Description: Das Projekt "Use of a hill cap cloud to study aerosol interactions in ACE-2" wird vom Umweltbundesamt gefördert und von Universität Wien, Institut für Experimentalphysik durchgeführt. Objective: To determine the radiative forcing of anthropogenic aerosols advected over the sub-tropical North Atlantic through the study of the transformation of the aerosol size distribution, chemical composition and hygroscopic. General Information: The project is part of the European contribution to the second Aerosol Characterisation Experiment (ACE-2) of the International Global Atmospheric Chemistry Project (IGAC). ACE-2 and the connection with the other projects has been discussed at several open planning meetings, and is described in the science and implementation plan. The specific tasks are: 1. To investigate the relationship between the cloud droplet size distribution and the chemical composition, size distribution and hygroscopic properties of the aerosol entering the cloud. 2. To investigate the nucleation scavenging of aerosol as it enters the cloud, as a function of particle size and chemistry. 3. The effect of aqueous phase cloud chemistry, including the oxidation of S(IV), the production of nitrate ions, the solution of soluble trace gases on the size distribution, chemical composition and hygroscopic properties of the aerosol. 4. To investigate possible processes producing new ultra fine particles by gas to particle conversion near cloud. 5. To investigate the interaction of DMS and its oxidation products with cloud. 6. To study the effects of the entrainment of free tropospheric air through cloud top on each of the above. Using a ground based system of this kind it will be possible to make detailed continuous measurements of the atmospheric trace gases entering and leaving the cloud. Flights will be made using the UK Meteorological Office C-130 aircraft to make profiles of the thermodynamic and trace gas constituents of the atmosphere over the sea upwind of the island and above the top of the cap cloud. Process modelling is described which will be essential to the detailed planning of the project and the interpretation of the data. Prime Contractor: University of Manchester Institute of Science and Technology, Department of Pure and Applied Physics; Manchester; UK.
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Wolkenbildung ? Wolke ? Bewölkung ? Wien ? Nitrat ? Dimethylsulfid ? Meteorologie ? Ultrafeinstaub ? Kombinationswirkung ? Spurengas ? Thermodynamik ? Wind ? Schwefel ? Atmosphärisches Aerosol ? Island ? Chemische Zusammensetzung ? Flugzeug ? Kind ? Löslichkeit ? Luftbewegung ? Messprogramm ? Partikelgrößenverteilung ? Aerosol ? Insel ? Gasförmiger Stoff ? Flüssiger Stoff ? Schadstoffausbreitung ? Nordatlantik ? Oxidation ? Gaswolke ? Schadstoffanalyse ? Größenverteilung ? Studie ? Ionen ? Tropengebiet ? Troposphäre ? Vertikalprofil ? Kondensation ? Meeresgewässer ? Modellierung ? Daten ? Luftfahrzeug ? Partikelförmige Luftverunreinigung ? Atmosphäre ? Feuchtigkeit ? Schadstoffbildung ? Kondensationskern ? Atmosphärenchemie ? Schadstoffverhalten ? Physikalischer Vorgang ? Atlantischer Ozean ? Chemische Reaktion ? Anthropogener Einfluss ? Ausbreitungsvorgang ? Strahlungsantrieb ? ACE-2 ? Chemische Wertigkeit ? Hygroskopizität ? Speziation [Chemie] ? DMS ?
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 1996-03-01 - 1998-08-31
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