ACCELERATED ABLATION AT A GLACIER ICE-CLIFF MARGIN, DRY VALLEYS, ANTARCTICA
ACCELERATED ABLATION AT A GLACIER ICE-CLIFF MARGIN, DRY VALLEYS, ANTARCTICA
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DOI：
10.2307/1551002
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发表时间：
1987-02
期刊：
影响因子：
--
通讯作者：
T. Chinn
中科院分区：
文献类型：
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作者：
T. Chinn
寒冷冰川的悬崖边缘在极地地区很常见，是融水的重要来源。由于太阳角度较低，悬崖表面比冰川表面接受更多的太阳辐射，因此融化速度更快。冰崖的消融作用特别明显，融化在季节早期开始，悬崖撞击陡峭的（岩石）斜坡。在不崩解的平缓冰崖上，差异消融可以形成冰阶，这反过来又通过增加冰崖面的面积来增加消融。
Cliffed margins of cold glaciers are common in polar regions and are an important source of meltwater. Because of low sun angles, the cliff face receives more solar radiation than does the upper glacier surface and therefore melts at a faster rate. Ablation of an ice-cliff is particularly enhanced, and melt is initiated early in the season where the cliff impinges against a steep (rock) slope. On subdued ice cliffs which do not calve, differential ablation can form ice terraces, which in turn increase ablation by increasing the area of ice-cliff faces.