Publication Abstracts

Kanakidou et al. 2012

Kanakidou, M., R.A. Duce, J.M. Prospero, A.R. Baker, C. Benitez-Nelson, F.J. Dentener, K.A. Hunter, P.S. Liss, N. Mahowald, G.S. Okin, M. Sarin, K. Tsigaridis, M. Uematsu, L.M. Zamora, and T. Zhu, 2012: Atmospheric fluxes of organic N and P to the global ocean. Glob. Biogeochem. Cycles, 26, GB3026, doi:10.1029/2011GB004277.

The global tropospheric budget of gaseous and particulate non-methane organic matter (OM) is re-examined to provide a holistic view of the role that OM plays in transporting the essential nutrients nitrogen and phosphorus to the ocean. A global 3-dimensional chemistry-transport model was used to construct the first global picture of atmospheric transport and deposition of the organic nitrogen (ON) and organic phosphorus (OP) that are associated with OM, focusing on the soluble fractions of these nutrients. Model simulations agree with observations within an order of magnitude. Depending on location, the observed water soluble ON fraction ranges from ∼3% to 90% (median of ∼35%) of total soluble N in rainwater; soluble OP ranges from ∼20-83% (median of ∼35%) of total soluble phosphorus. The simulations suggest that the global ON cycle has a strong anthropogenic component with ∼45% of the overall atmospheric source (primary and secondary) associated with anthropogenic activities. In contrast, only 10% of atmospheric OP is emitted from human activities. The model-derived present-day soluble ON and OP deposition to the global ocean is estimated to be ∼16 Tg-N/yr and ∼0.35 Tg-P/yr respectively with an order of magnitude uncertainty. Of these amounts ∼40% and ∼6%, respectively, are associated with anthropogenic activities, and 33% and 90% are recycled oceanic materials. Therefore, anthropogenic emissions are having a greater impact on the ON cycle than the OP cycle; consequently increasing emissions may increase P-limitation in the oligotrophic regions of the world's ocean that rely on atmospheric deposition as an important nutrient source.

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BibTeX Citation

  author={Kanakidou, M. and Duce, R. A. and Prospero, J. M. and Baker, A. R. and Benitez-Nelson, C. and Dentener, F. J. and Hunter, K. A. and Liss, P. S. and Mahowald, N. and Okin, G. S. and Sarin, M. and Tsigaridis, K. and Uematsu, M. and Zamora, L. M. and Zhu, T.},
  title={Atmospheric fluxes of organic N and P to the global ocean},
  journal={Glob. Biogeochem. Cycles},

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RIS Citation

ID  - ka02200i
AU  - Kanakidou, M.
AU  - Duce, R. A.
AU  - Prospero, J. M.
AU  - Baker, A. R.
AU  - Benitez-Nelson, C.
AU  - Dentener, F. J.
AU  - Hunter, K. A.
AU  - Liss, P. S.
AU  - Mahowald, N.
AU  - Okin, G. S.
AU  - Sarin, M.
AU  - Tsigaridis, K.
AU  - Uematsu, M.
AU  - Zamora, L. M.
AU  - Zhu, T.
PY  - 2012
TI  - Atmospheric fluxes of organic N and P to the global ocean
JA  - Glob. Biogeochem. Cycles
VL  - 26
SP  - GB3026
DO  - 10.1029/2011GB004277
ER  -

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