A study is made of the present-day levels of global 137Cs deposition in permafrost soils of the tundra and taiga zones of Yakutia. It is shown that the reserves of 137Cs in the soils of Yakutia vary over a significant range according to the landscape and climatic features of the territory. The largest amount of 137Cs is contained in soils of the mountain areas (Aldan Highlands and Ulakhan-Chistai Range) located in the zone with maximum average annual precipitation amount, and the smallest amount occurs in the soils of the tundra zone. It is found that the average density of soil pollution by 137Cs in the flat study areas of the territory of Yakutia has now decreased by a factor of 3 to 4 in general when compared with data of airborne gamma-ray spectrometric surveys conducted during 1968–1974 on the territory of the Yakut ASSR, due to its radioactive decay, burial, removal from the surface waters and accumulation by vegetation. It is shown that in the surveyed areas of the plains and mountains of Yakutia, the global deposition of 137Cs in soils is, on average, by a factor of 2–4 less than in the soils of Ural, Western and Southern Siberia and other territories of Russia. A correlation between the density of soil pollution by 137Cs and the atmospheric precipitation amount was revealed. The main regularities of 137Cs migration and redistribution were established in different types of soils of the areas of cryogenic landscapes associated by the runoff. In the harsh climatic conditions of Yakutia, vertical and lateral migration of 137Cs is weaker in frozen soils than in soils of the European part of Russia contaminated by radioactive cesium after the accident at the Chernobyl nuclear power plant.

中文翻译：

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铯 137 对雅库特领土的污染的地理特征

对雅库特苔原和针叶林区永久冻土中全球 137Cs 沉积的当今水平进行了研究。结果表明，雅库特土壤中 137C 的储量根据该领土的景观和气候特征而在很大范围内变化。137Cs在年均降水量最大的山区（阿尔丹高地和乌拉罕-奇斯泰山脉）土壤中含量最多，苔原带土壤中含量最少。研究发现，与 1968 年至 1974 年进行的航空伽马射线光谱测量数据相比，雅库特境内平坦研究区的 137Cs 土壤污染平均密度现已普遍下降了 3 至 4 倍。在雅库特 ASSR 的领土上，由于其放射性衰变、掩埋、从地表水中移除和植被积累。结果表明，在雅库特平原和山区调查区，137Cs在全球土壤中的沉积量平均比乌拉尔、西西伯利亚和南西伯利亚等地区的土壤少2-4倍俄罗斯的。揭示了 137Cs 的土壤污染密度与大气降水量之间的相关性。137Cs迁移和再分布的主要规律在与径流相关的低温景观区的不同类型土壤中建立。在雅库特恶劣的气候条件下，