Further Continuation of Glaciophysical Survey of the Interior Ross Embayment (GSIRE)

进一步继续罗斯湾内陆冰川物理调查 (GSIRE)

• 批准号: 8614011
• 负责人: Charles Bentley
• 金额: $ 102.79万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-11-01 至 1991-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8614011&HistoricalAwards=false
• 关键词: Further; Continuation; Glaciophysical; Survey; Interior

Investigations of the configuration, physical properties, and dynamics of the portion of the West Antarctic inland ice sheet that flows in to the floating Ross Ice Shelf will be continued. Two seasons of field work (1987-88 and 1988-89) will be followed by one year of data analysis (1989-90). The emphasis of this work will be to study further the characteristics and distribution of the active subglacial till layer found under one section of ice stream B, to compare and contrast ice streams B and C and the intervening ridge with respect to their basal characteristics, internal physical constitutions, and surface configurations, and to conduct a reconnaissance survey of ice streams D and E. Measurement methods will include airborne radar, seismic shooting, and recording of microearthquakes. Supplementary investigations will include ground-based radar studies of crevasse depths, basal reflection strengths and depolarization phenomena, and electrical resistivity profiles. Gravity measurements, determinations of ice-movement rates, and core sampling for calculation of surface net balance rates will be carried out in cooperation with other ongoing research.

将继续调查流入漂浮的罗斯冰架的西南极内陆冰盖部分的形态、物理特性和动力学。在两个季节的实地考察(1987-88和1988-89)之后，将进行一年的数据分析(1989-90)。这项工作的重点将是进一步研究在一段冰流B下发现的活跃的冰下耕层的特征和分布，比较和对比冰流B和C以及夹在中间的山脊的基本特征、内部物理组成和表面形态，并对冰流D和E进行勘察调查。测量方法包括机载雷达、地震激发和微震记录。补充调查将包括地面雷达对裂缝深度、基本反射强度和去极化现象以及电阻率剖面的研究。重力测量、冰移速率的测定以及用于计算地表净平衡率的岩心取样将与其他正在进行的研究合作进行。