Description: Das Projekt "Inverse Modellierung atmosphärischer chemischer Konstituenten (IMACCO)" wird vom Umweltbundesamt gefördert und von Forschungszentrum Jülich GmbH, Institut für Chemie und Dynamik der Geosphäre ICG-1: Stratospäere durchgeführt. The General ObjectivesToday, it is widely recognised that the present changes in the earth's environment, challenges our ability to detect and understand the various atmospheric processes and to assess the resulting impacts. The urgently needed knowledge about the present state of the atmosphere as part of the earth system, its atmospheric trace gas and aerosol budgets and their future variability requires reliable analyses, resting on information about observations of the governing processes. The prevailing problem: Even increasingly accurate and comprehensive measurements, only provide sparse snapshots of the instantaneous state of the system. Numerical models produce complete space-time data sets, based on our present, yet incomplete knowledge of the underlying processes. Hence, the results of pure model calculations are of limited and, more importantly, often unknown validity. The solution: Inversion: Improved conclusions must be inferred from processing procedures, which are able to combine observational data with models in a consistent and synergistic manner. The requested techniques can only be provided by advanced spatio-temporal data assimilation and inversion methods. The mission, objective and work program of IMACCO are aligned to this basic principle. A key technique adopted here is the variational calculus, resting on the tangent-linear and ad joint model derivatives. The four-dimensional variational data assimilation method is central to the methods used.
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Jülich ? Spurengas ? Aerosol ? Spurenstoff ? Assimilation ? Daten ? Inversionswetterlage ? Stratosphäre ? Modellierung ? Atmosphäre ? Atmosphärenchemie ? Forschungseinrichtung ? Umweltveränderung ? Atmosphärischer Prozess ? Geosphäre ? Erdsystem ? Cross-cutting ? Klimaänderungen und ihre Ursachen ?
Region: Nordrhein-Westfalen
Bounding box: 6.76339° .. 6.76339° x 51.21895° .. 51.21895°
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 2004-10-01 - 2007-09-30
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