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首页> 外文期刊>Eurasian Soil Science >Temperature regimes of northern taiga soils in the isolated permafrost zone of Western Siberia
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Temperature regimes of northern taiga soils in the isolated permafrost zone of Western Siberia

机译：西伯利亚西部多年冻土带北部针叶林土壤温度状况

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Soil temperature regimes were studied in three ecosystems of the north of Western Siberia in the zone of isolated permafrost: the forest ecosystem with gleyic loamy sandy podzol (Stagnic Albic Podzol), the flat-topped peat mound ecosystem with humus-impregnated loamy sandy to light loamy peat cryozem (Histic Oxyaquic Turbic Cryosol (Arenic)), and the peat mound (palsa) ecosystem with oligotrophic destructive permafrost-affected peat soil (Cryic Histosol). Annual temperature measurements in the soil profiles demonstrated that these soils function under different temperature regimes: very cold permafrost regime and cold nonpermafrost regime. The following annual temperature characteristics proved to be informative for the studied soils: sums of above-zero temperatures at the depths of 10 and 20 cm, the maximum depth of penetration of temperatures above 10A degrees C, and the number of days with daily soil temperatures above (or below) 0A degrees C at the depth of 20 cm. On the studied territory, the insulating effect of the snow cover in winter was at least two times more pronounced than the insulating effect of the vegetation cover in summer. Cryogenic soils of the studied region are characterized by the high buffering towards changing climatic parameters. This is explained by the presence of the litter and peat horizons with a very low thermal diffusivity and by the presence of permafrost at a relatively shallow depth with temperature gradients preventing penetration of heat to the permafrost table.
机译：在西伯利亚西部北部的孤立多年冻土带的三个生态系统中研究了土壤温度状况：带有斜纹壤质沙质Podzol（Stagnic Albic Podzol）的森林生态系统，腐殖质浸透的质壤土砂质轻沙丘生态系统壤土泥炭低温（Histic Oxyaquic Turbic冻土（Arenic））和泥土丘陵（palsa）生态系统，其土壤贫化并破坏了多年冻土，泥炭土（Cryic Histosol）。每年在土壤剖面中进行的温度测量表明，这些土壤在不同的温度范围内起作用：非常冷的多年冻土层和寒冷的非多年冻土层。下列年度温度特征证明对所研究的土壤具有参考价值：10和20 cm深度处零温度以上的总和，10A摄氏度以上温度的最大渗透深度以及每日土壤温度的天数在20厘米深度处高于（或低于）0A摄氏度。在研究区域内，冬季积雪的隔热效果至少是夏季植被的隔热效果的两倍。研究区域的低温土壤具有对变化的气候参数的高缓冲作用。这是由于存在的杂物层和泥炭层具有很低的热扩散率，以及由于在相对较浅的深度存在永久冻土和温度梯度而阻止了热量渗透到永久冻土台上。

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