Simultaneous detection of OClO and ClO using Odin

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Simultaneous detection of OClO and ClO using Odin
P.Krecl, C.S. Haley, J.Stegman, S.M.Brohede and
G. Berthet
Patricias licenciate thesis, now in print in
ACP
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OClO as an indicator of chlorine activation

• ClO BrO ? OClO Br (1)
• ClO BrO ? BrCl O2 (2)
• ClO BrO ? Br Cl O2 (3)
• Br O3 ? BrO O2 (4)
• in twilight OClO depends linearily on both ClO
  and BrO
• for SZA gt 92 BrO is tied up as BrCl and OClO
  becomes pseudo zero order in ClO

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Sessler et al, GRL, 22, 6, 687 (1995)
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Schiller and Wahner, GRL, 23, 9, 1053 (1996)
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Left panel OClO averaging kernel functions,
measurement response w (dashed line), and w0.7
(dashed-dotted line) for limb spectra measured on
19 September 2002 (scan 8567045, latitude 83.9 S,
longitude 18.5W, SZA 91, SSA 72, 1744 LST). lc
was set to 4 km and to 300. Middle panel
spread s. Right panel OClO number density
errors retrieval noise Sm, smoothing error Ss,
and retrieval error
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OSIRIS OClO profile (20020919, scan 8565047,
latitude 81.7 S, longitude 36.4 E, SZA 92.0,
1810 LST), and the coincident profile calculated
by REPROBUS model (SZA 92.2).
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Sessler et al, GRL, 22, 6, 687 (1995)
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Summary

• OClO vertical profiles can be retrieved for a
  single limb scan in the regions where chlorine is
  activated.
• OClO ClO on-going and promising