Major impact of dust deposition on the productivity of the Arabian Sea

Guieu, C; Al Azhar, M; Aumont, O; Mahowald, N; Levy, M; Ethé, C; Lachkar, Z. 2019 Major impact of dust deposition on the productivity of the Arabian Sea. Geophysical Research Letters, 46 (12). 6736-6744.

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In the Arabian Sea (AS), spatiotemporal nutrient limitation patterns of primary production and the possible role of nutrient inputs from the atmosphere are still not well understood. Using a biogeochemical model forced by modeled aerosol deposition, we show that without high atmospheric iron inputs through dust deposition during the summer monsoon, primary production over the AS would be reduced by half. Atmospheric iron deposition also supports most of the nitrogen fixation over the AS. However, our ocean biogeochemistry modeling results suggest that dinitrogen fixation constitutes a negligible fraction of the primary production. Finally, we show that atmospheric inputs of nitrogen, mostly from anthropogenic activities in India, have a negligible impact on primary production.

Item Type: Publication - Article
Additional Information. Not used in RCUK Gateway to Research.: Not subject to U.S. copyright
Divisions: Plymouth Marine Laboratory > Other (PML)
Depositing User: S Hawkins
Date made live: 12 Sep 2019 10:52
Last Modified: 16 Oct 2019 13:45

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