Temporal trends in deep ocean Redfield ratios

Science

Volumn 287, Issue 5454, 2000, Pages 831-833

  Pahlow, Markus ^a   Riebesell, Ulf ^a  

^a ALFRED WEGENER INSTITUTE FOR POLAR AND MARINE RESEARCH   (Germany)

Author keywords

[No Author keywords available]

Indexed keywords

CARBON; NITROGEN; PHOSPHORUS;

BIOGEOCHEMICAL CYCLE; CARBON; DEEP SEA; NITROGEN; PARTICULATE FLUX; PHOSPHORUS; TEMPORAL VARIATION;

ARTICLE; ATMOSPHERE; CARBON DIOXIDE FIXATION; MARINE ENVIRONMENT; MINERALIZATION; PRIORITY JOURNAL; SEA;

ATLANTIC OCEAN; CARBON; NITROGEN; PACIFIC OCEAN; PHOSPHORUS; SEAWATER; TIME FACTORS;

EID: 0034603088     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.287.5454.831     Document Type: Article

References (45)

1. E. Sakshaug and O. Holm-Hansen, J. Exp. Mar. Biol. Ecol. 29, 1 (1977); G.-Y. Rhee, Limnol. Oceanogr. 23, 10 (1978); R. E. Hecky and P. Kitham, Limnol. Oceanogr. 33, 796 (1988); R. E. Mecky, P. Campbell, L. L. Hendzel, Limnol. Oceanogr. 38, 709 (1993); P. H. Doering, C. A. Oviatt, B. L. Nowicki, E. G. Klos, L. W. Reed, Mar. Ecol. Prog. Ser. 124, 271 (1995).
2. E. Sakshaug and O. Holm-Hansen, J. Exp. Mar. Biol. Ecol. 29, 1 (1977); G.-Y. Rhee, Limnol. Oceanogr. 23, 10 (1978); R. E. Hecky and P. Kitham, Limnol. Oceanogr. 33, 796 (1988); R. E. Mecky, P. Campbell, L. L. Hendzel, Limnol. Oceanogr. 38, 709 (1993); P. H. Doering, C. A. Oviatt, B. L. Nowicki, E. G. Klos, L. W. Reed, Mar. Ecol. Prog. Ser. 124, 271 (1995).
3. E. Sakshaug and O. Holm-Hansen, J. Exp. Mar. Biol. Ecol. 29, 1 (1977); G.-Y. Rhee, Limnol. Oceanogr. 23, 10 (1978); R. E. Hecky and P. Kitham, Limnol. Oceanogr. 33, 796 (1988); R. E. Mecky, P. Campbell, L. L. Hendzel, Limnol. Oceanogr. 38, 709 (1993); P. H. Doering, C. A. Oviatt, B. L. Nowicki, E. G. Klos, L. W. Reed, Mar. Ecol. Prog. Ser. 124, 271 (1995).
4. E. Sakshaug and O. Holm-Hansen, J. Exp. Mar. Biol. Ecol. 29, 1 (1977); G.-Y. Rhee, Limnol. Oceanogr. 23, 10 (1978); R. E. Hecky and P. Kitham, Limnol. Oceanogr. 33, 796 (1988); R. E. Mecky, P. Campbell, L. L. Hendzel, Limnol. Oceanogr. 38, 709 (1993); P. H. Doering, C. A. Oviatt, B. L. Nowicki, E. G. Klos, L. W. Reed, Mar. Ecol. Prog. Ser. 124, 271 (1995).
5. E. Sakshaug and O. Holm-Hansen, J. Exp. Mar. Biol. Ecol. 29, 1 (1977); G.-Y. Rhee, Limnol. Oceanogr. 23, 10 (1978); R. E. Hecky and P. Kitham, Limnol. Oceanogr. 33, 796 (1988); R. E. Mecky, P. Campbell, L. L. Hendzel, Limnol. Oceanogr. 38, 709 (1993); P. H. Doering, C. A. Oviatt, B. L. Nowicki, E. G. Klos, L. W. Reed, Mar. Ecol. Prog. Ser. 124, 271 (1995).
6. J. A. Logan, J. Geophys. Res. 88, 10,785 (1983).
7. R. A. Duce, in The Role of Air-Sea Exchange in Geochemical Cycling, P. Buat-Ménard, Ed. (Reidel, Dordrecht, Netherlands, 1986), pp. 497-529.
8. K. A. Fanning, Nature 339, 460 (1989).
9. G. Zhuang, R. A. Duce, D. R. Kester, J. Geophys. Res. 95, 16207 (1990).
10. R. A. Duce et al., Global Biogeochem. Cycles 5, 193 (1991).
11. A. J. Watson and M. Whitfield, Deep-Sea Res. 32, 1023 (1985); K. A. Fanning, J. Geophys. Res. 97, 5693 (1992).
12. A. J. Watson and M. Whitfield, Deep-Sea Res. 32, 1023 (1985); K. A. Fanning, J. Geophys. Res. 97, 5693 (1992).
13. W. S. Broecker, T. Takahashi, T. Takahashi, J. Geophys. Res. 90, 6925 (1985).
14. L. A. Anderson and J. L. Sarmiento, Global Biogeochem. Cycles 8, 65 (1994).
15. N. Gruber and J. L. Sarmiento, Global Biogeochem. Cycles 11, 235 (1997).
16. http://nemo.ucsd.edu/nemo-front.html; http:// www.dkrz.de/∼u241046/dataindex.html
17. W. S. Broecker and T. Takahashi, Deep-Sea Res. 27, 591 (1980).
18. 2) by 1.2 and 2 mol for each mole of increase in C and N, respectively (33, 34): (AOU:P) δ(AOU:P) = 1.2(C:P) δ(C:P) + 2(N:P) δ(N:P) ⇔ δ(C:P) = [(AOU:P) δ(AOU:P) -2(N:P) δ(N:P)]/[1.2(C:P)] and δ(C:N) = δ(C:P) - δ(N:P) where δ(N:P) = {[1 + δ(AOU:P)]/[1 + δ(AOU:N)]} - 1.
