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| Titel |
Human-driven changes in dissolved phosphorus deposition to the ocean |
| VerfasserIn |
Stelios Myriokefalitakis, Athanasios Nenes, Maria Kanakidou |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250124171
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| Publikation (Nr.) |
 EGU/EGU2016-3552.pdf |
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| Zusammenfassung |
| The atmospheric cycle of phosphorus (P) is parameterized in a global 3-D chemistry-transport model by taking into account the primary emissions of total (TP) and dissolved P (PO4) associated with dust, sea-salt, bioaerosols and combustion particles of anthropogenic and natural sources. Mineral sources are calculated to contribute by roughly 80% to the TP emissions. The calculated annual deposition flux of PO4 presents strong spatial and temporal variability with about 30% occurring over the ocean. Sensitivity simulations using preindustrial (year 1850), present (year 2008) and future (year 2100) anthropogenic and biomass burning emission scenarios, indicate that an increase in dust-P dissolution flux may have occurred in the last 150 years due to increasing atmospheric acidity due to anthropogenic emissions. On the opposite, a decrease of dust-P containing dissolution flux is projected for near future, since air-quality regulations are expected to reduce atmospheric acidity compared to present-day. Present day simulations of atmospheric P aerosol concentrations and deposition fluxes compare satisfactorily with available observations, thus, providing confidence to the model results. This work has been co‐financed by the European Union (European Social Fund – ESF) and Greek national funds through the Operational Program "Education and Lifelong Learning" of the National Strategic Reference Framework (NSRF) ‐ Research Funding Program: ARISTEIA – PANOPLY (Pollution Alters Natural Aerosol Composition: implications for Ocean Productivity, cLimate and air qualitY) grant. |
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