Ice Volume Estimates from Ground-Penetrating Radar Surveys, Wedel Jarlsberg Land Glaciers, Svalbard
Ice Volume Estimates from Ground-Penetrating Radar Surveys, Wedel Jarlsberg Land Glaciers, Svalbard
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斯瓦尔巴群岛韦德尔贾尔斯贝格陆地冰川探地雷达测量的冰量估算
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发表时间：
2014
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通讯作者：
D. Puczko
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作者：
F. Navarro;A. Martín‐Español;J. Lapazaran;M. Grabiec;J. Otero;E. Vasilenko;D. Puczko
翻译后摘要我们提出了基于探地雷达（GPR）的体积计算，与相关的误差估计，八个冰川的韦德尔Jarlsberg土地，西南斯匹次卑尔根群岛，斯瓦尔巴群岛，并将它们与体积面积缩放关系。这些体积估计是基于2004-2013年期间收集的探地雷达冰厚数据。总面积和体积分别为502.91 ± 18.60 km 2和91.91 ± 3.12 km 3。个别面积、体积和平均冰厚分别在0.37-140.99 km 2、0.01-31.98 km 3和28-227 m之间，在Austre Torelbreen记录的最大冰厚为619 ± 13 m。为了估计未经调查的支流冰川的冰量，我们结合联合收割机多项式横截面的函数提供最佳拟合的测量冰厚度沿着收集的22个调查支流的中心线。对于探地雷达数据的时间到深度的转换，我们测试使用冰川范围内的恒定无线电波速度选择的基础上，当地或区域的共同中点测量，与使用不同的速度的积雪，冷冰，温带冰层，得出的结论是，相应的体积计算同意彼此在其误差范围内。
Abstract We present ground-penetrating radar (GPR)—based volume calculations, with associated error estimates, for eight glaciers on Wedel Jarlsberg Land, southwestern Spitsbergen, Svalbard, and compare them with those obtained from volume-area scaling relationships. The volume estimates are based upon GPR ice-thickness data collected during the period 2004–2013. The total area and volume of the ensemble are 502.91 ± 18.60 km2 and 91.91 ± 3.12 km3, respectively. The individual areas, volumes, and average ice thickness lie within 0.37–140.99 km2, 0.01–31.98 km3, and 28–227 m, respectively, with a maximum recorded ice thickness of 619 ± 13 m on Austre Torellbreen. To estimate the ice volume of unsurveyed tributary glaciers, we combine polynomial cross-sections with a function providing the best fit to the measured ice thickness along the center line of a collection of 22 surveyed tributaries. For the time-to-depth conversion of GPR data, we test the use of a glacierwide constant radio-wave velocity chosen on the basis of local or regional common midpoint measurements, versus the use of distinct velocities for the firn, cold ice, and temperate ice layers, concluding that the corresponding volume calculations agree with each other within their error bounds.