The effects of Arctic sea fog on glacier melt

北极海雾对冰川融化的影响

• 批准号: 262949-2013
• 负责人: Jiskoot, Hester
• 金额: $ 1.97万
• 依托单位: University of Lethbridge
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=654691
• 关键词: effects; Arctic; sea; fog; glacier

Breakup of Arctic sea ice causes fog, which is often the dominant cloud type in summer over oceans and coastal regions. Fog diminishes inland. Rapid recent climate change has affected cloudiness over Arctic ocean and land, but it is not clear how this has affected coastal regions. Many Arctic glaciers are located in the coast-to-inland transition zone, and those coastal glaciers with frequent summer fog covering their lower elevations experience reductions in melt. Although this has been recognized, understanding of fog extent and trends in coastal transition zones and regional and local effects of fog on glacier melt and behaviour is limited. ****This research uses weather data and satellite imaging to document summer fog and glacier length, area and melt changes over various timescales in Arctic coastal regions of Canada and Greenland. These measurements will be combined with atmospheric data to create glacier melt models that include the influence of fog. The combined information from these methods will help in our understanding of spatial and temporal trends in fog, how fog affects glaciers and how glaciers are changing. The outcomes of this research program will aid in the understanding of processes related to glacier melt and glacier fluctuations, and the ability to predict the response of land-terminating and ocean-terminating glaciers to climate change. The documented trends in fog over time and space, as well as changes in Arctic glaciers, will also benefit other research fields.

北极海冰的破裂导致雾，雾通常是夏季海洋和沿海地区的主要云类型。雾在内陆减弱。最近的快速气候变化影响了北冰洋和陆地的云量，但尚不清楚这对沿海地区的影响。许多北极冰川位于沿海到内陆的过渡地带，那些经常有夏季雾覆盖其低海拔的沿海冰川融化减少。虽然这一点已经得到承认，但对沿海过渡区雾的范围和趋势以及雾对冰川融化和行为的区域和地方影响的了解有限。* 这项研究使用天气数据和卫星成像来记录加拿大和格陵兰岛北极沿海地区不同时间尺度的夏季雾和冰川长度，面积和融化变化。这些测量结果将与大气数据相结合，以创建包括雾影响的冰川融化模型。这些方法的综合信息将有助于我们了解雾的时空趋势，雾如何影响冰川以及冰川如何变化。这项研究计划的成果将有助于了解与冰川融化和冰川波动有关的过程，以及预测陆地终止和海洋终止冰川对气候变化的反应的能力。记录的雾随时间和空间的变化趋势，以及北极冰川的变化，也将有利于其他研究领域。