Prepared by F. Goutail, CNRS-SA, Verrières Le Buisson, France.

Measurements

1. Total ozone measurements from the European network of Ground-based UV-Visible Spectrometers.

Station#	Station name	Instrument	Latitude	Longitude
1	Ny-Alesund	SAOZ	78 N	12 E
2	Thule	SAOZ	76 N	69 W
3	Scoresbysund	SAOZ	70 N	22 W
4	Andoya	UV-Visible	69 N	19 E
9	Sodankylä	SAOZ	67 N	27 E
6	Zhigansk	SAOZ	67 N	123 E
7	Salekhard	SAOZ	67 N	67 E
8	Harestua	UV-Visible	60 N	11 E
9	Aberystwyth	SAOZ	52 N	4 W
10	Jungfraujoch	SAOZ	47 N	8 E
11	OHP France	SAOZ	44 N	6 E

2. Ballon measurement of ozone and inert tracer profiles (CFC-11, CFC-12, CH4).

Regular flights in the Arctic:

Flight #	Date	Launching site	Instrumentation	Observation
67	29/01/98	Andoya (Norway)	SAOZ	Balloon failure 1 000 m
68	31/01/98	Andoya (Norway)	SAOZ
70	02/03/98	Andoya (Norway)	SAOZ + SAOZ BrO
72	20/03/98	Andoya (Norway)	SAOZ + Descartes + SAOZ BrO	Balloon failure 5 000 m
80	17/11/98	Andoya (Norway)	SAOZ + Descartes
82	27/01/99	Kiruna (Sweden)	SAOZ + BrO + Descartes
83	06/02/99	Kiruna (Sweden)	SAOZ + BrO+ CH4
84	18/02/99	Kiruna (Sweden)	SAOZ + Descartes + CH4
90	17/11/99	Andoya (Norway)	SAOZ + Descartes
91	28/01/00	Kiruna (Sweden)	SAOZ + Descartes + CH4 + Bro
93	13/02/00	Kiruna (Sweden)	SAOZ + Descartes + CH4 + Bro
94	27/02/00	Kiruna (Sweden)	SAOZ + CH4 + Labs
95	07/03/00	Kiruna (Sweden)	SAOZ + Descartes + Labs + Bro
97	03/04/00	Andoya (Norway)	SAOZ + Descartes

and at mid-latitude or outside vortex:

Flight #	Date	Launching site	Instrumentation	Observation
66	28/01/98	Aire sur l'Adour (France)	SAOZ
69	09/02/98	Aire sur l'Adour (France)	SAOZ
71	13/03/98	LEON (Spain)	SAOZ + Descartes
73	27/03/98	LEON (Spain)	SAOZ + Descartes
74	20/06/98	Gap (France)	SAOZ + Descartes
75	23/06/98	Gap (France)	SAOZ
81	02/12/98	Aire sur l'Adour (France)	SAOZ + BrO + Descartes
85	15/04/99	Aire sur l'Adour (France)	SAOZ + CH4
92	09/02/00	Kiruna (Sweden)	SAOZ + Descartes + CH4 + Bro	Outside Vortex
96	25/03/00	Kiruna (Sweden)	SAOZ + DIRAC + CH4 + Bro	Outside Vortex

3. Other ozone data.

- Dobson WMO
- Brewer GO3OS network

4. Transport model

- 3-D CTM model REPROBUS

Results for 1999/2000 inside Vortex

1. Cumulative ozone loss from SAOZ network
2. Comparison with 3D CTM simulations.

Comparison with previous years Inside Vortex

Cumulative photochemical reduction of total column ozone inside vortex estimated from a study combining ground-based SAOZ UV-Visible spectrometers measurements and atmospheric model results (red hatched area) and from REPROBUS model only (blue solid line). During the last seven winters the losses have varied between 5 and 32%. The loss is larger during winter with low temperatures enabling PSC formation

Results for 1999/2000 outside Vortex

1. Cumulative ozone loss from SAOZ network
2. Comparison with 3D CTM simulations.

Comparison with previous years Outside Vortex

Cumulative photochemical reduction of total column ozone outside vortex estimated from a study combining ground-based SAOZ UV-Visible spectrometers measurements and atmospheric model results (red hatched area) and from REPROBUS model only (blue solid line). During the last seven winters the losses have varied around 10%. The timing of the loss is different from inside vortex and it can start early in the winter suggesting a local destruction and not a leakage of the vortex.

Balloon Flights inside vortex during winter 1999/2000

Ozone evolution since early winter ozone maximum descending inside vortex
NO2 evolution since early winter NO2 recovery starting above 22 km
OClO evolution since early winter no OClO in November

Evolution of the anti-correlation between NO₂ and OClO during the winter

November, no NO2 ; the vortex is not activated: No OClO. January the atmosphere is denoxified and the vortex is activated: high amounts of OClO are observed from 15 to 24 km. Early February, recovery of NO2 at the top of the profile and the vortex is activated: high level of OClO observed but only below 21 km where the atmosphere is denoxified. Early March the vortex is still activated: high amount of OClO are observed. Early April, recovery of NO2; OClO observed below 17 km only.

Early winter flight from Andoya 17/11/1999 Comparison between SAOZ, Alomar Lidar and POAM
Picture gallery
Balloon Launch by Andoya Rocket Range

January flight from Kiruna, 28/01/2000 Picture gallery
SAOZ UV Visible spectrometer, CNRS-SA
Descartes Air sampler, IRF, UCAM
CH4 tunable diode laser, NPL, UCAM
O3 semi-conductor sensors, UCAM
SAOZ-BRO spectrometer + flight train
Swedish light telemetry, Esrange
Launching team