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The objectives are:
To quantify the chemically-induced ozone loss as a fonction of time inside the Arctic vortex each winter.
Transport model method
Comparison between measurements and 3-D CTMs in which ozone is considered as a passive tracer
This page contains recent, preliminary
results for winter 2010/2011. Contact Dr. Florence GOUTAIL for more details and requests.
1. Total ozone from the Ground-based UV-Visible SAOZ Spectrometers.
| Station# | Station | Instrument | Latitude | Longitude | PI |  |
| 1 | Eureka | SAOZ | 80 N | 86 W | CNRS/UoT | |
| 2 | Ny-Alesund | SAOZ | 78 N | 12 E | NILU | |
| 3 | Thule | SAOZ | 76 N | 69 W | DMI | |
| 4 | Scoresbysund | SAOZ | 70 N | 22 W | CNRS/DMI | |
| 5 | Sodankylä | SAOZ | 67 N | 27 E | CNRS/FMI | |
| 6 | Zhigansk | SAOZ | 67 N | 123 E | CNRS/CAO | |
| 7 | Salekhard | SAOZ | 67 N | 67 E | CNRS/CAO | |
| 8 | Harestua | UV-Visible | 60 N | 11 E | IASB |
2. Transport models
- 3-D CTM REPROBUS and SLIMCAT
Record O3 loss in 2010/2011 - Preliminary
1. Minimum ECMWF temperature at 475K
(red) and 550K (blue)
- Temperature below PSC formation (194 K) since December
- Minor warming in early January, early February and early March
- Final warming in progress
3. Cumulative ozone loss above
SAOZ stations
- Total ozone reduction on March 30 : 39 % + 2 %.
- Loss rate: 0.2 % /day until mid-February, 0.8 % /day after mid-February
4. Comparison to photochemical model simulations
SAOZ : 39 % or 150 DU
REPROBUS : 30 % or 120 DU
SLIMCAT : 47 % or 170 DU
Comparison to previous years - Preliminary
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1 - ECMWF Temperatures 2011 is the coldest and longest winter after February 20 in 18 years |
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| 2 - Temperatures and O3 loss since 1994: Left: minimum ECMWF temperature at 475 K (red) and 550K (blue) north of 30°N and limits for NAT PSC formation. Right: Total ozone reduction in the vortex from the SAOZ network (shaded pink). |
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3 - Summary of yearly O3 loss since 1994 |
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| 4 - Comparison with Antarctica |
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