Internal Stratigraphy and Basal Conditions at the Margins ofActive Ice Streams of the Siple Coast, Antarctica

南极洲西普尔海岸活动冰流边缘的内部地层和基础条件

• 批准号: 9725882
• 负责人: Charles Raymond
• 金额: $ 25.16万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-01-15 至 2001-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9725882&HistoricalAwards=false
• 关键词: Internal; Stratigraphy; Basal; Conditions; Margins

9725882 Raymond This award is for support for a program of surface-based radio echo sounding to examine the geometry of the internal layering and the presence or absence of thawed zones outside the margins of active Ice Streams B and E and across the flow band feeding Ice Stream D. Melting in the marginal shear zone and/or on the bed outside an ice stream relates to the amount of support of the ice stream from the sides compared to the bed and the conditions that limit expansion of its width. Radar observations will be extended over the crest of adjacent inter-ice-stream ridges (B/C and D/E) and areas next to the flow band in the onset of D. The purpose is to examine internal layering indicative of the histories of these areas adjacent to ice streams and to determine whether ice streams have expanded into these presently stable areas in the past. These goals concerning the physical controls and history of ice stream width relate to how the discharge of ice streams has changed in the past and could change in the future to affect sea level.

9725882 Raymond该奖项是为了支持一项基于地面的无线电回波探测计划，以检查内部分层的几何形状以及活跃冰流B和E边缘之外以及穿过冰流D的流动带的解冻区的存在或不存在。 在边缘剪切区和/或冰流外部的冰床上的融化与冰流相对于冰床从侧面的支撑量以及限制其宽度扩展的条件有关。 雷达观测将扩展到邻近冰流间脊（B/C和D/E）的顶部以及D开始时流动带附近的区域。 其目的是检查内部分层指示这些地区的历史邻近冰流，并确定冰流是否已扩展到这些目前稳定的地区在过去。 这些关于冰流宽度的物理控制和历史的目标涉及到冰流的排放在过去如何变化以及在未来如何变化以影响海平面。