Damming and Flooding of Russell Fiord by Rapidly Advancing Hubbard Glacier, Yakutat, Alaska

提供资金支持一个快速奖，以研究动态的哈伯德冰川，雅库塔特，阿拉斯加的舌头。 预计哈伯德冰川的持续推进？的潮汐终点站将很快在吉尔伯特点建立一个冰坝，关闭连接祛魅湾和罗素峡湾的潮汐通道，形成一个64公里长的湖泊。这一自然现象很少被观察到，而由一个前进的冰川形成的冰坝代表了一个监测这一过程的无与伦比的机会。这项研究将记录预期的冰坝形成和分析的过程，力学和因素决定的方法和关闭的风格，大坝的稳定性和/或故障。了解冰缘的动态对于了解冰坝是如何形成的以及它们作为罗素峡湾永久关闭的性能至关重要。在推进和关闭期间，仪器测量加上连续图像分析将检查冰缘海洋环境与监测的冰流和冰结构在坝址。 此外，如果在冰坝后面形成湖泊，将监测湖泊的淡水化演变。

Funds are provided in support of a RAPID award to study the dynamics of the tongue of Hubbard Glacier, Yakutat, Alaska. It is anticipated that the sustained advance of Hubbard Glacier?s tidewater terminus will soon create an ice dam at Gilbert Point, closing the tidal channel linking Disenchantment Bay with Russell Fiord and forming a 64 km long lake. The natural event has only rarely been observed and the creation of an ice dam by an advancing tidewater glacier represents an unparalleled opportunity to monitor the process. This study will document the anticipated formation of the ice dam and analyze the processes, mechanics and factors determining method and style of closure, dam stability and or failure. Understanding the dynamics of the ice margin is crucial to understanding how ice dams are created and their performance as a permanent closure to Russell Fiord. During the advance and closure, instrumental measurements coupled to sequential image analysis will examine the ice marginal marine environment in relation to monitored ice flow and ice structure at the dam site. Additionally, if a lake is formed behind the ice dam, the freshening evolution of the lake will be monitored.