Abstract

Long-term observation data (2003–2018) of 625 stations were analyzed to determine the distribution of organochlorine pesticides (DDT, hexachlorobenzene, and hexachlorocyclohexane) and polychlorbiphenyls in bottom sediments of the Barents Sea. The concentrations of pollutants were analyzed for the sea as a whole and separately for six chosen regions: Spitsbergen shelf, Medvezhinskii trough, Northeastern Region, Southeastern Region (the Pechora Sea), the Central Basin, and Kola Bay region. The data were processed with the use of methods of mathematical statistics and GIS-analysis in the ArcView environment (ESRI). Maps of the concentration distributions of the examined pollutants are given. The most polluted were sediments in the central depression and Kola Bay area (including Western Murman), and the least polluted were those in the Southeastern region. The central depression was found to be the main region of pollution deposition in the Barents Sea. A considerable portion of pesticides and PCBs is likely to be the accumulated old pollution that enters the sea because of melting of firn and perennial ice in the Arctic.

中文翻译：

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巴伦支海底沉积物中的持久性有机污染物

摘要

分析了625个站的长期观测数据（2003-2018年），以确定巴伦支海底沉积物中有机氯农药（DDT，六氯苯和六氯环己烷）和多氯联苯的分布。分析了整个海洋的污染物浓度，并对六个选定区域分别进行了分析：斯匹次卑尔根大陆架，梅德韦任斯基槽，东北地区，东南地区（佩乔拉海），中部盆地和可乐湾地区。在ArcView环境（ESRI）中使用数学统计和GIS分析方法对数据进行了处理。给出了所检查污染物的浓度分布图。污染最严重的是中部凹陷和科拉湾地区（包括西摩尔曼）的沉积物，污染最小的是东南地区的那些。发现中央凹陷是巴伦支海污染沉积的主要区域。农药和多氯联苯的很大一部分可能是累积的旧污染物进入北极，这是由于北极地区的烧成和多年生冰融化所致。