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Fertilizing the Amazon and equatorial Atlantic with West African dust
Abstract
Atmospheric mineral dust plays a vital role in Earth's climate and biogeochemical cycles. The Bodélé Depression in Chad has been identified as the single biggest source of atmospheric mineral dust on Earth. Dust eroded from the Bodélé is blown across the Atlantic Ocean towards South America. The mineral dust contains micronutrients such as Fe and P that have the potential to act as a fertilizer, increasing primary productivity in the Amazon rain forest as well as the equatorial Atlantic Ocean, and thus leading to N 2 fixation and CO 2 drawdown. We present the results of chemical analysis of 28 dust samples collected from the source area, which indicate that up to 6.5 Tg of Fe and 0.12 Tg of P are exported from the Bodélé Depression every year. This suggests that the Bodélé may be a more significant micronutrient supplier than previously proposed.
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Cites
The geochemical evolution of the continental crust
Taylor, S. R., & McLennan, S. M. (1995) · Reviews of Geophysics · doi:10.1029/95rg00262 · Cited by 4,643
Cited by
Yu, H., Chin, M., Yuan, T., Bian, H., Remer, L. A., Prospero, J. M., Omar, A., Winker, D., Yang, Y., Zhang, Y., et al. (2015) · Geophysical Research Letters · doi:10.1002/2015gl063040 · Cited by 409
The seasonal vertical distribution of the Saharan Air Layer and its modulation by the wind
Tsamalis, C., Chédin, A., Pelon, J., & Capelle, V. (2013) · Atmospheric Chemistry and Physics · doi:10.5194/acp-13-11235-2013 · Cited by 142
Prospero, J. M., Delany, A. C., Delany, A. C., & Carlson, T. N. (2021) · Bulletin of the American Meteorological Society · doi:10.1175/bams-d-19-0309.1 · Cited by 91
A global doubling of dust emissions during the Anthropocene?
Hooper, J., & Marx, S. (2018) · Global and Planetary Change · doi:10.1016/j.gloplacha.2018.07.003 · Cited by 78
Metadata
- Authors
- Bristow, C. S., Hudson‐Edwards, K. A., & Chappell, A.
- Venue
- Geophysical Research Letters
- Publisher
- American Geophysical Union (AGU)
- Published
- 2010-07
- Volume
- 37
- Issue
- 14
- ISSN
- 0094-8276 (ISSN-L)
- 1944-8007
- OpenAlex
- W1678317034
- Cited by
- 288
- References
- 1
- FWCI
- 6.86
- Type
- journal article
- Language
- en
- Open access
- closed
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- Bristow, C. S., Hudson‐Edwards, K. A., & Chappell, A. (2010). Fertilizing the Amazon and equatorial Atlantic with West African dust. Geophysical Research Letters. https://doi.org/10.1029/2010gl043486
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