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| Titel |
Technical Note: Ozonesonde climatology between 1995 and 2011: description, evaluation and applications |
| VerfasserIn |
S. Tilmes, J.-F. Lamarque, L. K. Emmons, A. Conley, M. G. Schultz, M. Saunois, V. Thouret, A. M. Thompson, S. J. Oltmans, B. Johnson, D. Tarasick |
| 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 ; 12, no. 16 ; Nr. 12, no. 16 (2012-08-17), S.7475-7497 |
| Datensatznummer |
250011398
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| Publikation (Nr.) |
 copernicus.org/acp-12-7475-2012.pdf |
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| Zusammenfassung |
| An ozone climatology based on ozonesonde measurements taken over the last
17 yr has been constructed for model evaluation and comparisons to other
observations. Vertical ozone profiles for 42 stations around the globe have
been compiled for the period 1995–2011, in pressure and
tropopause-referenced altitudes. For each profile, the mean, standard
deviation, median, the half-width are provided, as well as information about
interannual variability. Regional aggregates are formed in combining stations
with similar ozone characteristics. The Hellinger distance is introduced as a
new diagnostic to identify stations that describe similar shapes of ozone
probability distribution functions (PDFs). In this way, 12 regions were
selected covering at least 2 stations and the variability among those
stations is discussed. Significant variability with longitude of ozone
distributions in the troposphere and lower stratosphere in the northern mid-
and high latitudes is found. The representativeness of regional aggregates is
discussed for high northern latitudes, Western Europe, Eastern US, and Japan,
using independent observations from surface stations and MOZAIC aircraft
data. Good agreement exists between ozonesondes and aircraft observations in
the mid-troposphere and between ozonesondes and surface observations for
Western Europe. For Eastern US and high northern latitudes, surface ozone
values from ozonesondes are biased 10 ppb high compared to independent
measurements. An application of the climatology is presented using the NCAR
CAM-Chem model. The climatology allows evaluation of the model performance
regarding ozone averages, seasonality, interannual variability, and the shape
of ozone distributions. The new assessment of the key features of ozone
distributions gives deeper insights into the performance of models. |
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