Description: Das Projekt "Untersuchung der direkten und indirekten Beeinflussung des Klimas durch anthropogene Spurengasemissionen" wird vom Umweltbundesamt gefördert und von Max-Planck-Institut für Meteorologie durchgeführt. Assessment of the regional distributions of the methane sources and source strengths will be achieved by 'inverse modelling' using global three-dimensional tracer transport models (TM2 and MOGUNTIA) and global observations. Atmospheric chemistry models will be further developed to be able to calculate distributions of sulfur species, the methane cycle, taking into account the role of CO, NOx and several hydrocarbons. The models will be based on the transport models TM2 and MOGUNTIA. A scheme for radiation calculation of atmospheric radiation for use in the three-dimensional climate model ECHAM will be developed. It will be based on the Morcrette scheme, which is used in the ECMWF operational weather prediction model. A code will be developed, which will treat the trace gases independently, and which will take into account the optical properties of aerosols. The scheme will be compared with detailed line-by-line calculations. A scheme for treating aerosols in the MOGUNTIA model will be developed, based on earlier work on the sulfur cycle. For use in the ECHAM model, a parametrization will be developed to describe the major aerosol influence on cloud microstructure and the optical properties of clouds. The ECHAM model will be applied to estimate the indirect cooling effect of ozone depletion. Also, the ECHAM model, coupled with a MPI ocean model, will be applied to study the climatic responses to perturbations in the radiative fluxes by alteration of concentrations of methane, sulfate and ozone. Programm modules developed by the individual participants will be implemented in ECHAM and several sensitivity studies performed. Results of these studies will be used to improve the TM2 and MOGUNTIA models. Model results will be validated through comparison with trace gas measurements from monitoring networks, precipitation statistics, precipitation chemical composition, aerosol climatologies from in-situ and remote sensing data, and with satellite data on aerosol and cloud optical depths and liquid water path. Much of the work will be done in collaboration with the Center for Clouds, Chemistry and Climate (C4) in the USA.
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Ozon ? Sulfat ? Meteorologie ? Spurengas ? Tracer ? USA ? Aerosol ? Methan ? Stickoxide ? Internationale Zusammenarbeit ? Klimamodell ? Mathematisches Modell ? Mesoklima ? Modul ? Monitoring ? Anthropogener Einfluss ? Atmosphärenchemie ? Fernerkundung ? in situ ? Klimawandel ? Klimabeeinflussung ? Ozonabbau ? Stoffkreislauf ? Globale Aspekte ? ECHAM ? ECMWF ? MOGUNTIA ? MPI ? TM2 ?
Region: Hamburg
Bounding boxes: 9.99302° .. 9.99302° x 53.55073° .. 53.55073°
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 1993-01-01 - 1995-04-30
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