 |
| Titel |
Comparison of three vertically resolved ozone data sets: climatology, trends and radiative forcings |
| VerfasserIn |
B. Hassler, P. J. Young, R. W. Portmann, G. E. Bodeker, J. S. Daniel, K. H. Rosenlof, S. Solomon |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7316
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 13, no. 11 ; Nr. 13, no. 11 (2013-06-06), S.5533-5550 |
| Datensatznummer |
250018687
|
| Publikation (Nr.) |
 copernicus.org/acp-13-5533-2013.pdf |
|
|
|
|
|
| Zusammenfassung |
| Climate models that do not simulate changes in stratospheric ozone
concentrations require the prescription of ozone fields to accurately
calculate UV fluxes and stratospheric heating rates. In this study, three
different global ozone time series that are available for this purpose are
compared: the data set of Randel and Wu (2007) (RW07), Cionni et al. (2011)
(SPARC), and Bodeker et al. (2013) (BDBP). All three data sets represent
multiple-linear regression fits to vertically resolved ozone observations,
resulting in a spatially and temporally continuous stratospheric ozone field
covering at least the period from 1979 to 2005. The main differences among
the data sets result from regression models, which use different observations
and include different basis functions. The data sets are compared against
ozonesonde and satellite observations to assess how the data sets represent
concentrations, trends and interannual variability. In the Southern
Hemisphere polar region, RW07 and SPARC underestimate the ozone depletion in
spring ozonesonde measurements. A piecewise linear trend regression is
performed to estimate the 1979–1996 ozone decrease globally, covering a
period of extreme depletion in most regions. BDBP overestimates Arctic and
tropical ozone depletion over this period relative to the available
measurements, whereas the depletion is underestimated in RW07 and SPARC.
While the three data sets yield ozone concentrations that are within a range
of different observations, there is a large spread in their respective ozone
trends. One consequence of this is differences of almost a factor of four in
the calculated stratospheric ozone radiative forcing between the data sets
(RW07: −0.038 Wm−2, SPARC: −0.033 Wm−2, BDBP:
−0.119 Wm−2), important in assessing the contribution of
stratospheric ozone depletion to the total anthropogenic radiative forcing. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|