摘要
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.
18 filed campaigns of space intersection were taken to monitor the flowof the Dark Glacier in East Antarctica during 2007- 2012. The monitor indicated that the average velocity was 0. 41 meters per day and the azimuth of the average direction of the flowwas 7. 01 degree. Generally,the flowvelocity in summer was nearly that in winter. However,the flownear the front of the glacier seemed to be more positive in winter. The flowbecame faster and faster towards the central line from the glacier boundary. The highest speed appeared in the central line and the lowest speed appeared in the boundary area. Along the glacier flowdirection,the same flowpattern could be seen,i. e.,flowvelocity increased towards the terminus from the upstream. The highest speed appeared in the frontier,where more cracks took place. Compared to the former researches,the Dark Glacier seems no significant change in flowvelocity.
出处
《冰川冻土》
CSCD
北大核心
2015年第5期1150-1159,共10页
Journal of Glaciology and Geocryology
基金
中央高校基本科研业务费专项(201413006)
国家重大科学研究计划(2013CBA01804
2012CB957701)
国家自然科学基金(41176173)
南北极环境综合考察及资源潜力评估专项(CHINARE2015)资助
关键词
南极
达尔克冰川
流速
Antarctica
Dark Glacier
flow velocity
