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| Titel |
Validation of Ozone Monitoring Instrument (OMI) ozone profiles and stratospheric ozone columns with Microwave Limb Sounder (MLS) measurements |
| VerfasserIn |
X. Liu, P. K. Bhartia, K. Chance, L. Froidevaux, R. J. D. Spurr, T. P. Kurosu |
| 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 ; 10, no. 5 ; Nr. 10, no. 5 (2010-03-12), S.2539-2549 |
| Datensatznummer |
250008186
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| Publikation (Nr.) |
 copernicus.org/acp-10-2539-2010.pdf |
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| Zusammenfassung |
| We validate OMI ozone profiles between 0.22–215 hPa and stratospheric ozone
columns down to 215 hPa (SOC215) against v2.2 MLS data from 2006. The
validation demonstrates convincingly that SOC can be derived accurately from
OMI data alone, with errors comparable to or smaller than those from current
MLS retrievals, and it demonstrates implicitly that tropospheric ozone
column can be retrieved accurately from OMI or similar nadir-viewing
ultraviolet measurements alone. The global mean biases are within 2.5%
above 100 hPa and 5–10% below 100 hPa; the standard deviations of the
differences (1σ) are 3.5–5% between 1–50 hPa, 6–9% above 1 hPa
and 8–15% below 50 hPa. OMI shows some latitude and solar zenith angle
dependent biases, but the mean biases are mostly within 5% and the
standard deviations are mostly within 2–5% except for low altitudes and
high latitudes. The excellent agreement with MLS data shows that OMI
retrievals can be used to augment the validation of MLS and other
stratospheric ozone measurements made with even higher vertical resolution
than that for OMI. OMI SOC215 shows a small bias of −0.6% with a
standard deviation of 2.8%. When compared as a function of latitude and
solar zenith angle, the mean biases are within 2% and the standard
deviations range from 2.1 to 3.4%. Assuming 2% precision for MLS
SOC215, we deduce that the upper limits of random-noise and smoothing errors
for OMI SOC215 range from 0.6% in the southern tropics to 2.8% at
northern middle latitudes. |
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