@article{fdi:010040934,
  title = {{O}cean biogeochemistry exhibits contrasting responses to a large scale reduction in dust deposition},
  author = {{T}agliabue, {A}. and {B}opp, {L}. and {A}umont, {O}livier},
  editor = {},
  language = {{ENG}},
  abstract = {{D}ust deposition of iron is thought to be an important control on ocean biogeochemistry and air-sea {CO}2 exchange. {I}n this study, we examine the impact of a large scale, yet climatically realistic, reduction in the aeolian {F}e input during a 240 year transient simulation. {I}n contrast to previous studies, we find that the ocean biogeochemical cycles of carbon and nitrogen are relatively insensitive (globally) to a 60% reduction in {F}e input from dust. {N}et primary productivity ({NPP}) is reduced in the {F}e limited regions, but the excess macronutrients that result are able to fuel additional {NPP} elsewhere. {O}verall, {NPP} and air-sea {CO}2 exchange are only reduced by around 3% between 1860 and 2100. {W}hile the nitrogen cycle is perturbed more significantly (by similar to 15%), reduced {N}-2 fixation is balanced by a concomitant decline in denitrification. {F}eedbacks between {N}-2 fixation and denitrification are controlled by variability in surface utilization of inorganic nitrogen and subsurface oxygen consumption, as well as the direct influence of {F}e on {N}-2 fixation. {O}verall, there is relatively little impact of reduced aeolian {F}e input (< 4%) on cumulative {CO}2 fluxes over 240 years. {T}he lower sensitivity of our model to changes in dust input is primarily due to the more detailed representation of the continental shelf {F}e, which was absent in previous models.},
  keywords = {},
  booktitle = {},
  journal = {{B}iogeosciences},
  volume = {5},
  numero = {1},
  pages = {11--24},
  ISSN = {1726-4170},
  year = {2008},
  URL = {https://www.documentation.ird.fr/hor/fdi:010040934},
}