Development and application of multilaser TDLAS instruments for ground-based, shipboard, and airborne measurements of trace gas species in the atmosphere

Horst Fischer; Peter Bergamaschi; Frank G. Wienhold; J. Thomas Zenker; Geoff W. Harris

doi:10.1117/12.255318

21 October 1996 Development and application of multilaser TDLAS instruments for ground-based, shipboard, and airborne measurements of trace gas species in the atmosphere

Horst Fischer, Peter Bergamaschi, Frank G. Wienhold, J. Thomas Zenker, Geoff W. Harris

Author Affiliations +

Proceedings Volume 2834, Application of Tunable Diode and Other Infrared Sources for Atmospheric Studies and Industrial Process Monitoring; (1996) https://doi.org/10.1117/12.255318
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

Abstract

Tunable diode laser absorption spectroscopy (TDLAS) meets the major requirements for atmospheric trace gas monitoring, which are sub-ppbv sensitivity, high detection speed and the potential for simultaneous in-situ measurements of several compounds. In recent years, several multi-laser TDLAS systems have been developed at the Max Planck Institute for Chemistry and used in a number of ground based, shipboard and airborne field campaigns to measure the concentrations of atmospheric trace species, e.g. N₂O, CH₄, CO, HCHO, H₂O₂ and NO₂, from the boundary layer up to the lower stratosphere at 14 km altitude. During these field measurement on various platforms, detailed comparisons of TDLAS with other techniques have been performed for CO, HCHO, and NO₂, yielding an agreement between the various instruments on the order of 10-20 percent. In addition, a TDLAS instrument has been used to measure N₂O fluxes from soils by eddy correlation and flux gradient techniques. A particular TDLAS instrument has been developed, which is capable of high-precision direct measurements of ¹³CH₄/¹²CH₄ and ¹²CH₃D/¹²CH₄ ratios. An intercomparison between this instrument and conventional mass spectrometry yielded a mean deviation of (delta) ¹³C equals 0.5 percent and (delta) D equals 5 percent.

Citation Download Citation

Horst Fischer, Peter Bergamaschi, Frank G. Wienhold, J. Thomas Zenker, and Geoff W. Harris "Development and application of multilaser TDLAS instruments for ground-based, shipboard, and airborne measurements of trace gas species in the atmosphere", Proc. SPIE 2834, Application of Tunable Diode and Other Infrared Sources for Atmospheric Studies and Industrial Process Monitoring, (21 October 1996); https://doi.org/10.1117/12.255318

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