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Dynamics and early post-tsunami evolution of floating marine debris near Fukushima Daiichi


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. High-spatial-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.

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Figure 1: Origin, structure and early motion of flotsam observed within the Fukushima Daiichi coastal zone following the 11 March 2011 tsunami.
Figure 2: Floating debris slows on entering calmer regions of low surface roughness then speeds partially recover as wind restructuring strengthens.
Figure 3: Debris rafts decay through both lateral and frontal material release within complex regimes influenced by currents, waves and restructured winds.


  1. 1

    Mitsuyasu, H. & Honda, T. in Wave Dynamics and Radio Probing of the Ocean Surface (eds Phillips, O. M. & Hasselmann, K.) 95–115 (Plenum, 1986).

    Book  Google Scholar 

  2. 2

    Charnotskii, M., Ermakov, S., Ostrovsky, L. & Schomina, O. Effect of film slicks on near-surface wind. Dynam. Atmos. Oceans 75, 118–128 (2016).

    Article  Google Scholar 

  3. 3

    Shomina, O., Ermakov, S., Kapustin, I. & Lazareva, T. Wind flow modulation due to variations of the water surface roughness. Geophys. Res. Abstr. 18, EGU2016-653 (2016).

    Google Scholar 

  4. 4

    Munk, W., Armi, L., Fischer, K. & Zachariasen, F. Spirals on the Sea. Proc. R. Soc. Lond. A 456, 1217–1280 (2000).

    Article  Google Scholar 

  5. 5

    Wurl, O., Wurl, E., Miller, L., Johnson, K. & Vagle, S. Formation and global distribution of sea-surface microlayers. Biogeosciences 8, 121–135 (2011).

    Article  Google Scholar 

  6. 6

    Welander, P. On the generation of wind streaks on the sea surface by the action of a surface film. Tellus 15, 67–71 (1963).

    Google Scholar 

  7. 7

    Barger, W. R., Garrett, W. D., Mollo-Christensen, E. L. & Ruggles, K. W. Effects of an artificial sea slick upon the atmosphere and ocean. J. Appl. Meteorol. 9, 396–400 (1970).

    Article  Google Scholar 

  8. 8

    Garrett, W. D. Damping of capillary waves of the air–sea interface by oceanic surface-active material. J. Mar. Res. 25, 279–291 (1967).

    Google Scholar 

  9. 9

    Hühnerfuss, H., Alpers, W., Garrett, W. D., Lange, P. A. & Stolte, S. Attenuation of capillary and gravity waves at sea by monomolecular organic surface films. J. Geophys. Res. 88, 9809–9816 (1983).

    Article  Google Scholar 

  10. 10

    Alpers, W. & Hühnerfuss, H. The damping of ocean waves by surface films: a new look at an old problem. J. Geophys. Res. 94, 6251–6265 (1989).

    Article  Google Scholar 

  11. 11

    Espedal, H. A., Johannessen, O. M. & Knulst, J. Satellite detection of natural films on the ocean surface. Geophys. Res. Lett. 23, 3151–3154 (1996).

    Article  Google Scholar 

  12. 12

    Jones, C. E., Minchew, B., Holt, B. & Hensley, S. in Monitoring and Modeling The Deepwater Horizon Oil Spill: A Record-Breaking Enterprise (eds Liu, Y., MacFadyen, A., Ji, Z.-G. & Weisberg, R. H.) 33–50 (American Geophysical Union, 2011).

    Book  Google Scholar 

  13. 13

    Zheng, Y., Bourassa, M. A. & Hughes, P. Influences of sea surface temperature gradients and surface roughness changes on the motion of surface oil: a simple idealized study. J. Appl. Meteorol. 52, 1561–1575 (2013).

    Article  Google Scholar 

  14. 14

    Peltzer, R. D., Griffin, O. M., Barger, W. R. & Kaiser, J. A. C. High-resolution measurement of surface-active film redistribution in ship wakes. J. Geophys. Res. 97, 5231–5252 (1992).

    Article  Google Scholar 

  15. 15

    Ochadlick, A. R. Jr, Cho, P. & Evans-Morgis, J. Synthetic aperture radar observations of currents colocated with slicks. J. Geophys. Res. 97, 5325–5330 (1992).

    Article  Google Scholar 

  16. 16

    Wood, D. H. Internal boundary layer growth following a step change in surface roughness. Bound.-Layer Meteorol. 22, 241–244 (1982).

    Article  Google Scholar 

  17. 17

    Iwasaki, A., Miyatani, S. & Nakasuka, S. Satellite contributions to disaster monitoring—Japanese Earthquake and Tsunami Case in 2011. In Proc. 26th Annual AIAA/USU Conference on Small Satellites SSC12-XII-1 (2012).

