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Biogeosciences An interactive open-access journal of the European Geosciences Union
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Volume 3, issue 3
Biogeosciences, 3, 271–280, 2006
https://doi.org/10.5194/bg-3-271-2006
© Author(s) 2006. This work is licensed under
the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.

Special issue: SPOT-ON: Recent advances in the biogeochemistry of nitrogen...

Biogeosciences, 3, 271–280, 2006
https://doi.org/10.5194/bg-3-271-2006
© Author(s) 2006. This work is licensed under
the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.

  29 Jun 2006

29 Jun 2006

The role of air-sea exchange in the marine nitrogen cycle

T. Jickells T. Jickells
  • Laboratory for Global Marine and Atmospheric Chemistry, School of Environmental Sciences, University of East Anglia, Norwich NR4 7TJ, UK

Abstract. This contribution to the Spot-On volume considers the magnitude and composition of atmospheric nitrogen inputs to the oceans and then goes on to consider the impacts of these inputs. Effects in open ocean and coastal areas are probably different. Offshore atmospheric inputs may produce a small enhancement of overall ocean productivity and hence CO2 drawdown. In coastal waters atmospheric inputs contribute significantly to overall eutrophication pressure, but evidence that they trigger algal blooms is limited. Management of atmospheric inputs to coastal waters to mitigate eutrophication pressures requires that emissions be managed over a wide area reflecting the efficient long range transport of atmospheric nitrogen. Strategies for management of oxidised and reduced nitrogen deposition will be different reflecting their different rates of deposition.

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