Description: Das Projekt "Indirect radiative forcing due to aerosols over the north atlantic region" wird vom Umweltbundesamt gefördert und von Freie Universität Berlin, Institut für Meteorologie, Institut für Weltraumwissenschaften durchgeführt. Objective: Cloudy-Column is one of five projects which constitute the European contribution to the second Aerosol Characterisation Experiment (ACE-2) of the International Global Atmospheric Chemistry Project (IGAC). Cloudy-Column is specifically dedicated to the study of the indirect effect. The objective is to develop parameterisations of marine extended stratocumulus for climate models, that include explicitly the characteristics of the aerosol background and their effects on cloud radiative properties. General Information: For the experimental phase, a field experiment will be conducted from the Tenorrhaphy island. It is based on simultaneous airborne measurements of the aerosol characteristics in the boundary layer, of cloud microphysical properties of stratocumulus and of their radiative properties. The instrumented aircraft will be equipped with a MAP and a Fast FSSP (Meteo-France Merlin-IV) for measurements of the interstitial aerosols and droplet size distributions and with POLDER and OVID (DLR Falcon-20) for radiative measurements. Various conditions with pure marine air, continental dust from Africa and polluted air from Europe will be documented in order to quantify the sensitivity of cloud radiative properties to the aerosol characteristics. A column closure experiment will be performed to validate parameterisations that describe the links between aerosol and cloud radiative properties, such as activation of condensation nuclei, droplet growth and spatial distribution, and resulting radiative properties. Numerical schemes of these processes will be improved and tested. The parameterisations will then be integrated in a mesoscale model for up scaling from the cloud scale to the scale of an ensemble of clouds for the development of parameterisations suitable for climate models. Finally, the project will be supported by a climatological study of the spatial and temporal distribution of aerosols based on the POLDER-ADEOS products. The classification of aerosol characteristics from clear air images and the radiative properties of clouds in the same area will be used for the generalisation of the results obtained in the region of Tenorrhaphy to the whole North Atlantic region. Prime Contractor: Universite de Clemont-Ferrand II, Universite Blaise Pascal, Laboratoire de Meteorologie Physique; Clemont-Ferrand; France.
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Wolkenbildung ? Wolke ? Bewölkung ? Verbreitungskarte ? Berlin ? Atmosphärisches Aerosol ? Meteorologie ? Polder ? Pflanzensamen ? Schadstoffwirkung ? Zellkern ? Staub ? Frankreich ? Island ? Aerosol ? Flugzeug ? Messprogramm ? Partikelgrößenverteilung ? Strahlungsmessung ? Luftverschmutzung ? Strahlung ? Insel ? Geoinformation ? Modellierung ? Quantitative Analyse ? Studie ? Windsichtung ? Größenverteilung ? Kausalzusammenhang ? Klimamodell ? Kondensation ? Luftfahrzeug ? Luftqualität ? Afrika ? Mathematisches Modell ? Europa ? Nordatlantik ? Freilandversuch ? Standortbedingung ? Grenzschicht ? Kenngröße ? Kondensationskern ? Globale Aspekte ? Physikalische Größe ? Atlantischer Ozean ? Strahlungsantrieb ? Atmosphärenchemie ? Ozean ? Stratocumulus ? droplet-size-distribution ? interstitial-aerosol ? Aerosolentstehung ? Tenorrhaphy-island ? Zeitverlauf ?
Region: Berlin
Bounding boxes: 10.44987° .. 10.44987° x 54.03573° .. 54.03573°
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 1996-01-01 - 1998-12-31
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