Total Ozone Thickness 1997

file dobson97.html with 1997 data

look at dobson98.html for 1998 data


The total thickness of the (stratospheric) ozone layer is measured at unspecified, irregular intervals using the handheld Microtops II sensor manufactured by Solar Light Company of Philadelphia. This instrument measures the thickness of the ozone layer by computing the ratios of UVB irradiances measured at three different wavelengths, taking into account the water vapour content of the atmosphere, which is also measured by the instrument.
The measurement results are given in DU (Dobson Unit). 100 DU correspond to a total thickness of 1 mm, if the ozone layer were at a standard atmospheric presssure of 1013.25 [HPa]. Common values are in the 250..350 DU range.
Look for other total ozone measurements at the site of the Adeos Satellite, at the Climate Prediction Center (NOAA) total ozone maps of the whole earth and the polar caps, or at the Royal Meteorological Institute of Belgium which all display near-live or very recent data.


The Adeos spacecraft has been definitively lost since June 30 1997. ADEOS Ozone measurements are not available anymore! Look at the NASA EP site for O3 data!


The coordinates of DIEKIRCH are:
latitude = 4952' North longitude = 610' East altitude = 218 m a.s.l.

NEW: a first intercomparison between the ozone measurements of the Microtops II and those made by the Brewer instrument at the RMI at Uccle!

Location Date UTC Time Thickness in DU Sky Condition
Diekirch 13 Dec 97 12:25 278.3 hazy
Diekirch 05 Dec 97 11:22 289.9 light haze
Diekirch 29 Nov 97 12:21 298.8 hazy clouds
Diekirch 26 Nov 97 12:03 282.8 partially cloudy, light haze
Diekirch 25 Nov 97 12:35 299.5 strong haze
Diekirch 19 Nov 97 11:22 273.6 blue sky, light haze
Diekirch 17 Nov 97 11:45 281.1 blue sky, light haze
Diekirch 08 Nov 97 11:32 276.9 many clouds, blue patches
Diekirch 23 Oct 97 12:08 258.7 blue sky
Diekirch 22 Oct 97 11:21 271.6 blue sky
Diekirch 21 Oct 97 11:20 286.0 blue sky with hazy clouds
Diekirch 19 Oct 97 13:32 292.4 blue sky
Diekirch 18 Oct 97 12:05 277.4 blue sky
Diekirch 12 Oct 97 09:50 287.8 blue sky with clouds
Diekirch 10 Oct 97 14:21 266.2 blue sky
Diekirch 07 Oct 97 11:07 281.9 blue sky with heavy clouds
Diekirch 06 Oct 97 10:45 262.7 sun with light haze
Diekirch 05 Oct 97 13:57 245.5 light haze
Diekirch 04 Oct 97 11:15 262.9 sun with heavy clouds
Diekirch 01 Oct 97 12:05 269.3 blue sky with many clouds
Diekirch 30 Sep 97 12:10 253 hazy cloud-cover, take results w. caution!
Diekirch 27 Sep 97 12:10 268 blue sky
Diekirch 23 Sep 97 11:16 300 blue sky
Diekirch 20 Sep 97 12:00 281 blue sky
Diekirch 16 Sep 97 12:00 307 blue sky with some clouds
Diekirch 15 Sep 97 11:45 303 blue sky with some haze
Diekirch 14 Sep 97 10:25 315 blue sky with heavy clouds
Diekirch 10 Sep 97 12:00 263 blue sky with some haze
Diekirch 08 Sep 97 15:00 263 blue sky
Diekirch 01 Sep 97 11:55 291 blue sky with some clouds
Diekirch 19 July 97 12:13 361 many clouds
Diekirch 16 July 97 12:00 323 many clouds, slight haze
Diekirch 13 July 97 12:00 335 Blue sky, clouds, slight haze
Diekirch 04 July 97 11:57 353 heavy clouds, blue patches
Diekirch 28 June 97 12:55 353 clouds, only a few blue patches
Diekirch 19 June 97 10:15 352 many clouds
Diekirch 18 June 97 14:45 338 patchy blue with many clouds
Diekirch 18 June 97 07:40 379 blue sky, very light haze
Diekirch 16 June 97 11:30 338 blue sky, some hazy clouds
Diekirch 13 June 97 12:00 333 A few blue patches, many clouds
Diekirch 10 June 97 12:20 329 blue sky with a few clouds
Diekirch 05 June 97 12:05 335 blue sky with some clouds
Diekirch 04 June 97 12:15 357 blue sky with large cumuli
Diekirch 31 May 97 12:00 356 blue sky, very slight partial haze
Diekirch 30 May 97 09:50 340 blue sky, slight haze
Diekirch 27 May 97 14:05 327 blue sky with many clouds
Diekirch 15 May 97 11:58 360 blue sky, some very slight hazy clouds
Diekirch 03 May 97 11:42 315 blue sky, no clouds
Diekirch 02 May 97 13:22 282 blue sky, no clouds
Diekirch 24 April 97 12:42 335 blue sky with hazy clouds
Diekirch 21 Apri 97 12:06 327 blue sky, very few clouds
Diekirch 17 April 97 11:43 374 blue sky, some clouds
Diekirch 27 March 97 12:07 301 blue sky, many clouds
Diekirch 22 March 97 12:19 360 blue sky
Diekirch 12 March 97 12:11 290 blue sky, slight haze, sunny
Diekirch 11 Mar 97 12:02 287 clear blue sky, sunny
Diekirch 10 Mar 97 12:03 278 clear blue sky, sunny
Diekirch 09 Mar 97 09:35 303 clear blue sky, sunny




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