We examined the spatial variations in radiocesium (¹³⁴Cs and ¹³⁷Cs) and radium (²²⁶Ra and ²²⁸Ra) concentrations (activities) in and around the western Bering Sea in August 2018. ¹³⁴Cs concentrations in the surface seawater samples were 1.1–2.0 mBq/L, decay-corrected to the Fukushima Dai-ichi Nuclear Power Plant (FDNPP) accident date. The northward slope current-dominated water of the Bering Sea exhibited higher ¹³⁴Cs concentrations (345 Bq/m² of the column inventory at a site near the slope), along with higher ²²⁸Ra concentrations and lower salinities relative to the Aleutian Basin area in the western Bering Sea. The observed features were considered to be a consequence of the arrival of FDNPP-derived radiocesium-rich and lower salinity Alaskan Stream water from the Pacific Ocean side, and subsequent mixing of the ²²⁸Ra-rich shelf water in the eastern slope area of the Bering Sea.

我们于2018年8月检查了白令海西部及其周围地区放射性铯（¹³⁴ Cs和¹³⁷ Cs）和镭（²²⁶ Ra和²²⁸ Ra）的浓度（活性）的空间变化。地表海水样品中的¹³⁴ Cs浓度为1.1–2.0 mBq / L，根据福岛第一核电站事故日期进行衰减校正。白令海的北坡洋流占主导地位的水表现出较高的¹³⁴ Cs浓度（在靠近斜坡的位置处的柱存量为345 Bq / m ²），以及较高的²²⁸ Cs。相对于白令海西部阿留申盆地地区的镭浓度和较低盐度。观察到的特征被认为是源自FDNPP的富含放射性铯和较低盐度的阿拉斯加溪流水从太平洋一侧到达，以及随后在白令东坡地区混合了²²⁸ Ra丰富的陆架水的结果。海。