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

将继续对流入漂浮的罗斯冰架的南极西部内陆冰盖部分的结构、物理性质和动力学进行调查。两个季节的实地工作（1987- 1988年和1988- 1989年）之后将进行一年的数据分析（1989- 1990年）。本工作的重点将是进一步研究冰流B剖面下的冰下活土层的特征和分布，比较和对比冰流B和冰流C及其间脊的基本特征、内部物理结构和表面结构。并对冰流D和e进行侦察调查。测量方法将包括机载雷达、地震拍摄和微地震记录。补充调查将包括对裂缝深度、基底反射强度和去极化现象以及电阻率剖面的地面雷达研究。重力测量、冰移动速率的确定以及用于计算地表净平衡速率的岩心取样将与其他正在进行的研究合作进行。

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.