Abstract
The 14C contents of organic carbon (δ 14C) were measured in sinking particles collected by year-long time-series sediment trap systems moored at four different depths on the deepest axis of the Japan Trench. The annual mean δ 14C values in sinking particles decreased with depth consistently, from +39‰ at 1171 m to −39‰ at 8681 m, while there were also some seasonal changes in δ 14C of sinking particles at each depth. Because the δ 14C value of sinking particulate organic carbon (POC) originated from surface water cannot change significantly during its settling process in deep water column due to its relatively long half life (5720 yrs), this nearly 80‰ downward decrease in δ 14C value inevitably indicated that some “old” carbon is entrained into sinking particles in the deep water column. Considering that the δ 14C values of sinking POC in the central regions of oceans do not show such large vertical changes, this “old” carbon must come from surface sediments on the continental slope area, adjacent of the trap site, through resuspension of sedimentary particles. The δ 14C value of sinking POC at each trap depth was compared with the δ 14C values of surface sediments and the hypothesized δ 14C values of sinking POC exported from surface water, in order to calculate the proportion of the resuspended sediment fraction in each sinking POC sample. While the results showed that 24–56% of sinking organic carbon at 8681 m depth may come from the surface sediment beneath the trench, this flux of resuspended “old” surface sediment could not solely explain the increase in sinking POC flux near bottom of water. Consequently, it is also suggested that there is not only the resuspension of “old” sedimentary particles but also the “rebound” of fresh sinking particles on the bottom which induces the anomalous increase in sinking particle flux near sediment surface.
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References
Alldredge, A. L., C. Gotschalk, U. Passow and U. Riebesell (1995): Mass aggregation of diatom blooms: Insights from a mesocosm study. Deep-Sea Res. 42, 9–27.
Anderson, R. F., G. T. Rowe, P. F. Kemp, S. Trumbore and P. E. Biscaye (1994): Carbon budget for the mid-slope depocenter of the Middle Atlantic Bight. Deep-Sea Res. II, 41, 669–703.
Banse, K. (1990): New views on the degradation and disposition of organic particles as collected by sediment traps in the open sea. Deep-Sea Res., 37, 1177–1195.
Berger, W. H., V. S. Smetacek and G. Wefer (1989): Ocean productivity and paleoproductivityan overview. pp. 1–34. In Productivity of the Ocean: Present and Past, ed. by W. H. Berger, V. S. Smetacek and G. Wefer, John Wiley and Sons, Chichester.
Billet, D. S. M., R. S. Lampitt, A. L. Rice and R. F. C. Mantoura (1983): Seasonal sedimentation of phytoplankton to the deep-sea benthos. Nature, 302, 520–522.
Biscaye, P. E., R. F. Anderson and R. L. Deck (1988): Fluxes of particles and constituents to the eastern United States continental slope and rise: SEEP-1. Cont. Shelf Res., 8, 885–904.
Broecker, W. S. and T.-H. Peng (1980): Seasonal variability in the 14C/12C ratio for surface ocean water. Geophys. Res. Lett., 7, 1020–1022.
Druffel, E. R. M., P. M. Williams, J. E. Bauer and J. R. Ertel (1992): Cycling of dissolved and particulate organic matter in the open ocean. J. Geophys. Res., 97, 639–659
Gardner, W. D. (1980): Sediment trap dynamics and calibration: a laboratory evaluation. J. Mar. Res., 38, 17–39.
Honjo, S. (1982): Seasonality and interaction of biogenic and lithogenic particulate flux at the Panama Basin. Science, 218, 883–884.
Honjo, S., D. W. Spencer and J. W. Farrington (1982): Deep advective transport of lithogenic particles in the Panama Basin. Science, 216, 516–518.
Hosokawa, A. (1996): Characteristics of material transport system in coastal regions. Master Thesis, Nagoya University, Japan (in Japanese).
