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| Titel |
Estimation of Antarctic ozone loss from ground-based total column measurements |
| VerfasserIn |
J. Kuttippurath, F. Goutail, J.-P. Pommereau, F. Lefèvre, H. K. Roscoe, A. Pazmino, W. Feng, M. P. Chipperfield, S. Godin-Beekmann |
| 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. 14 ; Nr. 10, no. 14 (2010-07-16), S.6569-6581 |
| Datensatznummer |
250008637
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| Publikation (Nr.) |
 copernicus.org/acp-10-6569-2010.pdf |
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| Zusammenfassung |
The passive tracer method is used to estimate
ozone loss from ground-based measurements in
the Antarctic. A sensitivity study shows that
the ozone depletion can be estimated within an
accuracy of ~4%. The method is then
applied to the ground-based observations from
Arrival Heights, Belgrano, Concordia, Dumont d'Urville,
Faraday, Halley, Marambio, Neumayer, Rothera,
South Pole, Syowa, and Zhongshan for the diagnosis
of ozone loss in the Antarctic. On average, the
ten-day boxcar average of the vortex mean ozone
column loss deduced from the ground-based
stations was about 55±5% in 2005–2009.
The ozone loss computed from the ground-based
measurements is in very good agreement
with those derived from satellite measurements
(OMI and SCIAMACHY) and model simulations
(REPROBUS and SLIMCAT), where the differences
are within ±3–5%.
The historical ground-based total ozone
observations in October show that the depletion
started in the late 1970s, reached a maximum in
the early 1990s and stabilised afterwards due to
saturation. There is no indication of ozone
recovery yet. At southern mid-latitudes, a
reduction of 20–50% is observed for a few
days in October–November at the newly installed
Rio Gallegos station. Similar depletion of ozone
is also observed episodically during the vortex
overpasses at Kerguelen in October–November and
at Macquarie Island in July–August of the recent
winters. This illustrates the significance of
measurements at the edges of Antarctica. |
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