P-Campus-Ringvorlesung am 16.11.23

Am 16. November findet der letzte Vortrag der P-Campus-Ringvorlesung 2023 statt. Dr. Khanneh Wadinga Fomba spricht über "Phosphorus Availability and Sources in the North and Southeastern Tropical Atlantic Regions of Africa". Die Vorlesung beginnt um 15:00 Uhr und wird online via Webex übertragen.

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Long-distance transport of aerosol-derived nutrients is known to contribute valuable nutrients to open ocean marine ecosystems, however, our understanding of the sustained nutrient flows, essential for assessing their spatiotemporal variation and availability, remains incomplete. During transport, these particles may undergo atmospheric aging through interactions with aerosol gaseous species (e.g. NOX, HOx, O3, SOx) that may modify their surface properties and influence the bioavailability of the nutrients they carry. This study will delve into the highlights of the PHOSDMAP "Phosphorus Speciation in Mineral Dust and Marine Aerosol Particles" project that was executed in the regions of the northeastern and southeastern tropical Atlantic oceans at the CVAO (Cabo Verde) and NDAO (Namibia) respectively. The long-term phosphorus fluxes in its different forms and the impact of atmospheric processes on the aerosol derived soluble phosphorus budgets will be presented. Additionally, the effects of the nutrient deposition, including nitrate fluxes, on the local marine ecosystem in the Cabo Verde region will be highlighted.