Sinking organic matter spreads the nitrogen isotope signal of pelagic denitrification in the North Pacific

Geophysical Research Letters

Volumn 36, Issue 8, 2009, Pages

  Sigman, Daniel M ^a   DiFiore, Peter J ^a   Hain, Mathis P ^a,b   Deutsch, Curtis ^c   Karl, David M ^d  

^a PRINCETON UNIVERSITY   (United States)

^b UNIVERSITY OF POTSDAM   (Germany)

^c UNIVERSITY OF CALIFORNIA   (United States)

^d UNIVERSITY OF HAWAII   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

BOX MODELS; DEEP OCEAN; DENITRIFYING BACTERIA; DEPTH PROFILE; EQUIVALENT GRADIENTS; NITRATE ISOTOPES; NITRATE-N; NITROGEN ISOTOPES; NORTH PACIFIC; OCEAN TIME; ORGANIC MATTER;

BACTERIA; ISOTOPES; NITRATES; OCEAN ENGINEERING; OCEANOGRAPHY; ORGANIC COMPOUNDS;

DENITRIFICATION;

DENITRIFICATION; NITROGEN ISOTOPE; ORGANIC MATTER; SUBOXIC CONDITIONS; NITRIFYING BACTERIUM; TIME SERIES;

HAWAII [UNITED STATES]; NORTH AMERICA; UNITED STATES;

EID: 67449158498     PISSN: 00948276     EISSN: None     Source Type: Journal    
DOI: 10.1029/2008GL035784     Document Type: Article

References (23)

1. Altabet, M. A., et al. (1999), The nitrogen isotope biogeochemistry of sinking particles from the margin of the eastern North Pacific., Deep Sea Res., Part I, 46, 655-679.
2. 16O measurements and observations on nitrate-water equilibration, Rapid Commun. Mass Spectrum., 17, 1835-1846.
3. Brandes, J. A., and A. H. Devol (1997), Isotopic fractionation of oxygen and nitrogen in coastal marine sediments, Geochim Cosmochim Acta, 61, 1793-1801.
4. Brandes, J. A., and A. H. Devol (2002), A global marine fixed nitrogen isotopic budget: Implications for Holocene nitrogen cycling, Global Bio-geochem. Cycles, 16(4), 1120, doi:10.1029/2001GB001856.
5. Brandes, J. A., et al. (1998), Isotopic composition of nitrate in the central Arabian Sea and eastern tropical North Pacific: A tracer for mixing and nitrogen cycles, Limnol. Oceanogr., 43, 1680-1689.
6. Casciotti, K. L., et al. (2002), Measurement of the oxygen isotopic composition of nitrate in seawater and freshwater using the denitrifier method, Anal. Chem., 74, 4905-4912.
7. Casciotti, K. L., et al. (2008), Constraints on nitrogen cycling at the subtropical North Pacific Station ALOHA from isotopic measurements of nitrate and particulate nitrogen, Deep Sea Res., Part II, 55, 1661-1672.
8. 2 fixation in the Pacific Ocean, Global Biogeochem. Cycles, 15, 483-506.
9. Deutsch, C., D. M. Sigman, R. C. Thunell, A. N. Meckler, and G. H. Haug (2004), Isotopic constraints on glacial/interglacial changes in the oceanic nitrogen budget, Global Biogeochem: Cycles, 18, GB4012, doi:10.1029/2003GB002189.
10. Granger, J., et al. (2004), Coupled nitrogen and oxygen isotope fractionation of nitrate during assimilation by cultures of marine phytoplankton, Limnol. Oceanogr., 49, 1763-1773.
11. Granger, J., et al. (2008), Nitrogen and oxygen isotope fractionation during dissimilatory nitrate reduction by denitrifying bacteria, Limnol. Oceanogr., 53, 2533-2545.
12. Karl, D., et al. (2002), Dinitrogen fixation in the world's oceans, Biogeochemistry, 57/58, 47-98.
13. Keir, R. S. (1988), On the late Pleistocene ocean geochemistry and circulation, Paleoceanography, 3, 413-445.
14. Knapp, A. N., D. M. Sigman, and F. Lipschultz (2005), N isotopic composition of dissolved organic nitrogen and nítrate at the Bermuda Atlantic Time-Series Study site, Global Biogeochem. Cycles, 19, GB 1018, doi:10.1029/2004GB002320.
15. 16O of nitrate as a constraint on benthic nitrogen cycling, Mar. Chem., 88, 1-20.
16. 14N in marine sediments and the impact of benthic nitrogen loss on the isotopic composition of oceanic nitrate, Geochim Cosmochim Acta, 71, 5384-5404.
17. Liu, K. K., et al. (1996), The nitrogen isotopic composition of nitrate in the Kuroshio Water northeast of Taiwan: Evidence for nitrogen fixation as a source of isotopically light nitrate, Mar. Chem., 54, 273.-292.
18. Middelburg, J. J., K. Soetaert, P. M. J. Herman, and C. H. R. Heip (1996), Denitrification in marine sediments: A model study, Global Biogeochem. Cycles, 10, 661-673.
19. Montoya, J. P., et al. (2002), Nitrogen fixation and nitrogen isotope abundances in zooplankton of the oligotrophic North Atlantic., Limnol. Oceanogr., 47, 1617-1628.
20. Schmitz, W. J. (1995), On the interbasin-scale thermohaline circulation, Rev. Geophys., 33, 151-173.
21. 15N of nitrate in the Southern Ocean: Consumption of nitrate in surface waters, Global Biogeochem. Cycles, 13, 1149-1166.
22. Sigman, D. M., et al. (2001), A bacterial method for the nitrogen isotopic analysis of nitrate in seawater and freshwater, Anal. Chem., 73, 4145-4153.
23. Sigman, D. M., J. Granger, P. J. DiFiore, M. M. Lehmann, R. Ho, G. Cane, and A. van Geen (2005), Coupled nitrogen and oxygen isotope measurements of nitrate along the eastern North Pacific margin, Global Biogeochem. Cycles, 19, GB4022, doi:10.1029/2005GB002458.