DOI: 10.1038/NGEO2975
论文题名: Dynamics and early post-tsunami evolution of floating marine debris near Fukushima Daiichi
作者: Matthews J.P. ; Ostrovsky L. ; Yoshikawa Y. ; Komori S. ; Tamura H.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2017
卷: 10, 期: 8 起始页码: 598
结束页码: 603
语种: 英语
Scopus关键词: airflow
; anthropogenic source
; earthquake event
; earthquake trigger
; global ocean
; Langmuir circulation
; nuclear power plant
; spatial resolution
; surface roughness
; tsunami event
; turbulent flow
; wave field
; Fukushima [Tohoku]
; Honshu
; Japan
; Tohoku
英文摘要: The devastating tsunami triggered by the Tōhoku-Oki earthquake of 11 March 2011 caused a crisis at the Fukushima Daiichi nuclear power station where it overtopped the seawall defences. On retreating, the tsunami carried loose debris and wreckage seaward and marshalled buoyant material into extensive plumes. Widespread concern over the fate of these and numerous other Tōhoku tsunami depositions prompted attempts to simulate debris dispersion throughout the wider Pacific. However, the effects of locally perturbed wind and wave fields, active Langmuir circulation and current-induced attrition determine a complex and poorly understood morphology for large floating agglomerations. Here we show that the early post-tsunami evolution of marine-debris plumes near Fukushima Daiichi was also shaped by near-surface wind modifications that took place above relatively calm (lower surface roughness)waters covered by surface films derived from oil and other contaminants. Highspatial- resolution satellite tracking reveals faster-than-expected floating-debris motions and invigorated plume evolution within these regions, while numerical modelling of turbulent air flow over the low-drag, film-covered surface predicts typically metre-per-second wind strengthening at centimetric heights, sufficient to explain the observed debris-speed increases.Wind restructuring probably stimulates the dispersion of flotsam from both biological and anthropogenic sources throughout a global ocean of highly variable surface roughness. © 2017 Macmillan Publishers Limited, part of Springer Nature. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/105734
Appears in Collections: 气候减缓与适应 科学计划与规划
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作者单位: Institute of Liberal Arts and Sciences, Kyoto University, Kyoto, Japan; University of Colorado, Boulder, CO, United States; University of North Carolina, Chapel Hill, NC, United States; Division of Earth and Planetary Sciences, Graduate School of Science, Kyoto University, Kyoto, Japan; Doshisha University, Research Centre for Highly-Functional Nanoparticles, Kyoto, Japan; Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokohama, Japan; Marine Information Group, Port and Airport Research Institute, 3-1-1 Nagase, Yokosuka, Japan
Recommended Citation:
Matthews J.P.,Ostrovsky L.,Yoshikawa Y.,et al. Dynamics and early post-tsunami evolution of floating marine debris near Fukushima Daiichi[J]. Nature Geoscience,2017-01-01,10(8)