Analysis of deep‐penetrating radar surveys of West Antarctica, US‐ITASE 2001
Analysis of deep‐penetrating radar surveys of West Antarctica, US‐ITASE 2001
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西南极洲深部穿透雷达调查分析，US-ITASE 2001
DOI：
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发表时间：
2003
期刊：
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通讯作者：
R. Jacobel
中科院分区：
文献类型：
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作者：
B. Welch;R. Jacobel
我们收集了1850公里的陆基无线电回波探测（RES）数据，在西南极洲沿着2001年国际跨南极科学考察导线（US-ITASE）的美国腿。这些数据代表了该地区部分地区冰厚度和内部地层的第一次高分辨率测量，这些测量结果与西南极冰盖（WAIS）的稳定性有关。内部层描绘等时线已被连续跟踪的大部分的配置文件的长度和日期从伯德深芯归因于这些等时线之一，我们估计垂直速度穿越路线。我们的冰厚度测量与BEDMAP的比较表明，在数据库受到数据覆盖范围的限制的地区，有很好的一致性。在BEDMAP数据集被迫插值的地方，差异高达冰厚度的45%。
We collected 1850 km of ground‐based radio echo‐sounding (RES) data in West Antarctica along the 2001 US leg of the International Trans‐Antarctic Scientific Expedition traverse (US‐ITASE). These data represent the first high‐resolution measurements of ice thickness and internal stratigraphy for portions of this area that bear on questions about the stability of the West Antarctic Ice Sheet (WAIS). Internal layers depicting isochrones have been traced continuously for much of the profile length and a date from the Byrd Deep Core is ascribed to one of these isochrones from which we estimate vertical velocities across the traverse route. Comparison of our ice thickness measurements with BEDMAP show good agreement in regions where the database is well constrained by data coverage. Where the BEDMAP dataset was forced to interpolate, differences are as high as 45% of the ice thickness.