Publications des scientifiques de l'IRD

Aumont Olivier, Bopp L., Schulz M. (2008). What does temporal variability in aeolian dust deposition contribute to sea-surface iron and chlorophyll distributions ? - art. no. L07607. Geophysical Research Letters, 35 (7), p. NIL_6-NIL_10. ISSN 0094-8276.

Titre du document
What does temporal variability in aeolian dust deposition contribute to sea-surface iron and chlorophyll distributions ? - art. no. L07607
Année de publication
2008
Type de document
Article référencé dans le Web of Science WOS:000255075100001
Auteurs
Aumont Olivier, Bopp L., Schulz M.
Source
Geophysical Research Letters, 2008, 35 (7), p. NIL_6-NIL_10 ISSN 0094-8276
Dust deposition is extremely variable over all timescales. Yet the impact of this variability on ocean biogeochemistry is currently not known, at least on the global scale. Here, we force a global model of ocean biogeochemistry over 1996 to 2001 with daily fields of dust deposition simulated by an atmospheric aerosol model. Our model results suggest that dust deposition explains a large part of the temporal variability of surface iron in the tropical regions and in part of the subarctic Pacific. However, while dust deposition is dominated by daily events, its impact on surface iron is maximal on interannual timescales. The largest fluctuations of surface iron produced by dust occur in oligotrophic regions where phytoplankton growth is not primarily controlled by iron availability. Consequently, the variability of surface chlorophyll induced by aerosol iron is predicted to be very small everywhere, especially relative to the impact of the ocean dynamics.
Plan de classement
Géologie et formations superficielles [064]
Description Géographique
PACIFIQUE ; ARCTIQUE
Localisation
Fonds IRD
Identifiant IRD
PAR00002422
Contact