Место издания:Laboratoire EDYTEM, CNRS, Université Savoie Mont-Blanc
Первая страница:861
Последняя страница:862
Аннотация:Areas of the southern Kola Peninsula where sporadic permafrost had been found back in the 1930s, were revisited in 2015 and 2017. It has been found that preservation of permafrost mainly depends on peat thickness: in large and thick peatlands where it exceeds 2 m, frozen peat is well preserved through the XX-beginning of XXI century. However, in palsa with smaller peat thickness, no permafrost was found, while traces of its former presence and degradation (polygons) are observed. The climatic conditions which allowed preservation of sporadic permafrost are mainly characterized with greater air temperature increase during the winter months, allowing frozen deposits to remain preserved. In summer, air temperature increase exists as well, however, it is smaller than during the cold season.