The Arctic region is substantially a pristine area, but this unique part of the globe has also been contaminated by anthropogenic radioactive nuclides, and now there is still measurable activity of anthropogenic isotopes, even though more than 50 years have passed since the main source. Radionuclides in the Arctic, especially ⁹⁰Sr have seldom been studied despite their considerable environmental importance. This manuscript covers the results of ⁹⁰Sr and ¹³⁷Cs measurements in soil and lichen Cetrariella delisei collected from the Svalbard in 2012. In both lichen thalli and surface soils high activities of ⁹⁰Sr and ¹³⁷Cs were recorded and ranged between 3.69 and 28.1 Bq kg^{−1 90}Sr and 5.38–280.1 Bq kg^{−1 137}Cs in thalli and between 4.53 and 12.78 Bq kg⁻¹dw ⁹⁰Sr and 60.6–426.1 Bq kg⁻¹dw ¹³⁷Cs in surface soil layer. The activity of ⁹⁰Sr and ¹³⁷Cs in lichen thalli was influenced by distance from the glacier. This showed that during radionuclide biomonitoring of particular area with the use of lichens, it is important to take into account influence of environmental variability on radionuclides contents.

北极地区基本上是一个原始地区，但地球的这一独特区域也受到了人为放射性核素的污染，尽管自主要来源已经过去了50多年，但现在仍存在可测量的人为同位素活性。尽管北极对放射性核素，特别是⁹⁰ Sr，具有重要的环境意义，但很少进行研究。该手稿涵盖了2012年从斯瓦尔巴群岛采集的土壤和地衣中的Cetrariella delisei的⁹⁰ Sr和¹³⁷ Cs的测量结果。在地衣藻和表层土壤中均记录到⁹⁰ Sr和¹³⁷ Cs的高活度，范围介于3.69和28.1 Bq kg之间^{-1 90} Sr和5.38-280.1贝千克^{-1 137个}铯在菌体和4.53和BQ公斤之间12.78 ^-1 DW ⁹⁰ Sr和60.6-426.1千克贝^-1 DW ¹³⁷在土壤表层Cs中。距冰川的距离影响了地衣藻中⁹⁰ Sr和¹³⁷ Cs的活性。这表明在使用地衣对特定区域进行放射性核素生物监测期间，重要的是要考虑到环境变化对放射性核素含量的影响。