BAS ozone bulletin 06/95 issued 1995 Oct 2.

Preliminary ozone values from the British Antarctic
Survey Faraday station (65 south, 64 west on the coast of
the Antarctic Peninsula) show mean ozone values dropping
from values of around 290 Dobson Units (DU) at the
beginning of August to around 190 DU by the end of
September (40% depletion).  Values are generally similar
to those reached in 1993 and 1994.  Planetary wave
activity as the edge of the ozone hole passes over the
station is giving day to day variation of around 60 DU.
Data from our long term record for the station indicate
normal values of around 330 DU for the end of September
(with a range of 280 DU to 470 DU).

Faraday preliminary mean daily total ozone (DU)

1995 Aug 1 - Sept 28

 306 272 276 265 289 333 307 277 241 229
 235 218 213 217 277 278 280 268 219 224
 232 237 226 214 201 210 205 232 218 208 223
 207 203 204 243 201 196 184 186 189 153
 194 272 247 220 269 228 167 206 159 142
 140 216 198 175 242 204 159 155


Preliminary ozone measurements from the British Antarctic
Survey Halley station (76 south, 26 west on the Brunt ice
shelf) show that mean total ozone values have dropped
from around 250 DU at the beginning of August to 130 DU
at the end of September (55% depletion).  Ozone values
are now similar to those at the same time last year.  Day
to day variation is around 15 DU.  Data from our long
term record for the station indicate normal values of
around 300 DU for the end of September (with a range of
260 DU to 340 DU).  100 hPa temperatures (near the peak
of the ozone layer) are now a little below normal, at
around -82xC, and stratospheric clouds are expected to be
present.

Halley preliminary mean daily total ozone, (DU)
(0 indicates no data)

1995 Aug 1 - Oct 1

   0   0   0   0   0   0   0 221 228 231
 248 244   0   0   0   0   0   0   0   0
   0   0   0   0   0   0 202 215 187 215 229
 199 204 225 217 224 205 213 189 183 206
 210 167 188 187 180 160 141 155 160 142
 133 137 141 116 121 133 126 135 117 120
 123

TOVS satellite images from the US NCEP/NWS/NOAA Climate
Prediction Center show that ozone depletion has
intensified over the past month, with the ozone "hole"
now covering most of the Antarctic continent and centred
close to the south pole.  The hole is slightly elongated
towards the Atlantic region and the axis of elongation is
rotating around the Antarctic continent with a period of
about a month.  This rotation of the "hole" gives rise to
the variation in ozone amount seen at Faraday, which is
located close to the edge of the hole.

If you use or pass on this data please make
acknowledgement to J D Shanklin, British Antarctic
Survey.

Regards, Jon Shanklin