 |
| Titel |
Development of a climate record of tropospheric and stratospheric column ozone from satellite remote sensing: evidence of an early recovery of global stratospheric ozone |
| VerfasserIn |
J. R. Ziemke, S. Chandra |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7316
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 12, no. 13 ; Nr. 12, no. 13 (2012-07-03), S.5737-5753 |
| Datensatznummer |
250011296
|
| Publikation (Nr.) |
 copernicus.org/acp-12-5737-2012.pdf |
|
|
|
|
|
| Zusammenfassung |
| Ozone data beginning October 2004 from the Aura Ozone
Monitoring Instrument (OMI) and Aura Microwave Limb Sounder (MLS) are used
to evaluate the accuracy of the Cloud Slicing technique in effort to develop
long data records of tropospheric and stratospheric ozone and for studying
their long-term changes. Using this technique, we have produced a 32-yr
(1979–2010) long record of tropospheric and stratospheric column ozone from
the combined Total Ozone Mapping Spectrometer (TOMS) and OMI. Analyses of
these time series suggest that the quasi-biennial oscillation (QBO) is the
dominant source of inter-annual variability of stratospheric ozone and is
clearest in the Southern Hemisphere during the Aura time record with related
inter-annual changes of 30–40 Dobson Units. Tropospheric ozone for the long
record also indicates a QBO signal in the tropics with peak-to-peak changes
varying from 2 to 7 DU. The most important result from our study is that
global stratospheric ozone indicates signature of a recovery occurring with
ozone abundance now approaching the levels of year 1980 and earlier. The
negative trends in stratospheric ozone in both hemispheres during the first
15 yr of the record are now positive over the last 15 yr and with
nearly equal magnitudes. This turnaround in stratospheric ozone loss is
occurring about 20 yr earlier than predicted by many chemistry climate
models. This suggests that the Montreal Protocol which was first signed in
1987 as an international agreement to reduce ozone destroying substances is
working well and perhaps better than anticipated. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|