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AGU: Geophysical Research Letters

 

Keywords

  • atmospheres
  • trend
  • spectroscopy

Index Terms

  • Atmospheric Composition and Structure: Constituent sources and sinks
  • Atmospheric Composition and Structure: Evolution of the atmosphere
  • Atmospheric Composition and Structure: Radiation: transmission and scattering
  • Atmospheric Composition and Structure: Volcanic effects
  • Atmospheric Composition and Structure: Instruments and techniques

Abstract

GEOPHYSICAL RESEARCH LETTERS, VOL. 34, L16805, 2 PP., 2007
doi:10.1029/2007GL030123

Thirty-five year trend of hydrogen chloride amount above Kitt Peak, Arizona

L. Wallace

National Optical Astronomy Observatories, Tucson, Arizona, USA

W. C. Livingston

National Solar Observatory, Tucson, Arizona, USA

We have analysed solar spectra obtained with the McMath-Pierce telescope on Kitt Peak, Arizona, for column amount of HCl for the period Sept. 1971 through Feb. 2007 using the absorption line at 3.4168 μm. In addition to the previously well-established increase in amount from 1971 to ∼1993 and a plateau between ∼1993 and ∼1997, we now see a definite decrease from ∼1997 to 2007.

Received 11 June 2007; accepted 20 July 2007; published 17 August 2007.

Citation: Wallace, L., and W. C. Livingston (2007), Thirty-five year trend of hydrogen chloride amount above Kitt Peak, Arizona, Geophys. Res. Lett., 34, L16805, doi:10.1029/2007GL030123.

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