An upper limit on the HCl near-surface mixing ratio over the Atlantic measured using TDLAS |
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| Authors: | G W Harris D Klemp T Zenker |
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| Institution: | (1) Max Planck Institute for Chemistry, PO Box 3060, D6500 Mainz, Germany;(2) Present address: KFA Jülich, ICH2, D5170 Jülich, Germany |
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| Abstract: | A study of the gas phase mixing ratio of hydrochloric acid was made during the 1988 Polarstern expedition using tunable diode laser absorption spectroscopy (TDLAS). The measurements were made 22 m above sea level at 28° N, 30° W. The signal-to-noise ratio was unity for <50 pptv HCl, but because of wall effects in the sampling system, only an upper limit for the HCl mixing ratio of <250 pptv can be stated. |
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| Keywords: | Hydrochloric acid chlorine cycle maritime troposphere TDLAS boundary layer |
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