Articles | Volume 14, issue 5
https://doi.org/10.5194/amt-14-3597-2021
https://doi.org/10.5194/amt-14-3597-2021
Research article
 | 
19 May 2021
Research article |  | 19 May 2021

In situ observations of stratospheric HCl using three-mirror integrated cavity output spectroscopy

Jordan Wilkerson, David S. Sayres, Jessica B. Smith, Norton Allen, Marco Rivero, Mike Greenberg, Terry Martin, and James G. Anderson

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Cited articles

Ackerman, M., Frimout, D., Girard, A., Gottignies, M., and Muller, C.: Stratospheric HCl from infrared spectra, Geophys. Res. Lett., 3, 81–83, https://doi.org/10.1029/GL003i002p00081, 1976. 
Allen, N.: nthallen/icosfit: icosfit V4.2.5 (Version V4.2.5), Zenodo, https://doi.org/10.5281/zenodo.3903723, 2020. 
Anderson, J. G., Wilmouth, D. M., Smith, J. B., and Sayres, D. S.: UV Dosage levels in summer: Increased risk of ozone loss from convectively injected water vapor, Science, 337, 835–839, https://doi.org/10.1126/science.1222978, 2012. 
Anderson, J. G., Weisenstein, D. K., Bowman, K. P., Homeyer, C. R., Smith, J. B., Wilmouth, D. M., Sayres, D. S., Klobas, J. E., Leroy, S. E., Dykema, J. A., and Wofsy, S. C.: Stratospheric ozone over the United States in summer linked to observations of convection and temperature via chlorine and bromine catalysis, P. Natl. Acad. Sci. USA, 114, E4905–E4913, https://doi.org/10.1073/pnas.1619318114, 2017. 
Bonne, G. P., Stimpfle, R. M., Cohen, R. C., Voss, P. B., Perkins, K. K., Anderson, J. G., Salawitch, R. J., Elkins, J. W., Dutton, G. S., Jucks, K. W., and Toon, G. C.: An examination of the inorganic chlorine budget in the lower stratosphere, J. Geophys. Res.-Atmos., 105, 1957–1971, https://doi.org/10.1029/1999JD900996, 2000. 
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Short summary
The ozone layer in the stratosphere protects life from harmful UV light, but chlorine-based pollution threatens to damage it. We developed an instrument that couples a laser with highly reflective mirrors and advanced electronics to measure an important residue of this pollution: hydrogen chloride. Our instrument has an improved, more modern layout that we successfully tested in flight. This paves the way for future, advanced techniques that seek to evaluate the health of Earth’s ozone layer.
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