre in Inuvik, to inform the northern communities on the natural variability in the Arctic climate-ocean system during the last 10,000 years, as well as their potential trends caused by anthropogenic climate forcing.

该北部研究补充计划的长期目标是更好地改善尼多岛（ND）同位素和沉积物protactinium/thorium/ther（231pa/230th）比率的古文学解释。这个长期目标对于验证和更好地解释我的NSERC Discovery Grant计划的结果至关重要。为了实现这一目标，我计划比较从加拿大西部北极海洋中不同水深收集的核心沉积物，海水和悬浮颗粒提取的ND同位素和第231PA/230次测量。因此，在本提案中，要求资金支付与从加拿大Beaufort Sea在加拿大海岸警卫队与Arcticnet Network Network Network研究人员合作的加拿大Beaufort Sea大陆边缘从加拿大Beaufort Sea大陆边缘获得这些沉积物核心，海水和悬浮颗粒有关的高昂成本。该北部研究补充计划以及我的发现补助金将提供有关不同过程（例如边界交换，海冰范围，北极海洋循环）的新证据，可能会影响西部北极海洋中海水的化学性能，以及在加拿大北极海洋中的新数据，以及在高度分辨率上的新数据，可以使高度分辨率（千禧年范围内的千年范围）进行自然范围的范围，以使天然侵蚀性和变化范围的水平范围内的范围，并在自然范围内进行了变化，并将其定为高度的海洋，并将其置于自然范围的范围内。过去10，000年。更好地了解过去的气候和海洋学变化，更好的未来预测和一般的海洋流通模型验证将有助于加拿大政府实施适应和缓解策略，以实施加拿大北极地区未来气候变化的适应性和缓解策略。该北极研究计划还将在维持不断变化的北极海洋研究和管理所需的北极专家培训中做出贡献。同样，在每次北极探险期间，将安排在Inuvik的Aurora College社区学习中心进行几项教育活动，以告知北部社区在过去的10,000年中北极气候 - 海洋系统的自然变异性，以及它们的潜在趋势以及由人为气质激励强迫引起的潜在趋势。