Arctic hydrogeology and paleoclimatology

北极水文地质学和古气候学

• 批准号: 346106-2007
• 负责人: Clark, Ian
• 金额: $ 1.36万
• 依托单位: University of Ottawa
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Northern Research Supplement
• 财政年份: 2007
• 资助国家: 加拿大
• 起止时间: 2007-01-01 至 2008-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=361559
• 关键词: Arctic; hydrogeology; paleoclimatology

Canada's cryosphere constitutes roughly one half of its land mass, and is underlain by perennially frozen terrain - permafrost - that completely alters the mechanisms we know to govern water movement through watersheds in temperate landscapes. Groundwater movement through unfrozen zones in permafrost is an important component of the Arctic hydrological cycle, as it provides base flow for fish spawning habitat. It is involved in the formation of endostromatolites, biomineralizations that hold paleoclimate information as well as information on life in  extreme environments. Long-term impacts of groundwater in talik include effects on nuclear waste repositories and on mining in the north.Research in Arctic hydrogeology and paleoclimatology requires travel to remote regions of the Yukon, Northwest Territories and Nunavut. Our work in these remote regions involves the use of isotopes and geochemistry, natural tracers of water movement, that we measure in samples collected throughout the year. This application will support field work in the Arctic that involves new research collaborators and assistants from the north. It also involves graduate and undergraduate students, who will gain tremendous experience from their research in Canada's north.

加拿大的冰冻圈约占其陆地面积的一半，其下方是常年冻结的地形-永久冻土-这完全改变了我们所知道的在温带景观中管理流域水运动的机制。地下水通过永久冻土中未冻带的流动是北极水文循环的一个重要组成部分，因为它为鱼类产卵生境提供了基流。它参与了内基质层的形成，生物矿化作用保存了古气候信息以及极端环境中的生命信息。Talik地下水的长期影响包括对核废料储存库和北部采矿的影响，北极水文地质学和古气候学的研究需要前往育空地区、西北地区和努纳武特的偏远地区。我们在这些偏远地区的工作涉及使用同位素和地球化学，水运动的天然示踪剂，我们在全年收集的样本中进行测量。该应用程序将支持北极的实地工作，涉及来自北方的新研究合作者和助手。它还涉及研究生和本科生，他们将从加拿大北部的研究中获得丰富的经验。