Study of Recent Ice-Volume Changes Along the Margin of the East Antarctic Ice Sheet

南极洲东部冰盖的边缘， 维多利亚地的横贯南极山脉 裸露的冰层 冰原位于 冰下脊，并暴露了地层的横截面， 冰盖 冰盖内的冰碛石堆积在这些 通过消融冰来形成冰原。 冰流测年 速度，陨石积累的速度，以及 石英中的宇宙起源10 Be表明冰碛开始 形成于不到十万年前 最合理的原因是 冰碛的形成是由于 冰盖对气候条件变化的反应 无论是在堆积区还是在冰的边缘 床单。 这项调查将确定每年的消融率， 在雷克林冰碛附近的冰盖， 1986/87赛季的消融桩。 很接近- 将收集间隔的冰样本， 将通过以下方式测量不连续性和冰厚 雷达

The margin of the East Antarctic ice sheet adjacent to the Transantarctic mountains of Victoria Land contains large exposures of bare ice. The icefields are located in the lee of subglacial ridges and expose a stratigraphic cross-section of the ice sheet. Moraines within the ice sheet accumulate on these icefields by ablation of the ice. Dating based on ice-flow velocities, rates of meteorite accumulation, and the abundance of cosmogonic 10Be in quartz indicates that the moraines began to form less than 100,000 years ago. The most plausible cause for the formation of the moraines is a decrease in the thickness of the ice sheet in response to changes in climatic conditions either in the zone of accumulation or at the margin of the ice sheet. This investigation will determine the annual ablation rate of the ice sheet in the vicinity of the Reckling Moraine by recovering the ablation stakes set out during the 1986/87 season. Closely- spaced ice samples will be collected to document chronological discontinuities and ice thickness measurements will be made by radar.