Abstract

The upper part of the subsurface component of the Earth’s cryosphere—polygonal peatlands—are considered in this paper. The polygonal peatlands are widespread in the cryolithozone in northwestern Siberia. When the upper permafrost layer thaws under the influence of climatic fluctuations, the ice-bearing transition and intermediate layers in the polygonal peatlands serve as a buffer zone. Therefore, the identification of these layers is a crucial task. The specific features of the layers, their relationship with ice of various origins, and the properties of peat have been determined. The differences in the structure of the intermediate layer, associated with polygonal microrelief of the surface, have been revealed. Thawing of the transitional layer against the background of modern warming has been recorded on the basis of monitoring of a seasonally thawed layer. To identify the transitional and intermediate layers, the indicators—the cryogenic structure, degree of preservation, color, water content, and density of peat—have been determined.

中文翻译：

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西伯利亚西北部多边形泥炭地过渡层和中间层的识别特征

摘要

本文考虑了地球冰冻圈地下部分的上部——多边形泥炭地。多边形泥炭地广泛分布于西伯利亚西北部的冰冻带。当上部多年冻土层在气候波动的影响下解冻时，多边形泥炭地中的含冰过渡层和中间层充当缓冲区。因此，识别这些层是一项至关重要的任务。这些层的具体特征、它们与各种来源的冰的关系以及泥炭的特性已经确定。与表面的多边形微浮雕相关的中间层结构的差异已被揭示。在监测季节性融化层的基础上，记录了现代变暖背景下过渡层的融化。为了识别过渡层和中间层，已经确定了泥炭的低温结构、保存程度、颜色、含水量和密度等指标。