High concentrations of chlorine monoxide at low altitudes in the Antarctic spring stratosphere: secular variation

  title={High concentrations of chlorine monoxide at low altitudes in the Antarctic spring stratosphere: secular variation},
  author={Philip Myron Solomon and Brian J. Connor and Robert L. de Zafra and Alan Parrish and James Barrett and Mauricio Jaramillo},
We have reported the observation of millimetre-wave emission from abnormally high concentrations of chlorine monoxide, ClO, in the lower stratosphere over McMurdo Station, Antarctica during the period 1–22 September 1986 and demonstrated1 its diurnal behaviour. Here we report on the secular variation of daytime ClO in the lower stratosphere with a time resolution of 4 or 5 days, during the period 1 September to 16 October. We show that the ClO concentration declines during the latter half of… 
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