LUMINESCENCE DATING OF CLIMATE-SENSITIVE SEDIMENTS IN YUKON

育空地区气候敏感沉积物的发光测年

• 批准号: 362077-2013
• 负责人: Lamothe, Michel
• 金额: $ 1.09万
• 依托单位: Université du Québec à Montréal
• 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=595839
• 关键词: LUMINESCENCE; DATING; CLIMATE; SENSITIVE; SEDIMENTS

In the Canadian North, the most economically and socially threatening impact of Global Warming in centuries to come will be the degradation of permafrost. Yukon is known to host sedimentary archives that could be used to interpret past sensitivity of physical environments to climate change. Among those, fossil ice wedges are probably the most spectacular witnesses of past climate conditions. Loess, glaciers as well as glacial deposits indicators of former ice limits are part of a continuum of paleoclimate proxies that are unique to Yukon. Past climate processes are nonetheless obscured by the poorly constrained geological age of these features.

在加拿大北部，未来几个世纪全球变暖对经济和社会最具威胁的影响将是永久冻土的退化。众所周知，育空地区拥有沉积档案，可用于解释过去物理环境对气候变化的敏感性。其中，冰楔化石可能是过去气候条件最壮观的见证。黄土、冰川以及冰层沉积物是育空地区特有的古气候指标连续体的一部分。尽管如此，过去的气候过程仍然被这些特征的地质年龄限制不严所掩盖。