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Journal Article

An improved fast-response vacuum-uv resonance fluorescence CO instrument

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Gerbig, C., Schmitgen, S., Kley, D., Volz-Thomas, A., Dewey, K., & Haaks, D. (1999). An improved fast-response vacuum-uv resonance fluorescence CO instrument. Journal of Geophysical Research: Atmospheres, 104(D1), 1699-1704. doi:10.1029/1998JD100031.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002A-D650-5
The fast-response resonance fluorescence instrument for the airborne measurement of carbon monoxide described by Gerbig er al. [1996] was modified by implementing an improved optical filter with more efficient optics and an optimized resonance lamp. Besides reductions in size and weight, the new instrument achieves a sensitivity 10 times higher, a lower background (65 ppb compared with 250 ppb), and a faster time response (<0.1s) than the original instrument. The precision is +/-1.5 ppb at an atmospheric mixing ratio of 100 ppb CO, and the detection limit is 3 ppb (2 sigma) for an integration time of 1 s. First results from the North Atlantic Regional Aerosol Characterization Experiment (ACE-2) campaign during July 1997, when the new instrument was deployed aboard the U.K. Meteorological Office C-130 aircraft, are used to demonstrate the performance of the new instrument.