    Google Scholar 

  18. 18

    Arii, M., Koiwa, M. & Aoki, Y. Applicability of SAR to marine debris surveillance after the Great East Japan Earthquake. IEEE Trans. Geosci. Remote Sens. 5, 1729–1744 (2014).

    Google Scholar 

  19. 19

    Raby, A., Macabuag, J., Pomonis, A., Wilkinson, S. & Rossetto, T. Implications of the 2011 Great East Japan Tsunami on sea defence design. Int. J. Disaster Risk Reduct. 14, 332–346 (2015).

    Article  Google Scholar 

  20. 20

    Tohoku Tsunami Debris (NASA/GSFC/METI/ERSDAC/JAROS and U.S./Japan ASTER Science Team, 2011);

  21. 21

    Lebreton, L. C.-M. & Borrero, J. C. Modeling the transport and accumulation floating debris generated by the 11 March 2011 Tohoku tsunami. Mar. Poll. Bull. 66, 53–58 (2011).

    Article  Google Scholar 

  22. 22

    Miyazawa, Y. et al. Inverse estimation of source parameters of oceanic radioactivity dispersion models associated with the Fukushima accident. Biogeosciences 10, 2349–2363 (2013).

    Article  Google Scholar 

  23. 23

    A Report on Forecasts of Tsunami Driftage Location (Government of Japan, Ministry of the Environment, 2014);

  24. 24

    IPRC Tsunami Debris Models (eds Maximenko, N. & Hafner, J.) (International Pacific Research Center, 2012);

  25. 25

    Thorpe, S. A. Langmuir circulation. Ann. Rev. Fluid Mech. 36, 55–79 (2004).

    Article  Google Scholar 

  26. 26

    Chelton, D. B., Schlax, M. G., Freilich, M. H. & Milliff, R. F. Satellite measurements reveal persistent small-scale features in ocean winds. Science 303, 978–983 (2004).

    Article  Google Scholar 

  27. 27

    Small, R. J. et al. Air–sea interaction over ocean fronts and eddies. Dyn. Atmos. Oceans 45, 274–319 (2008).

    Article  Google Scholar 

  28. 28

    Etling, D. & Brown, R. A. Roll vortices in the planetary boundary layer: a review. Bound.-Layer Meteorol. 65, 215–218 (1993).

    Article  Google Scholar 

  29. 29

    Vandemark, D. et al. Measured changes in ocean surface roughness due to atmospheric boundary layer rolls. J. Geophys. Res. 106, 4639–4654 (2001).

    Article  Google Scholar 

  30. 30

    Cox, C. & Munk, W. Measurement of the roughness of the sea surface from photographs of the Sun’s glitter. J. Opt. Soc. Am. 44, 838–850 (1954).

    Article  Google Scholar 

  31. 31

    Matthews, J. P. Stereo observation of lakes and coastal zones using ASTER imagery. Remote Sens. Environ. 99, 16–30 (2005).

    Article  Google Scholar 

  32. 32

    Haimbach, S. P. & Wu, J. Directional slope distributions of wind-disturbed water surface. Radio Sci. 21, 73–79 (1986).

    Article  Google Scholar 

  33. 33

    Peake, W. H. & Oliver, T. L. The Response of Terrestrial Surfaces at Microwave Frequencies Technical Report AFAL-TR-70-301 (Ohio State University Department of Electrical Engineering, 1971);

Download references


The authors acknowledge support from Y. Ishikawa, T. Kitano, Y. Miyazawa and S. Varlamov. J.P.M. acknowledges research support from the Japan Society for the Promotion of Science (JSPS), Kakenhi grant no. 25610140 and wishes to express gratitude to the School of Ocean Sciences and the Library and Information Services of the University of Bangor, Wales.

Author information




J.P.M. conceived and led the project, analysed the satellite imagery, provided theoretical input and wrote the paper. L.O. developed theoretical models of the impact of horizontally varying surface roughness on near-surface wind velocity profiles. Y.Y. used the large eddy simulation (LES) technique to quantify debris-plume motions in the early post-tsunami phase. S.K. developed an LES-based laboratory-flow analogue of water motion around a floating debris raft to shed light on the process of lateral decay. H.T. derived realistic Stokes drift motion contributions based on an advanced third-generation wave model (WAVEWATCH III). All authors contributed to the analysis of the results and the development of the article.

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Correspondence to John Philip Matthews.

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The authors declare no competing financial interests.

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Matthews, J., Ostrovsky, L., Yoshikawa, Y. et al. Dynamics and early post-tsunami evolution of floating marine debris near Fukushima Daiichi. Nature Geosci 10, 598–603 (2017).

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