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SFB 350:  Wechselwirkungen kontinentaler Stoffsysteme und ihre Modellierung

Subject Area Geosciences
Term from 1991 to 2001
Project identifier Deutsche Forschungsgemeinschaft (DFG) - Project number 5478386
 
The collaborative research centre 350 investigates the predictability of complex multiscale processes in the geosphere, so called earth systems. For this purpose we have to observe, to analyse and to quantify numerous interactions between the components of a system. Because of the system complexity and the various scales in space and time the quality of the appraisal of the system behaviour will be a function of the considered size of a system in terms of the selected interactions. Our aim is therefore, to find characteristic scaling parameters and representative system variables in order to improve the predictability. A large number of earth systems exhibit signatures of selforganization as well as self-similarity of events. In the latter case systems are supposed to be in a state of self-organized criticality. Practically the investigations require the observation of the multiscale aspects from both short-term processes and long-term records of events hidden in sedimentary deposits. Exemplary studies are carried out for four earth systems. Processes comprising the troposphere, vegetation and soil allow a reasonable record of the multiscale nature of the phenomena. The soil zone with penetrating fluids represent a system which is dominated by microscale interactions. The land surface serves as an example at pattern-formation processes in the sense of a continually moving boundary. Finally the sedimentary record along rivers and in basins provides the long term memory at climate change, tectonic controll and chemical alterations.
DFG Programme Collaborative Research Centres
International Connection Sweden, United Kingdom

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