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| Titel |
Re-analysis of ground-based microwave ClO measurements from Mauna Kea, 1992 to early 2012 |
| VerfasserIn |
B. J. Connor, T. Mooney, G. E. Nedoluha, J. W. Barrett, A. Parrish, J. Koda, M. L. Santee, R. M. Gomez |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 13, no. 17 ; Nr. 13, no. 17 (2013-09-02), S.8643-8650 |
| Datensatznummer |
250085663
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| Publikation (Nr.) |
 copernicus.org/acp-13-8643-2013.pdf |
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| Zusammenfassung |
| We present a re-analysis of upper stratospheric ClO measurements from the
ground-based millimeter-wave instrument from January 1992 to February 2012.
These measurements are made as part of the Network for the Detection of
Atmospheric Composition Change (NDACC) from Mauna Kea, Hawaii,
(19.8° N, 204.5° E). Here, we use daytime and nighttime
measurements together to form a day–night spectrum, from which the difference
in the day and night profiles is retrieved. These results are then compared
to the day–night difference profiles from the Upper Atmosphere Research Satellite (UARS)
and Aura Microwave Limb Sounder (MLS) instruments. We also compare them to our previous analyses of
the same data, in which we retrieved the daytime ClO profile. The major focus
will be on comparing the year-to-year and long-term changes in ClO derived by
the two analysis methods, and comparing these results to the long-term
changes reported by others. We conclude that the re-analyzed data set has
less short-term variability and exhibits a more constant long-term trend
that is more consistent with other observations. Data from 1995 to 2012
indicate a linear decline of mid-stratospheric ClO of
0.64 ± 0.15% yr−1 (2σ). |
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