Surge of Bering Glacier and Bagley Ice Field, Alaska: an update to August 1995 and an interpretation of brittle-deformation patterns
Surge of Bering Glacier and Bagley Ice Field, Alaska: an update to August 1995 and an interpretation of brittle-deformation patterns
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阿拉斯加白令冰川和巴格利冰原的涌动：1995 年 8 月的更新和脆性变形模式的解释
DOI：
10.3189/s0022143000035012
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发表时间：
1997
影响因子：
3.4
通讯作者：
H. Mayer
中科院分区：
文献类型：
--
作者：
U. Herzfeld;H. Mayer
摘要 1993年、1994年和1995年夏天，在白令冰川和巴格利冰原系统（阿拉斯加）上空进行的一系列系统调查飞行中收集了视频和全球定位系统位置数据以及35毫米照片，以描述涌流裂缝模式和涌流传播的特征。在 1995 年 8 月下旬的调查飞行中，我们观察到 1993-94.白令冰川的涌动仍在继续，并且仍在扩大，影响到巴格利冰原更远的新区域。新的裂缝场在模式上与我们于 1993 年 6 月在基特洛夫山下方和白令冰川中部其他偏远地区以及在 1994 年 7 月在白令冰川顶部附近（靠近白令冰川和巴格利冰原的交界处，在上白令冰川和巴格利冰原中）观察到的第一批涌流裂缝类似，正在巴格利冰原东部和巴格利冰原的“Stellet”一侧开放。在新油田中看到的裂缝类型表明，潮汐正在蔓延到这些地区。通过对裂缝模式中明显的脆性变形模式的分析和解释，可以推断出过去的涌动运动学框架的某些方面。这种方法可能会导致对冰面结构进行更一般的分类，并将其与正在进行的过程联系起来。
Abstract In the summers of 1993, 1994 and 1995, video and Global Positioning System location data and 35 mm photographs were collected in a series of systematic survey flights undertaken over the Bering Glacier and Bagley Ice Field system (Alaska) in an effort to characterize surge-crevasse patterns and surge propagation. During survey flights in late August 1995, we observed that the 1993–94. Bering Glacier surge was continuing and still expanding affecting new areas farther up in Bagley Ice Field. New crevasse fields, similar in pattern to the first surge crevasses we had observed in June 1993 below Khitrov Hills and in other isolated areas of central Bering Glacier and in July 1994 near the head of Bering Glacier (near the junction of Bering Glacier and Bagley Ice Field, in both upper Bering Glacier and Bagley Ice Field), were opening in eastern Bagley Ice Field and in the “Stellet” side of Bagley Ice Field. The type of crevasses seen in the new fields suggested that the surge was propagating into these areas. By analysis and interpretation of the brittle-deformation patterns apparent in the crevasse patterns, some aspects of the past kinematic framework of the surge can be deduced. This approach may lead to a more general classification of ice-surface structures and to their linkage to ongoing processes.