Total Ozone Thickness 1998

file dobson98.html with 1998 data

look at dobson97.html for 1997 data

The complete files with all measurements as they are stored in the Microtops instrument

can be found in the data area under the name of mtopxxyy.dat


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 23 Dec 98 12:03 297.3 light haze
Diekirch 13 Dec 98 13:07 322.5 heavy clouds
Diekirch 26 Nov 98 13:02 319.4 very hazy sky
Diekirch 22 Nov 98 12:40 287.4 blue sky
Diekirch 20 Nov 98 12:30 313.7 bkue sky, some haze
Diekirch 19 Nov 98 11:58 319.6 blue sky
Diekirch 17 Nov 98 12:24 343.6 many clouds
Diekirch 14 Nov 98 12:56 324.9 blue sky, some clouds
Diekirch 11 Nov 98 13:15 304.7 many clouds
Diekirch 01 Nov 98 12:25 295.3 blue sky with clouds
Diekirch 29 Oct 98 12:20 361 blue sky, a few clouds
Diekirch 25 Oct 98 11:30 324.8 many clouds
Diekirch 20 Oct 98 12:25 309.7 heavy clouds
Diekirch 15 Oct 98 11:15 280.8 blue sky with many clouds
Diekirch 23 Sep 98 12:18 289.8 blue sky with light haze
Diekirch 21 Sep 98 13:55 307.5 blue sky with hazy cloud
Diekirch 20 Sep 98 12:01 326.7 blue sky with many clouds
Diekirch 19 Sep 98 12:32 318.8 blue sky with hazy clouds
Diekirch 15 Aug 98 12:13 341.2 blue sky
Diekirch 20 Jun 98 11:26 339.1 blue sky, light haze
Diekirch 13 Jun 98 12:38 390.4 blue sky, many clouds
Diekirch 30 May 98 12:15 370.7 very hazy cloud cover
Diekirch 13 May 98 12:30 359.9 blue sky, many clouds
Diekirch 10 May 98 12:00 369.2 blue sky
Diekirch 30 Apr 98 11:55 393.8 blue sky with clouds
Diekirch 29 Apr 98 10:50 405.1 blue sky with clouds
Diekirch 12 Apr 98 12:20 468.5 blue sky, many clouds
Diekirch 31 Mar 98 11:00 307.7 blue sky with clouds
Diekirch 29 Mar 98 11:00 302.2 blue sky, hazy
Diekirch 26 Mar 98 12:00 357.9 blue sky, very light haze
Diekirch 25 Mar 98 12:04 364.4 blue sky, light haze
Diekirch 24 Mar 98 11:55 393.2 blue sky, very light haze
Diekirch 10 Mar 98 13:33 352.8 blue sky, very light haze
Diekirch 08 Mar 98 13:44 372.3 many clouds
Diekirch 07 Mar 98 13:13 365.9 large clouds
Diekirch 01 Mar 98 13:33 415.5 hazy cloud cover
Diekirch 23 Feb 98 12:00 387.9 blue sky
Diekirch 20 Feb 98 11:47 254.5 hazy
Diekirch 18 Feb 98 12:02 236.9 blue sky
Diekirch 14 Feb 98 12:18 256.5 blue sky
Diekirch 12 Feb 98 12:06 275.2 blue sky, hazy clouds
Diekirch 11 Feb 98 11:45 304.3 blue sky, light haze
Diekirch 10 Feb 98 11:58 302.2 blue sky
Diekirch 04 Feb 98 11:57 339.1 blue sky
Diekirch 03 Feb 98 12:00 345.4 blue sky, some clouds
Diekirch 02 Feb 98 11:45 389.1 blue sky, light haze
Diekirch 01 Feb 98 10:15 381.8 blue sky, light haze
Diekirch 28 Jan 98 12:05 311.1 very hazy
Diekirch 27 Jan 98 11:45 279.0 blue sky, very light haze
Diekirch 26 Jan 98 11:16 313.9 blue sky, light haze
Diekirch 11 Jan 98 13:30 298.2 very light haze
Diekirch 10 Jan 98 13.05 315.7 light haze