Interannual monsoon wind variability as a key driver of East African small pelagic fisheries

Jebri, Fatma, Jacobs, Zoe L, Raitsos, Dionysios E, Srokosz, Meric, Painter, Stuart C, Kelly, Stephen, Roberts, Michael J, Scott, Lucy, Taylor, Sarah FW, Palmer, Matthew
et al (show 4 more authors) (2020) Interannual monsoon wind variability as a key driver of East African small pelagic fisheries. SCIENTIFIC REPORTS, 10 (1). 13247-.

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Small pelagic fisheries provide food security, livelihood support and economic stability for East African coastal communities-a region of least developed countries. Using remotely- sensed and field observations together with modelling, we address the biophysical drivers of this important resource. We show that annual variations of fisheries yield parallel those of chlorophyll-a (an index of phytoplankton biomass). While enhanced phytoplankton biomass during the Northeast monsoon is triggered by wind-driven upwelling, during the Southeast monsoon, it is driven by two current induced mechanisms: coastal "dynamic uplift" upwelling; and westward advection of nutrients. This biological response to the Southeast monsoon is greater than that to the Northeast monsoon. For years unaffected by strong El-Niño/La-Niña events, the Southeast monsoon wind strength over the south tropical Indian Ocean is the main driver of year-to-year variability. This has important implications for the predictability of fisheries yield, its response to climate change, policy and resource management.

Item Type: Article
Uncontrolled Keywords: 7 Affordable and Clean Energy
Divisions: Faculty of Science and Engineering > School of Environmental Sciences
Depositing User: Symplectic Admin
Date Deposited: 08 Sep 2021 10:03
Last Modified: 15 Mar 2024 04:03
DOI: 10.1038/s41598-020-70275-9
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