International Symposium on Fast Glacier Flow

OPP-0119714 Echelmeyer首席研究员正在申请南极冰川学和北极自然科学计划的资金，以支持几名外国科学家和美国研究生参加关于快速冰川流动的国际研讨会。1986年，举行了一次关于快速冰川流动的查普曼会议，聚集了积极参与研究汹涌而快速的潮水冰川和冰川流动的科学家。这次会议阐明了几个悬而未决的问题，这些问题促成了南极和北极的许多跨学科研究。自1986年以来，我们在理解快速冰川流动所涉及的性质和过程及其对全球气候和海洋系统的影响方面取得了许多重要的新进展。例如，西南极冰盖倡议将高度变形的冰下冰层和边缘剪切带冰动力学的作用作为快速冰川运动的重要过程放在了最前列。这项研究为研究北极汹涌的冰川开辟了新的途径。对格陵兰岛出口冰川和阿拉斯加潮水冰川的详细研究对于确定快速冰川流动和冰山崩解在冰盖物质平衡中的作用，以及它们在冰盖解体中的作用及其通过海因里希型事件对海洋循环的影响具有重要意义。使用了新的遥感技术来阐明南极洲和北极的冰流和涌浪型冰川的特征，包括查明格陵兰东北部的一条大冰流，以及南极洲的松岛/斯韦茨流域可能迅速下降。由于这些令人振奋的新发展，首席研究员将于2002年在阿拉斯加雅库塔主持由国际冰川学会主办的关于快速冰川流动的国际研讨会。雅库塔特位于北美最大、最活跃的潮水和汹涌的冰川之列。会议将通过阿拉斯加大学费尔班克斯分校的地球物理研究所组织。这项提议寻求资金来支付组织和开展这次研讨会的部分费用。将致力于快速冰川运动这些不同方面的南极和北极科学家聚集在一起，应该会促进对当前知识状况的热烈讨论和思想交流。研讨会将聚焦于冰川快速流动这一最紧迫的悬而未决的问题，从而引发对未来国际跨学科研究方向的讨论。研讨会上的口头和海报陈述产生的同行评议论文将发表在《冰川年鉴》上。

AbstractOPP-0119714EchelmeyerThe Principal Investigator is requesting funds from the Antarctic Glaciology and Arctic Natural Sciences Programs to support the participation of several foreign scientists and U.S. graduate students at an International Symposium on Fast Glacier Flow. In 1986, a Chapman Conference on Fast Glacier Flow was held to bring together scientists who were actively involved in the study of surging and fast tidewater glaciers, and ice stream flow. The meeting illuminated several outstanding problems which contributed to numerous inter-disciplinary studies in the Antarctic and Arctic.Since 1986, there have been many important new developments in our understanding of the properties and processes involved in fast glacier flow and of its consequences in the global climate and ocean systems. For example, the West Antarctic Ice Sheet initiative has brought the roles of highly deformable subglacial till and marginal shear-zone ice dynamics to the forefront as important processes in fast glacier motion. This research has led to new approaches in the study of surging glaciers in the Arctic. Detailed studies of outlet glaciers in Greenland and tidewater glaciers in Alaska have been important in determining the roles of fast glacier flow and iceberg calving in ice sheet mass balance, as well as their roles in ice sheet disintegration and their effects on ocean circulation through Heinrich-type events. New remote sensing techniques have been used to illuminate features of ice stream flow and surge-type glaciers in both Antarctica and the Arctic, including the identification of a large ice stream in northeast Greenland and possible rapid drawdown of the Pine Island/Thwaites drainage basins in Antarctica. Because of these exciting new developments, the Principal Investigator will host an International Symposium on Fast Glacier Flow in 2002 sponsored by the International Glaciological Society in Yakutat, Alaska. Yakutat is located among the largest and most active tidewater and surging glaciers in the North America. The meeting will be organized through the Geophysical Institute, University of Alaska - Fairbanks. This proposal seeks funds to partially defray the cost of organizing and carrying out this symposium.Bringing together Antarctic and Arctic scientists working on these different aspects of rapid ice motion should promote vigorous discussion and an exchange of ideas on the current state of knowledge. The symposium will focus on the most pressing unanswered questions of fast glacier flow, leading to discussions of future directions for international, inter-disciplinary research. Peer-reviewed papers resulting from oral and poster presentations at the symposium will be published in the Annals of Glaciology.