2011年3月日本福岛核电站核泄漏在海洋中的传输.pdf
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1、2011 年 3 月日本福岛核电站核泄漏在海洋中的传输 何晏春;郜永祺;王会军;JOHANNESSEN M Ola;于雷【期刊名称】海洋学报(中文版)【年(卷),期】2012(034)004【摘 要】The massive nuclear leakage into ocean from Fukushima Nuclear Power Plant was observed on March 25th,2011.The transport of leaked radioactive pollutant from the Fukushima Nuclear Power Plant was simul
2、ated using a global version of Miami Isopycnic Coordinate Ocean Model(MICOM).The simulation was performed by assuming constant and continuous leakage for 20 days(scenario 1)and for one year(scenario 2)starting from March 25th,2011 and was integrated for 20 years.Taking into account of the annual and
3、 inter梐 nnul variability of the ocean circulation,the model for each scenario was forced with four different time periods of NCEP/NCAR daily atmospheric forcing,namely,repeated 2010,1991-2011,1971-1991 and 1951-1971.There is no remarkable difference of transport pathways(both on surface and subsurfa
4、ce layers)transport timescales and vertical penetration for the nuclear waste among different ensemble members.An ensemble mean for each scenario was obtained in order to reduce the uncertainty in the simulations.The results of the ensembles indicate that the nuclear pollutant for both scenarios tra
5、nsports eastward to eastern Pacific and thereafter follows a southwest pathway towards the western Pacific.It takes about 10 to 15 years to reach the coast of East Asia.The transport pathway is governed by the o-cean current system of the North Pacific Subtropical Gyre.The transport at the subsurfac
6、e(100-400 m depth)is about 5 years faster than that at the surface when the nuclear signal reaches the coast of the East Asia.The time evolution of maximum tracer concentration shows that the surface and subsurface maximum concentrations of leaked nuclear pollutant at the end of the simulation are o
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- 2011 日本 核电站 泄漏 海洋 中的 传输
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