The Mt Cimone, Italy, free tropospheric campaign: principal characteristics of the gaseous and aerosol composition from European pollution, Mediterranean influences and during African dust events

A 5 weeks experiment (1 June to 5 July 2000) took place at a mountain site, Mt Cimone (44º11' N, 10º42' E, 2165 m a.s.l.), that is representative of Southern Europe background conditions. During this field campaign, a comprehensive characterisation of trace gases and radicals, involved in the production and destruction of O3, as well as of chemical, physical and optical properties of the aerosol was done. Atmospheric gases and aerosols were measured continuously over the 5 weeks period, in order to characterize their background concentrations in the free troposphere and their respective differences in air containing dust aerosols advected from Africa. Due to its location and elevation, Mt Cimone gets free tropospheric air both from the Mediterranean and from the Po Valley, which makes it an invaluable place to study gas/aerosol interactions. A global chemical model coupled to a GCM was used to simulate based upon ECMWF reanalysis the ozone over the region during the period of the field study. The heterogeneous reactions of O3, N2O5, HNO3 and NO3 were accounted for. We estimate that during the field campaign, the effect of heterogeous reactions was to reduce by 8 to 10% the ozone concentration at MTC in cases when air had passed over the Mediterranean Sea. When air was coming from the Atlantic or continental Europe, the reduction of ozone is still 4%. This reduction is mostly due to the large uptake of HNO3 and is the the topic of ongoing work to assess how it affects the global cycle of O3 and the global nitrogen budget.

Citation proposal
Yves Balkanski (National Centre for Scientific Research,Laboratory CEA-CNRS-UVSQ, LSCE/IPSL) - Susann E. Bauer (National Centre for Scientific Research,Laboratory CEA / CNRS, LSCE) - Rita Van Dingenen (European Commission, Joint Research Centre, Institute for Environment and Sustainability) - Frank Raes (European Commission, Joint Research Centre, Institute for Environment and Sustainability) - M. Schulz (National Centre for Scientific Research,Laboratory CEA / CNRS, LSCE) - Didier A. Hauglustaine (National Centre for Scientific Research,Laboratory CEA / CNRS, LSCE) - Paolo Bonasoni (Institute of Atmospheric Sciences and Climate (ISAC) - CNR) - Horst Fischer (Max Planck Institute for Chemistry) - Gian Paolo Gobbi (Institute of Atmospheric Sciences and Climate (ISAC) National Research Council) - Markus Hanke (Max-Planck Institute for Nuclear Physics, Atmospheric Physics Division) - Jean P. Putaud (European Commission, Joint Research Centre, Institute for Environment and Sustainability,) - Andreas Stohl (Department of Ecology, Technical University Munich,) (2003) . The Mt Cimone, Italy, free tropospheric campaign: principal characteristics of the gaseous and aerosol composition from European pollution, Mediterranean influences and during African dust events. Copernicus GmbH (Copernicus Publications) https://geoportal.mountaingenius.org/geonetwork/srv/api/records/9a7f7eec-8ef6-44d2-b69c-f430dd6dbabd

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File identifier: 9a7f7eec-8ef6-44d2-b69c-f430dd6dbabd XML

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Protocol: WWW:LINK-1.0-http--partners

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Metadata language: eng

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Climatology, meteorology, atmosphere
Environment

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Mt Cimone

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ozone , aerosol , dust events , ozone concentrations , aerosol composition

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Date ( Publication ): 2003-03-23T00:00:00

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"The Mt Cimone, Italy, free tropospheric campaign: principal characteristics of the gaseous and aerosol composition from European pollution, Mediterranean influences and during African dust events"

Atmos. Chem. Phys. Disc., 3,1753-1776, 2003.

Balkanski, Y., Bauer, S. E., Van Dingenen, R., Bonasoni, P., Schulz, M., Fischer, H., Gobbi, G. P., Hanke, M., Hauglustaine, D., Putaud, J.-P., Stohl, A., Raes, F.