A Comparison of Traditional and New Inverse Modelling Techniques for Source Term Identification in the Atmosphere

0448985 - ÚTIA 2016 AT eng A - Abstrakt
Branda, Martin - Adam, Lukáš
A Comparison of Traditional and New Inverse Modelling Techniques for Source Term Identification in the Atmosphere.
CTBT: Science and Technology 2015. Vienna: CTBTO, 2015.
[CTBT: Science and Technology 2015. 22.06.2015-26.06.2015, Vienna]
Grant CEP: GA MŠMT(CZ) 7F14287
Institucionální podpora: RVO:67985556
Klíčová slova: Sparse Optimization * Inverse Modelling * Atmospheric Modelling
http://library.utia.cas.cz/separaty/2015/E/branda-0448985.pdf

Inverse modelling plays an important role in identifying the amount of substances released into atmosphere during power plant accidents, volcano eruptions or CO2 emissions. The problem leads to minimization of the discrepancy between the measurements in atmosphere during a particular time period and the model predictions. First, we review the standard methods based on Tikhonov regularization and Bayesian modelling. Then, we propose several optimization techniques which can be used to find sparse solutions and discuss their modifications to handle selected constraints such as nonnegativity and simple linear constraints, for example the minimal or maximal amount of total release. These techniques range from successive convex approximations to solution of mixed-integer programming problems. Finally, the new methods are applied on the European Tracer Experiment (ETEX).
Trvalý link: http://hdl.handle.net/11104/0250582