Climate forcing of physical and electrical properties of snow covered sea ice

积雪海冰物理和电特性的气候强迫

• 批准号: RGPIN-2017-04888
• 负责人: Yackel, John
• 金额: $ 1.97万
• 依托单位: University of Calgary
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=633993
• 关键词: Climate; forcing; physical; electrical; properties

The snow cover on first-year (FYI) sea ice is a critical component of the marine cryosphere because it controls ice accretion and ablation rates due to its relatively small thermal conductivity. The snow acts to insulate the sea ice from the warming atmosphere during the spring to summer transition and ultimately regulates winter sea ice thickness and summer melt behavior, and largely determines its mechanical strength which ultimately controls sea ice summer break-up potential.. For example, if the sea ice grows in winter with a thin snow cover, the ice thickness will be minimized. This thin snow cover is then more likely to melt earlier in spring, thereby flooding the ice surface with melt water, lowering the reflectivity and absorbing more solar radiation, leading to earlier sea ice ablation.

第一年（仅供参考）海冰上的积雪是海洋冰冻圈的重要组成部分，因为它的导热系数相对较小，因此控制着冰的增生和消融率。在春季到夏季的过渡期间，雪的作用是将海冰与变暖的大气隔离，并最终调节冬季海冰的厚度和夏季的融化行为，并在很大程度上决定其机械强度，从而最终控制海冰夏季的破裂潜力。 ，如果海冰在冬季生长，积雪很薄，冰的厚度就会最小化。这种薄薄的积雪更有可能在春季提前融化，从而使冰面被融水淹没，降低反射率并吸收更多的太阳辐射，导致海冰更早消融。