Sea ice physical properties and their application to ocean-atmosphere interaction

海冰物理特性及其在海洋-大气相互作用中的应用

• 批准号: RGPIN-2015-03842
• 负责人: Galley, Ryan
• 金额: $ 1.46万
• 依托单位: University of Manitoba
• 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=634102
• 关键词: Sea; ice; physical; properties; their

The long-standing concept that ocean-atmosphere interaction cannot occur through sea ice is invalid. We now understand sea ice provides a variably effective conduit for ocean-atmosphere exchange, particularly for CO2. It is now thought that sea ice (depending on its temperature) may produce CO2 as it forms or grows, which may be trapped within the ice and eventually exported to the deep ocean. These interactions are modulated by the shape, location and connectivity of its liquid and gas inclusions, the intrinsic properties of which are controlled by a vertical temperature gradient within the ice and depend also on the sea ice type and age. We aim to characterize the size, shape, location and connectedness of liquid and gas inclusions in sea ice and changes therein from formation to melting. These results are imperative in determining how much atmospheric CO2 may be sequestered in polar oceans over an annual cycle both through, and as a result of, sea ice processes.

长期以来认为海洋与大气相互作用不能通过海冰发生的观念是无效的。我们现在了解到，海冰为海洋-大气交换（特别是二氧化碳）提供了一种不同有效的渠道。现在人们认为，海冰（取决于其温度）在形成或生长时可能会产生二氧化碳，这些二氧化碳可能被困在冰中并最终排放到深海。这些相互作用受到其液体和气体包裹体的形状、位置和连通性的调节，其固有特性由冰内的垂直温度梯度控制，并且还取决于海冰的类型和年龄。我们的目标是表征海冰中液体和气体包裹体的大小、形状、位置和连通性，以及其中从形成到融化的变化。这些结果对于确定每年一次的极地海洋中通过海冰过程以及海冰过程可能封存多少大气二氧化碳至关重要。