Kitagawa, H., T. Masuzawa, T. Nakamura and E. Matsumoto (1993): A batch preparation method of graphite targets with low background for AMS 14C measurements. Radiocarbon, 35, 295–300.
Lampitt, R. S. (1985): Evidence for the seasonal deposition of detritus to deep-sea floor and its subsequent resuspension. Deep-Sea Res., 22, 885–897.
Minagawa, M., D. A. Winter and 1. R. Kaplan (1984): Comparison of Kjeldahl and combustion methods for measurement of nitrogen isotope ratios in organic matter. Anal. Chem., 56, 1859–1861.
Nakamura, T., N. Nakai and S. Ohishi (1987): Techniques of tandem accelerator mass spectrometry and their applications to 14C measurement. Nuc. Inst. Meth. Phys. Res., B29, 335–360.
Nakatsuka, T., N. Handa, E. Wada and C.-S. Wong (1992): The dynamic changes of stable isotopic ratios of carbon and nitrogen in suspended and sedimented particulate organic matter during a phytoplankton bloom. J. Mar. Res., 50, 267–296.
Nakatsuka, T., N. Handa, N. Harada, T. Sugimoto and S. Imaizumi (1997): Origin and decomposition of sinking particulate organic matter in the deep water column inferred from the vertical distributions of its 3N, 6C and 6C. Deep-Sea Res. 44, 1957–1979.
Noriki, S. and S. Tsunogai (1986): Particulate fluxes and major components of settling particles from sediment trap experiments in the Pacific Ocean. Deep-Sea Res., 33, 903–912.
Ostlund, H. G., H. Craig, W. S. Broecker and D. Spencer (1987): GEOSECS Atlantic, Pacific and Indian Ocean Expeditions Vol. 7, Shorebased Data and Graphics. National Science Foundation, Washington, D.C., 200 pp.
Stuiver, M. and H. A. Polach (1977): Discussion reporting of 14C data. Radiocarbon, 19, 355–363.
Tanoue, E. and N. Handa (1979): Differential sorption of organic matter by various sized sediment particles in recent sediment from the Bering Sea. J. Oceanogr. Soc. Japan, 35, 199–208.
Toggweiler, J. R., K. Dixon and K. Bryan (1989): Simulations of radiocarbon in a coarse-resolution world ocean model 2. Distributions of bomb-produced carbon 14. J. Geophys. Res., 94, 8243–8264.
Wada, E., M. Terasaki, Y. Kabaya and T. Nemoto (1987): N and C abundances in the Antarctic Ocean with emphasis on the biogeochemical structure of the food web. Deep-Sea Res., 34, 829–841.
Walsh, L, J. Dymond and R. Collier (1988a): Rates of recycling of biogenic components of settling particles in the ocean derived from sediment trap experiments. Deep-Sea Res., 35, 43–58.
Walsh, 1., K. Fischer, D. Murray and J. Dymond (1988b): Evidence for resuspension of rebound particles from near-bottom sediment traps. Deep-Sea Res., 35, 59–70.
Walsh, J. J., D. A. Dieterle and J. R. Pribble (1991): Organic debris on the continental margins: a simulation analysis of source and fate. Deep-Sea Res., 38, 805–828.
Williams, P. M. and E. R. M. Druffel (1987): Radiocarbon in dissolved organic matter in the Central North Pacific Ocean. Nature, 330, 246–248.
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Nakatsuka, T., Hosokawa, A., Handa, N., Matsumoto, E., Masuzawa, T. (2000). 14C Budget of Sinking Particulate Organic Matter in the Japan Trench: A New Approach to Estimate the Contribution from Resuspended Particles in Deep Water Column. In: Handa, N., Tanoue, E., Hama, T. (eds) Dynamics and Characterization of Marine Organic Matter. Ocean Sciences Research (OSR), vol 2. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-1319-1_8
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DOI: https://doi.org/10.1007/978-94-017-1319-1_8
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