Details for Aerosol generation by waves breaking on small islands and rocks near the mace head research sta

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Name:Aerosol generation by waves breaking on small islands and rocks near the mace head research sta
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Kunz, GJ, CD O'Dowd, G de Leeuw, Aerosol generation by waves breaking on small islands and rocks near the Mace Head research station. European Aerosol Conference, 2000, J. Aerosol. Sci., Suppl 1., 656-657, 2000. [36] Kleefeld, C., S O'Rielly, SG Jennings, E Becker, C O'Dowd, G Kunz and G de Leeuw, Aerosol scattering: relation to primary and secondary aerosol production in the coastal atmosphere during the PARFORCE campaign, European Aerosol Conference, 2000, J. Aerosol. Sci., Suppl 1., 658-659, 2000.


Abstract


Two coastal field experiments (September 1998 and in June 1999) were conducted at Mace Head, Ireland, under the EU-funded PARFORCE (New P__._~icle Formation and Fate in the Coastal Environment) programme which was designed to elucidate the processes which control and promote homogeneous heteromolecular nucleation in the coastal boundary layer. During conditions of westerly winds and after sufficiently long fetch, the Mace Head station is regularly exposed to pure maritime and clean arctic atmospheres. Under these conditions the generation and growth of new particles due to photochemical conversion of biological emissions is seen to occur on almost a daily basis (e.g., O'Dowd et al., 1998 and O'Dowd et al., 1999). During the PARFORCE experiments the TNO Physics and Electronics Laboratory (TNO-FEL) undertook to measure boundary layer dynamics, as determined from the aerosol structures measured with a lidar (light detection and ranging) system. The results revealed the generation of large amounts of sea spray Aerosol by waves breaking on the islands and roCks near the Mace Head station. The location, size and dynamics of these locally generated aerosol plumes were determined from series of consecutive horizontal and vertical scans. The horizontal extent of these aerosol plumes is highly coherent over distances of several kilometres and the vertical extent is generally between a few tens of meters to a few hundreds of meters. In some occasions the aerosol was observed to be taken aloft to the top of the mixed layer at an altitude of about one kilometre.

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