19. K. Grasshoff, Ed., Report on the Intercalibration Measurements at Leningrad 24-28 May 1966 and at Copenhagen September 1966 (International Council for the Exploration of the Sea, United Nations Educational, Scientific, and Cultural Organization, 1968).
20. S. W. Hager, E. L. Atlas, L. I. Gordon, A. W. Mantyla, P. K. Park, Limnol. Oceanogr. 17, 931 (1972).
21. 1 is the precision of a single measurement.
22. For each comparison, we collected AOU, S, and T data on the same density surface, within up to 5° latitude and longitude of the location, and calculated the regression of AOU versus S and AOU versus T. We then used these regressions to estimate the possible change in AOU due to the variations in S and T.
23. Adjusting the results for this potential change would increase the observed trends. Therefore, to ensure that the results remain conservative, we did not apply this adjustment.
24. S. Bacon, Nature 394, 871 (1998).
25. A. R. Longhurst, Limnol. Oceanogr. 36, 1507 (1991).
26. A. H. Knap, T. D. Jickells, A. Pszenny, J. Galloway, Nature 320, 158 (1986).
27. J. L. Sarmiento, G. Thiele, R. M. Key, W. S. Moore, J. Geophys. Res. 95, 18303 (1990).
28. A. Longhurst, S. Sathyendranath, T. Platt, C. Caverhill, J. Plankton Res. 17, 1245 (1995).
29. C. S. Yentsch, J. Phys. Oceanogr. 12, 717 (1990).
30. F. M. M. Morel, R. J. M. Hudson, N. M. Price, Limnol. Oceanogr. 36, 1742 (1991); J. H. Martin et al., Nature 371, 123 (1994); K. H. Coale, S. E. Fitzwater, R. M. Gordon, K. S. Johnson, R. T. Barber, Nature 379, 621 (1996); M. J. Behrenfeld and Z. S. Kolber, Science 283, 840 (1999).
31. F. M. M. Morel, R. J. M. Hudson, N. M. Price, Limnol. Oceanogr. 36, 1742 (1991); J. H. Martin et al., Nature 371, 123 (1994); K. H. Coale, S. E. Fitzwater, R. M. Gordon, K. S. Johnson, R. T. Barber, Nature 379, 621 (1996); M. J. Behrenfeld and Z. S. Kolber, Science 283, 840 (1999).
32. F. M. M. Morel, R. J. M. Hudson, N. M. Price, Limnol. Oceanogr. 36, 1742 (1991); J. H. Martin et al., Nature 371, 123 (1994); K. H. Coale, S. E. Fitzwater, R. M. Gordon, K. S. Johnson, R. T. Barber, Nature 379, 621 (1996); M. J. Behrenfeld and Z. S. Kolber, Science 283, 840 (1999).
33. F. M. M. Morel, R. J. M. Hudson, N. M. Price, Limnol. Oceanogr. 36, 1742 (1991); J. H. Martin et al., Nature 371, 123 (1994); K. H. Coale, S. E. Fitzwater, R. M. Gordon, K. S. Johnson, R. T. Barber, Nature 379, 621 (1996); M. J. Behrenfeld and Z. S. Kolber, Science 283, 840 (1999).
34. R. W. Young et al., Global Biogeochem. Cycles 5, 119 (1991).
35. Z. Zhu and T. Wang, Desert. Control Bull. 22, 27 (1993).
36. The solubility of aeolian Fe is only 10% to 50% [R. A. Duce and N. W. Tindale, Limnol. Oceanogr. 36, 1715 (1991)].
37. J. H. Martin and R. M. Gordon, Deep-Sea Res. 35, 177 (1988).
38. G. Zhuang, Z. Yi, R. A. Duce, P. R. Brown, Nature 355, 537 (1992).
39. N. M. Price, L. F. Andersen, F. M. M. Morel, Deep-Sea Res. 38, 1361 (1991).
40. K. H. Coale et al., Nature 383, 495 (1996).
41. L. A. Anderson, Deep-Sea Res. 42, 1675 (1995).
42. A. C. Redfield, B. H. Ketchum, F. A. Richards, in The Sea, M. N. Hill, Ed. (Wiley, New York, 1963), vol. 2, chap. 2.
43. Apparent oxygen utilization was determined from oxygen concentration, potential T, and S after Weiss [R. F. Weiss, Deep-Sea Res. 17, 721 (1970)].
44. t1 from 8 to 14 resulted in differences of <0.13 per mil per year in the reported trends.
45. Supported in part by the project Marine Ecosystems Regulation: Trace Metal and Carbon Dioxide Limitations (MERLIM) of the European Union within the Marine Science and Technology Programme under Contract MAS3-CT95-0005. We thank D. A. Wolf-Gladrow, A. Wischmeysr, R. Schlitzer, R. Gerdes, P. Falkowski, and T. Tyrrell for stimulating discussions on the topic and S. Burkhardt for helpful comments on an earlier version of this manuscript This study would not have been possible without the work of all people aboard the research vessels who collected the nutrient data and made them accessible. This is publication 1736 of the Alfred Wegener Institute for Polar and Marine Research.