The validity of any glaciological paleo proxy used to interpret climate records is based on the level of understanding of their transfer from the atmosphere into the ice sheet and their recording in the snowpack. Large spatial noise in snow properties is observed, as the wind constantly redistributes the deposited snow at the surface routed by the local topography. To increase the signal-to-noise ratio and getting a representative estimate of snow properties with respect to the high spatial variability, a large number of snow profiles is needed. However, the classical way of obtaining profiles via snow-pits is time and energy-consuming, and thus unfavourable for large surface sampling programs. In response, we present a dual-tube technique to sample the upper metre of the snowpack at a variable depth resolution with high efficiency. The developed device is robust and avoids contact with the samples by exhibiting two tubes attached alongside each other in order to (1) contain the snow core sample and (2) to access the bottom of the sample, respectively. We demonstrate the performance of the technique through two case studies in East Antarctica where we analysed the variability of water isotopes at a 100 m and 5 km spatial scales.

中文翻译：

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用于积雪研究的双管采样技术

任何用于解释气候记录的冰川古代用物的有效性都基于对它们从大气转移到冰盖以及它们在积雪中的记录的理解程度。观察到雪属性中的大空间噪声，因为风不断地重新分布由当地地形路由的表面上的沉积雪。为了提高信噪比并获得关于高空间可变性的雪特性的代表性估计，需要大量的雪剖面。然而，通过雪坑获取剖面的经典方法既耗时又耗能，因此不利于大型表面采样程序。作为回应，我们提出了一种双管技术，以高效的可变深度分辨率对积雪的上部米进行采样。开发的装置坚固耐用，通过展示两个相互连接的管子来避免与样品接触，以便 (1) 包含雪芯样品和 (2) 分别进入样品的底部。我们通过在东南极洲的两个案例研究展示了该技术的性能，我们分析了 100 m 和 5 km 空间尺度上水同位素的变异性。