EG 2019 session> Air-sea Chemical Fluxes : Impacts on Biogeochemistry and Climate – DL 10 Jan 19

Convener: Parvadha Suntharalingam  | Co-conveners: Robert Duce , Maria Cristina Facchini , Maria Kanakidou , Arvind Singh

Air-sea fluxes of biogeochemically  active constituents  have significant impacts on global biogeochemistry and climate.  Increasing atmospheric deposition  of anthropogenically-derived nutrients (e.g., nitrogen, phosphorus, iron) to the ocean  influence marine productivity and have associated impacts on oceanic CO2 uptake, and emissions to the atmosphere of climate active species (e.g., nitrous-oxide (N2O), dimethyl-sulfide  (DMS),marine organic compounds and halogenated species).  These oceanic  fluxes  of reactive  species  and greenhouse gases influence atmospheric chemistry and global climate, and induce  potentially important chemistry-climate feedbacks. While advances have been made by laboratory, field, and modelling studies over the past decade, we still lack understanding of many of the  physical and biogeochemical processes linking  atmospheric deposition, nutrient availability, marine biological productivity and the biogeochemical cycles governing  air-sea fluxes of these climate active species.  Atmospheric inputs of other toxic substances, e.g., lead, cadmium, copper and persistent organic pollutants, into the ocean are also of concern.

This session will address the atmospheric deposition of nutrients and toxic substances to the ocean, their impacts on ocean biogeochemistry, the air-sea fluxes of climate active species and potential feedbacks to climate. We welcome new findings from both measurement programmes and atmospheric and oceanic models.

This session is jointly sponsored by GESAMP Working Group 38 on ‘Atmospheric Deposition of Nitrogen and its Impact on Marine Biogeochemistry’, the Surface Ocean-Lower Atmosphere Study (SOLAS)  and the International Commission on Atmospheric Chemistry and Global Pollution (iCACGP).

Abstract submission by 10 January 2019 here.

Application for the EGU travel support by 1 December 2018 here.