West Antarctic Glaciology - V

该奖项旨在为一个项目提供三年的资金支持，该项目旨在回答对了解南极西部冰盖冰流至关重要的两个问题：1)罗斯冰流（B、D和E）目前是否在激增？(2)不断扩大的加里冰升对冰流B的支撑作用是什么？这两个问题都将根据从地面、空中和太空收集的数据来回答。虽然过去南极洲西部的许多变化迹象都是基于具有很大不确定性的插值和计算，但这些测量将是直接的，利用快速和准确的GPS定位，以尽量减少实地后勤需求。直接测量冰流D上部的预期变薄，并在冰流B、D和E的头部重复测量卫星图像，以检测开始区域的内陆迁移（这是持续涌流所需要的），将能够检验Bindschadler提出的涌流假设。通过将冰厚、地表高程和速度的新测量结果与20世纪50年代、70年代和80年代收集的数据进行比较，将研究ary冰升对冰流B流量的支撑影响，从而提供一个多年代际变化的时间序列。

This award is for support for three years of funding for a project designed to answer two questions of critical importance to understanding the ice flow of the West Antarctic ice sheet: 1) Are the Ross ice streams (B, D, and E) currently surging?, and 2) What has been the buttressing effect of an enlarging Crary Ice Rise on the flow of ice stream B? Both questions will be answered based on a combination of data collected on the surface, from the air and from space. While many past indications of change in West Antarctica have been based on interpolations and calculations with large uncertainties, these measurements will be direct, making use of rapid and accurate GPS positioning to minimize field logistic requirements. Direct measurement of expected thinning in the upper portion of ice stream D and repeated satellite image measurements at the heads of ice streams B, D, and E to detect the inland migration of the onset area (as is required by sustained surging) will enable a test of a surge hypothesis developed by Bindschadler. The buttressing impact of Crary Ice Rise on ice stream B's flow will be studied by comparing new measurements of ice thickness, surface elevation and velocity with data collected during the 1950s, 1970s and 1980s, providing a multi-decadal time-series of change.