Berlin 2014 – wissenschaftliches Programm

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UP: Fachverband Umweltphysik

UP 11: Postersession

UP 11.10: Poster

Mittwoch, 19. März 2014, 17:00–18:30, MAG Poster

CO₂ self broadening and line strength measurements in the 2 µm region — •Jens Brunzendorf, Anton Serdyukov, Anne Rausch, Viktor Werwein, Olav Werhahn, and Volker Ebert — Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, 38116 Braunschweig, Germany

CO₂ is one of the most important greenhouse gases. It is frequently monitored via satellites and ground-based stations using e.g. Fourier Transform Infrared (FTIR) spectrometers, often in the 2 µm region. Absolute CO₂ concentration retrievals can be improved with enhanced CO₂ spectral line parameters, which are preferably traceable to national standards.
Based on an FTIR instrumentation which has been setup in the framework of the European Metrology Programme (EMRP) we present measurements of CO₂ line parameters in the 2 µm wavelength region. We address the standardization of line data measurements and their uncertainty assessments facilitating measurements of spectral line data under well controlled conditions with traceable instruments. In particular, we present the FTIR spectrometer, the data reduction as well as the CO₂ spectra of the three bands around 2 µm. Retrieved self broadening coefficients and line strength data will be presented.
Acknowledgement: This work was performed within the European joint research project EUMETRISPEC (www.eumetrispec.org) funded by the EMRP. The EMRP is jointly funded by the EMRP participating countries within EURAMET and the European Union.