Identification of permafrost zones using selected permafrost landforms
Identification of permafrost zones using selected permafrost landforms
复制标题
使用选定的多年冻土地貌识别多年冻土区
DOI：
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发表时间：
1982
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影响因子：
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通讯作者：
S. Harris
中科院分区：
文献类型：
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作者：
S. Harris
本文探讨了利用地带性多年冻土地貌分布来辅助绘制多年冻土分布图的可能性。在冬季积雪小于50厘米的地区，可以通过冻结和融化指数来划分多年冻土区。这种关系适用于挪威、斯皮茨卑尔根、加拿大和蒙古。由于这些地貌包括广泛的热环境，因此有可能追踪各种冰缘地貌的热范围。连续多年冻土带明显违反年平均气温等温线，并以矿物土壤中全新世费森梅尔多边形区和冰楔多边形区为界。泥炭、土丘和水泥土丘中的活动冰楔、未分类的多边形和开放系统的拼接延伸到不连续的永久冻土区。排序的多边形和闭合系统PINGO延伸得更远。在挪威和库贝克，帕尔萨斯、泥炭高原和冰洞从连续的永久冻土区延伸到零星的永久冻土区。
This paper examines the possibility of using the distribution of zonal permafrost landforms to aid in mapping permafrost distributions. In areas with under 50 cm snow cover in winter, permafrost zones can be defined by freezing and thawing indices. The relationship works for Norway, Spitzbergen, Canada, and Mongolia. Since these include a wide range of thermal environments, it is possible to trace the thermal ranges of various periglacial landforms. The zone of continuous permafrost markedly transgresses mean annual air temperature isotherms and is delimited by areas of Holocene felsenmeer and ice-wedge polygons in mineral soils. Active ice wedges in peats, earth hummocks, and cementery mounds, non-sorted polygons, and open system pingos extend into the zone of discontinuous permafrost. Sorted polygons and closed system pingos extend even further. Palsas, peat plateaux, and ice caves extend from the zone of continuous permafrost into that of sporadic permafrost in Norway and QuCbec.