Derivation of Trace Gas Information combining Differential Optical Absorption Spectroscopy with Radiative Transfer Modelling

The Differential Optical Absorption Spectroscopy (DOAS) is an established remote sensing technique for atmospheric constituent probing. To derive quantitative distribution data of trace gas distributions it is necessary to combine novel measurement techniques like Multi-Axis DOAS with realistic radiative transfer modelling. In this thesis three three-dimensional spherical Monte Carlo based radiative transfer model TRACY is brought to operational status and employed for the interpretation of several own and existing measurements with different DOAS platforms. In contrast to established models, no approximations and simplifications of geometry or physical processes are needed. Additional model output parameters describing the scattering of the light allow for the understanding of the spectroscopic model results and for conclusions on the geometrie’s sensitivity to certain trace gas distribution shapes. The decisive role of the aerosols in radiative transfer was investigated. They were found to influence measurement to an extent rendering any geometric approximation of the measurement sensitivity invalid. Combination of measured quantities including O4 absorption with modelling allow for conclusions on their abundance. They, in conjunction with knowledge on sources and sinks of the considered species, allow for the projection of unknown parameters onto measurable quantities, which facilitates the derivation of quantitative distributions.

Level thesis:degree_level

thesis.doctoral

Grantor dc:publisher

Universität Heidelberg

Year

2003

Author dc:creator

• Friedeburg, Christoph von

Contributors dc:contributor

• Platt, Ulrich

Repository record source_url

http://www.ub.uni-heidelberg.de/archiv/3758

OAI identifier oai:identifier

oai:archiv.ub.uni-heidelberg.de:3758