论文部分内容阅读
2007-2012年,在东南极达尔克冰川实施了18期空间方向交会观测,解算得到了冰川的运动规律:其整体平均运动速度为0.41 m·d~(-1),平均流向的方位角为7.01°;总的来说,其冬季和夏季的流速基本相当,但冰川前缘附近的运动在冬季显得更为活跃;冰川横截面上从边缘到中心,流速逐渐增大,流速最大的点出现在冰川中轴线上,流速最小的点则出现在边界附近;沿冰川流动方向,从上游至入海口,流速亦逐渐增大,冰川前缘流速最大,此处有较多的冰裂缝发育.与之前的遥感研究结果相比较,冰川运动比较稳定,流速未发现显著变化.
During 2007-2012, 18 space-based intersections were observed in the Drk Glacier in the southeast Antarctic, and the movement law of the glacier was solved. The average moving velocity of the glacier was 0.41 m · d -1, and the azimuth of the average flow direction was 7.01 °. In general, the velocities in winter and summer are basically the same, but the movement around the front of the glacier is more active in winter. From the edge to the center, the flow velocity gradually increases and the point with the maximum flow velocity appears in the cross section of glacier On the central axis of the glacier, the point with the smallest flow velocity appears near the boundary. Along the flow direction of the glacier, the flow velocity increases from the upper reaches to the estuary, and the flow velocity at the front of the glacier reaches the maximum with more ice cracks developed. Compared with the results of previous remote sensing studies, glacier movement was relatively stable with no significant changes in flow rate.