Hamburg 2009 – wissenschaftliches Programm

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UP: Fachverband Umweltphysik

UP 2: Atmosphäre II

UP 2.9: Vortrag

Dienstag, 3. März 2009, 15:54–16:06, VMP 9 HS

An ICOS laser spectrometer for the measurement of CH₄ and CO₂ onboard a passenger aircraft (project CARIBIC) — •Lisa Kattner, Christoph Dyroff, and Andreas Zahn — Institut für Meteorologie und Klimaforschung, Karlsruhe Institute of Technology (KIT)

The flying laboratory CARIBIC (Civil Aircraft for Regular Investigation of the Atmosphere Based on an Instrument Container) has now successfully been running for more than 10 years, and is in its second stage of application onboard a Lufthansa Airbus A340-600. It has already delivered a vast and valuable variety of data concerning atmospheric gases and aerosol particles. Here we present a new system that measures methane (CH₄) and carbon dioxide (CO₂) by using off-axis integrated cavity output spectroscopy (ICOS). It is currently reconstructed to fulfil aircraft requirements. Measurement principles as well as instrument design and performance are described. Measurements of methane concentrations will be of special interest concerning the actual flight route of the CARIBIC passenger aircraft to Chennai (formerly Madras), southern India, which crosses one of the world’s most extensive rice producing areas and thus, largest emitter of the third most important greenhouse gas.