海洋科学2025，Vol.49Issue(9)：20-27,8.DOI:10.11759/hykx20250320001
楚科奇海-白令海-北太平洋表层海水中放射性铯分布特征及关联
Radioactive-Cesium distribution characteristics and inter-connections in surface seawater of the Chukchi Sea,Bering Sea,and North Pacific Ocean
摘要
Abstract
In this study,the distribution characteristics and transport paths of cesium-137(137Cs)in the Chukchi Sea,Bering Sea,and North Pacific Ocean were analyzed by combining the activity data from surface water collected during China's 10th Arctic scientific expedition with regional hydrological characteristics.Our findings indicate that 137Cs exhibited a low activity concentration in the Chukchi Sea(0.20-0.49 Bq·m-³),indicating that it was only minimally affected by water inflow from the Bering Sea.In the Bering Sea,the activity concentration of 137Cs was unevenly distributed(0.41-1.08 Bq·m-3).Additionally,a high-value area was observed in the southern part of the western basin,which was attributed to the migration of low-temperature,high-salinity subsurface water resulting from the winter subsidence of the Aleutian North Slope current.It was also observed that a high-value area in the eastern continental shelf was affected by the inflow of the continental shelf current.In the North Pacific Ocean,the 137Cs activity concentration exhibited a patchy distribution(0.27-1.21 Bq·m-³),with a distinct low-value area that confirmed the barrier effect of the Subarctic Current on pollutants.The absence of a significant difference in the distribution of 137Cs activity concentration in the Bering Sea and North Pacific Ocean indicated that the 137Cs-traced radioactive materials were transported and dispersed by ocean currents,leading to a homogenization trend across a wide range of oceans and marginal seas.Overall,this study provides a scientific basis for assessing the migration of nuclear pollutants toward the Arctic.关键词
137Cs/北太平洋/白令海/楚科奇海/分布Key words
137Cs/North Pacific Ocean/Bering Sea/Chukchi Sea/distribution分类
海洋科学引用本文复制引用
石红旗,陈发荣..楚科奇海-白令海-北太平洋表层海水中放射性铯分布特征及关联[J].海洋科学,2025,49(9):20-27,8.基金项目
山东省重大科技创新工程(2021CXGC010705)Major Science and Technology Innovation Project of Shandong Province,No.2021CXGC010705 （2021CXGC010705）
