Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
권호 표지

Environmental Characteristics of Nutrients and Fluorescent Organic Hatters in the Northeast Pacific Ocean(KODOS)

북동태평양(KODOS 해역)의 영양염 및 형광 유기물에 관한 환경특성 연구

  • Published : 1997.12.01
Download PDF
⟨ Previous Next ⟩

Abstract

To investigate characteristics of biogeochemical environment of the Korea Deep Ocean Study(KODOSI area in the northeast Pacific Ocean, we preferentially measured Inorganic nutrients and fluorescent organic matters. Typically. the permanent thermocline was well developed at the depth of 200~1000m In the study area. Nitrate. phosphate and silicate were low In the surface mixed layer and Increased with depth. N/P and N/Si showed 15 and 0.2 respectively In the deeper layer. Two fluorophores, biomacromolecule(protein-like) and geomacromolecule (humid-like) , were observed by three dimensional fluorescence excltatlon/ emission spectra matrix. Biomacromolecule(maximum fluorescence at $Ex_{280m}/Em_{330nm}$) ranged from 41.9 to 147.0 TU with its maximum In the surface mixed layer and minimum in deeper water, This is a same trend that has been reported for DOC in the equatorial Pacific. This suggests that biomacromolecule might be labile and converted to refractory humic substance after bacterial degradation In the deeper layer. On the contrary, geomacromolecule(maximum fluorescence at $Ex_{330m}/Em_{430m}$), ranged from 7.6 to 46.5 QSU, showed minimum in the surface nixed layer(euphotic zone) Implying photodegradation and then increased with depth at all stations. In the characteristics of vertical profiles, the relationship between biomacromolecule and geomacromolecule showed negative correlation. Such trend can be attributed to biochemical regeneration or formation of fluorescent materials accompanying oxidation and rennnerallzation of settling organic matter.

Keywords

References

  1. Chemical Oceanography Oceanic and estuarine mixing processes Bowden, K. F.;J. P. Riley(ed);G. Skirrow(ed)
  2. Chemical Oceanography Broecker, W. S.
  3. Mar. Chem. v.37 The fluorescence of dissolved organic matter in seawater. Chen, R. F.;J. L. Bada
  4. Mar. Chem. v.45 The fluorescence of dissolved organic matter in porewaters of marine sediments. Chen, R. F.;J. L. Bada
  5. Nature v.332 no.31 Major role of bacteria in biogeochemical fluxes in the ocean's interior. Cho, B. C.;F. Azam
  6. Mar. Chem. v.51 Characterization of marine and terrestrial DOM in seawater using excitation-emission matrix spectroscopy. Coble, P. G.
  7. Mar. Chem. v.41 Fluorescence contouring analysis of DOC intercalibration experiment samples:a comparison of techniques. Coble, P. G.;C. A. Schultz;K. Mopper
  8. Mar. Chem. v.51 Biogeochemistry of organic matter in the Laurentian Trough, I. Composition and vertical fluxes of rapidly setting particles. Colombo, J. C.;N. Silverg;J. N. Gearing
  9. Mar. Chem. v.51 Biogeochemistry of organic matter in the Laurentian Trough, Ⅱ. Bulk composition of the sediments and relative reactivity of major components during early diagenesis. Colombo, J. C.;N. Silverg;J. N. Gearing
  10. Mar. Chem. v.47 Fluorescence spectroscopy of coastal and marine waters. De Souza Sierra, M. M.;O. F. X. Donard;M. Lamotte;C. Belin;M. Ewald
  11. Deep-Sea Res. v.41 no.4 Fluorescent matter in the eastern Atlantic Ocean. Part 1 :method of measurement and near-surface distribution. Determann, S.;R. Reuter;P.Wagner;R. Willkomm
  12. Mar. Chem. v.45 Comparison of August-September 1991 and 1979 surface partial pressure of$CO_2$ distribution in the equatorial Pacific Ocean near $150^ ？$W. Goyet, C.;E. T. Peltzer
  13. Mar. Chem. v.25 Vertical distribution of fluorescent organic matter in the north Pacific. Hayase, K.;H. Tsubota;I. Sunada;S. Goda;H. Yamazaki
  14. Mar. Chem. v.20 Behavior of natural fluorescences in Samagi Bay and Tokyo Bay, Japan-vertical and lateral distributions. Hayase, K.;M. Yamamoto;I. Nakazawa;H. Tsubota
  15. Mar. Chem. v.48 Vertical distribution of fluorescent organic matter along with AOU and nutrients in the equatorial central Pacific. Hayase, K.;N. Shinozuka
  16. Nature v.332 no.31 Downward flux of particulate organic matter in the ocean:a particle decomposition paradox. Karl, D. M.;G. A. Knauer;J. H. Martin
  17. Nature v.341 no.19 Photochemical source of biological substrates in sea water: implications for carbon cycling. Kieber, D. J.;J. McDaniel;K. Mopper
  18. Limnol. Oceanogr. v.35 no.7 Formation of carbonyl compounds from UV-induced photodegradation of humic substances in natural waters: Fate of riverine carbon in the sea. Kieber, R. J.;X. Zhou;K. Mopper
  19. Mar. Chem. v.11 Infuence of pH on the fluorescence of dissolved organic matter. Laane, R. W. P. M.
  20. Nature v.321 no.1 Molecular evidence for a terrestrial component of organic matter dissolved in ocean water. Meyers-Schulte, K. J.;J. I. Hedges
  21. Mar. Chem. v.41 Fluorescence as a possible tool for studying the nature and water column distribution of DOC components. Mopper, K.;C. A. Schultz
  22. Deep-Sea Res. v.42 no.2-3 A U.S. JGOFS process study in the equatoral Pacific(EqPac):Introduction. Murray, J. W.;E. Johnson;C. Garside
  23. J. Oceanol. Soc. Korea v.30 no.4 Characteristics of fluorescent organic matter and amino acids composition in the East Sea. Park, Y. C.;S. K. Son;K. H. Chung;K. H. Kim
  24. A manual of chemical and biological methods for seawater analysis. Parson, T. R.;Y. Maita;C. M. Lalli
  25. Geochemistry of marine humic compounds. Rashid, M. A.
  26. Mar. Chem. v.48 Anaylses of dissolved organic carbon in seawater:the JGOFS EqPac methods comparison. Sharp, J. H.;R. Benner;L. Bennett;C. A. Carlson;S. E. Fitzwater;E. T. Peltzer;L. M. Tupas
  27. Chemical Oceanography v.2 The micronutrient elements Spencer, C. P.;J. P. Riley(ed);G. Skirrow(ed)
  28. J. of Oceanography v.49 Distributional characteristics of DOC in the central equatorial Pacific. Tanoue, E.
  29. Mar. Chem. v.49 Dissolved organic carbon in the equatorial Atlantic Ocean. Thomas, C.;G. Cauwet;J-F. Minster
  30. Chemical Oceanography v.2 Biological and chemical aspects of dissolved organic material in sea water Williams, P. J. leB.;J. P. Riley(ed);G. Skirrow(ed)
  31. Nature v.330 no.19 Radiocarbon in the dissolved organic matter in the central north Pacific Ocean. Williams, P. M.;E. M. Druffel