| 引用本文: | 卢锡,胡石建,王凡,胡敦欣,刘海龙,刁新源,于仁成.基于漂流浮标观测分析日本福岛以东表层海洋物质的散播轨迹.海洋与湖沼,2022,53(5):1027-1044. |
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| 基于漂流浮标观测分析日本福岛以东表层海洋物质的散播轨迹 |
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卢锡1,2,3, 胡石建1,2,3,4, 王凡1,2,3,4, 胡敦欣1,2,3,4, 刘海龙5, 刁新源1,2,3,4, 于仁成1,2,3,4
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1.中国科学院海洋研究所 海洋环流与波动重点实验室 山东青岛 266071;2.中国科学院海洋大科学研究中心 山东青岛 266071;3.中国科学院大学 北京 100049;4.青岛海洋科学与技术试点国家实验室 山东青岛 266237;5.中国科学院大气物理研究所 大气科学和地球流体力学数值模拟国家重点实验室 北京 100029中国科学院大学 北京 100049
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| 摘要: |
| 认识海洋中的物质如何散播对于理解海洋环境变化和人类活动污染在海洋中的扩散过程具有非常重要的意义。利用历史海表漂流浮标观测数据,对日本福岛以东海域的表层物质散播轨迹进行了拉格朗日示踪分析和观测模拟试验研究。结果发现,福岛以东海域海表浮标的散播路径主要分为东、南两支,其中速度较快的东支为主要通道,沿黑潮延伸体汇入北太平洋流,最短用时大约22个月即可到达北美西海岸;南支则沿黑潮延伸体以南的大范围南向流向西南方向运移,速度较慢且明显受涡旋活动影响,最快大约5个月即可到达吕宋海峡和中国台湾以东海域,进而进入南海和东海等中国近海海域。通过开展观测模拟试验,发现海表浮标散播的概率密度分布呈现以福岛附近海域为核心、向西南和正东方向递减扩展的形态,其中,到达中国近海的浮标主要通过吕宋海峡进入。文章详细讨论了研究结果的局限性、不足之处,以及因基于大量现场观测而具备的重要参考价值。 |
| 关键词: 福岛 核污染 西太平洋 扩散轨迹 漂流浮标 |
| DOI：10.11693/hyhz20211100292 |
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| 基金项目:中国科学院重点部署项目,ZDBS-SSW-DQC002号;中国科学院战略性先导科技专项项目,XDB42010403号;国家自然科学基金项目,42022040号;山东省自然科学基金资助项目,ZR2020JQ18号;中国科学院创新交叉团队项目,JCTD-2020-12号;中国科学院青年创新促进会会员项目,2018240号。 |
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| ANALYSIS OF SPREADING TRAJECTORY OF SURFACE OCEAN MATERIALS FROM EAST OF FUKUSHIMA OF JAPAN BASED ON DRIFTING BUOY OBSERVATIONS |
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LU Xi1,2,3, HU Shi-Jian1,2,3,4, WANG Fan1,2,3,4, HU Dun-Xin1,2,3,4, LIU Hai-Long5, DIAO Xin-Yuan1,2,3,4, YU Ren-Cheng1,2,3,4
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1.CAS Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Qingdao 266071, China;2.Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China;3.University of Chinese Academy of Sciences, Beijing 100049, China;4.Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China;5.State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Chinese Academy of Sciences Institute of Atmospheric Physics, Beijing 100029, ChinaUniversity of Chinese Academy of Sciences, Beijing 100049, China
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| Abstract: |
| Knowing how materials disperse at the ocean surface is very important for understanding the process of marine environmental change and anthropogenic pollution diffusion in the ocean.Lagrangian trajectory analysis and observation-based simulation experiments were performed to examine the spreading trajectory of surface materials from the east of Fukushima of Japan using historical sea surface drifting buoys observation data.The surface spreading path of drifting buoys originated from east of Fukushima could be divided into mainly two branches:eastern and southern ones.The eastern branch is the main channel in higher speed and merges into the North Pacific Current along the Kuroshio extension,with an earliest arrival to North America in about 22 months.The southern branch in lower speed migrates to the southwest along a widespread southward currents south of the Kuroshio extension,and are obviously affected by eddy activities.The southern branch reaches the Luzon Strait and east of Taiwan in about 5 months at the earliest,and then enters the South China Sea and the East China Sea.The probability density distribution of surface drifting buoys in simulation experiments based on observation spreads with the Fukushima vicinity as the core,and gradually expands to the southwest and east.The drifting buoys arriving in coastal China are mainly originated from the Luzon Strait.Confined to the specialties of drifting buoy observations,the conclusions have certain limitations from omitting processes such as mixing,diffusion,and biogeochemistry.However,the conclusions based on observation are of great importance for reference. |
| Key words: Fukushima nuclear pollution western Pacifica Ocean diffusion tracks drifting buoy |
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