Dissertation / PhD Thesis/Book

PreJuSER-17038

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Entwicklung und Erprobung des Hygrometer for Atmospheric Investigations

Klostermann, T. (Corresponding author)FZJ*

2011
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag Jülich
ISBN: 978-3-89336-723

Please use a persistent id in citations: http://hdl.handle.net/2128/4451

Abstract: The purposse of this thesis is the development and proving of a high precision in-situ hygrometer for the research airplane $\textbf{HALO}$ which uses the Tunable Diode Laser Absorption Spectroscopy. To provide tropospheric and stratospheric measurements between $\textbf{2 ppmv}$ and $\textbf{10000 ppmv}$ two different lasers are implemented: One for high mixing ratios up to $\textbf{10000 ppmv}$ in the $\textbf{1,4 $\mu$ m}$ absorption band of the wate molecule and one for low mixingratios between $\textbf{2 ppmv}$ and $\textbf{400 ppmv}$ in the $\textbf{2,6 $\mu$m}$ ground vibrational band. For noncontact measurements of gas phase water an open path cell with two absorption paths has been developed. In contrast to the common Herriott setup of a cell with multiple absorption paths this cell has been designed as a White cell to include a direct fiber coupling. By using a computational based optimization for the optical absorption pths the disruptive interfering effects could be reduced below a level of $\textbf{266 ppmv}$ which is given by the used lasers. Due to the technical difficulties by [...]

Note: Record converted from JUWEL: 18.07.2013; Record converted from VDB: 12.11.2012
Note: Universität Wuppertal, Diss., 2011

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Contributing Institute(s):

1. Stratosphäre (IEK-7)

Research Program(s):

1. Atmosphäre und Klima (P23)

Appears in the scientific report 2011

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Database coverage:

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