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Volume measurements of Mittivakkat Gletscher, southeast Greenland

机译:格陵兰岛东南部Mittivakkat Gletscher的体积测量

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摘要

Here we present ground-penetrating radar measurements of Mittivakkat Gletscher, southeast Greenland, to estimate an empirical volume-area scaling relationship at an individual glacier. Between a previous direct volume survey in 1994 and one in 2012, the glacier volume has decreased from 2.02 km(3) to 1.44 km(3) while the study area has decreased from 17.6 km(2) to 15.8 km(2). These results are in accordance with the cumulative mass loss observed by long-term mass-balance measurements (1995/96-2011/12) at Mittivakkat Gletscher and confirm that the glacier is in severe climatic disequilibrium (AAR = 0.17). The observed scaling exponent gamma = 3.14 and coefficient c = 0.00025 km(3-2 gamma) are outside the range of global scaling parameters but sensitive to small uncertainties. Nevertheless, existing global volume-area scaling relationships estimate the volume of Mittivakkat Gletscher within 31% and 15% of the measured 1994 and 2011 volumes, respectively.
机译:在这里,我们介绍了格陵兰岛东南部Mittivakkat Gletscher的探地雷达测量值,以估算单个冰川的经验体积-面积比例关系。在1994年和2012年的一次直接体积调查之间,冰川体积从2.02 km(3)减少到1.44 km(3),而研究区域从17.6 km(2)减少到15.8 km(2)。这些结果与在Mittivakkat Gletscher进行的长期质量平衡测量(1995 / 96-2011 / 12)观察到的累积质量损失一致,并证实该冰川处于严重的气候不平衡状态(AAR = 0.17)。观测到的缩放指数gamma = 3.14和系数c = 0.00025 km(3-2 gamma)不在全局缩放参数的范围内,但对较小的不确定性敏感。尽管如此,现有的全球体积-面积比例关系估计Mittivakkat Gletscher的体积分别在1994年和2011年的测量值的31%和15%之内。

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