Total Ozone Thickness 2003

jump straight-on to the data (new Microtops starting 01May03)

new... an updated  intercomparison between the ozone measurements of the Microtops II and those made by the Brewer instrument at the RMI at Uccle over the last 6 years (1997 to 2002)!

other near-live or very recent total ozone data:
Thickness of the ozone layer at Uccle Measured by the Royal Meteorological Institute (RMI) of Belgium; shows mean and variance of all data from 1971 on
Ozone Distribution over Europe (NOAA satellite) Ozone map from data measured by the NOAA ( the GOME instrument on the ERS-2 satellite seems to be definitively out of order!)
Northern Hemisphere Ozone Map Ozone map generated from all Northern Hemisphere stations by the WOUDC

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

Location Date UTC Time Thickness
[DU]
Sky Condition Ground ozone
[ug/m3]
Diekirch 29Dec03 12:23 262.3 heavy clouds 49.9
Diekirch 27Dec03 13:06 323.2 heavy clouds 65.9
Diekirch 22Dec03 12:00 310.1 heavy clouds 61.1
Diekirch 17Dec03 12:12 298.2 heavy clouds na
Diekirch 14Dec03 12:07 277.1 heavy clouds 50.8
Diekirch 10Dec03 12:01 310.0 blue sky 8.1
Diekirch 09Dec03 12:31 278.7 blue sky 21.7
Diekirch 08Dec03 12:09 280.7 blue sky 15.2
Diekirch 07Dec03 12:01 271.3 blue sky 59.3
Diekirch 06Dec03 13:13 312.1 heavy clouds 62.3
Diekirch 04Dec03 12:05 271.5 heavy clouds 8.8
Diekirch 03Dec03 11:07 296.4 light haze 3.4
Diekirch 28Nov03 11:13 284.5 light haze 58.6
Diekirch 21Nov03 12:00 284.4 light haze 25.3
Diekirch 13Nov03 12:44 318.6 light haze 39.8
Diekirch 10Nov03 12:03 225.9 heavy clouds 16.3
Diekirch 09Nov03 12:00 274.5 blue sky 63.8
Diekirch 07Nov03 12:00 303.3 blue sky 47.6
Diekirch 06Nov03 12:03 276.1 blue sky 16.5
Diekirch 03Nov03 11:37 317.1 heavy clouds 60.0
Diekirch 24Oct03 11:04 304.1 light haze 55.4
Diekirch 20Oct03 11:37 277.6 very hazy 60.6
Diekirch 19Oct03 11:11 274.3 light haze 66.3
Diekirch 18Oct03 11:11 281.8 light haze 69.8
Diekirch 17Oct03 11:00 296.2 blue sky 59.8
Diekirch 15Oct03 11:10 287.2 blue sky 63.9
Diekirch 14Oct03 11:01 283.9 light haze 62.3
Diekirch 13Oct03 11:00 279.1 light haze 58.1
Diekirch 12Oct03 11:04 266.1 light haze 83.2
Diekirch 07Oct03 13:39 335.7 many clouds 76.2
Diekirch 05Oct03 12:49 318.9 heavy clouds 73.7
Diekirch 04Oct03 10:58 293.0 heavy clouds 60.8
Diekirch 03Oct03 11:16 298.3 heavy clouds 66.8
Diekirch 02Oct03 12:07 280.0 light haze 65.0
Diekirch 30Sep03 11:03 292.5 light haze 79.6
Diekirch 28Sep03 12:00 301.5 very hazy 106.5
Diekirch 27Sep03 12:04 285.0 some clouds 109.4
Diekirch 26Sep03 11:18 288.5 blue sky 94.7
Diekirch 25Sep03 12:04 295.2 light haze 89.0
Diekirch 24Sep03 11:07 290.6 many clouds 65.7
Diekirch 23Sep03 13:05 293.3 many clouds 75.6
Diekirch 22Sep03 11:04 289.8 blue sky 118.1
Diekirch 21Sep03 12:04 296.2 blue sky 156.0
Diekirch 20Sep03 12:03 297.2 blue sky 179.8
Diekirch 19Sep03 11:08 284.4 blue sky 105.2
Diekirch 18Sep03 11:15 277.0 blue sky 123.1
Diekirch 17Sep03 11:04 282.6 light haze 101.9
Diekirch 16Sep03 12:05 278.1 light haze 130.8
Diekirch 15Sep03 11:05 268.7 blue sky 101.2
Diekirch 14Sep03 12:20 271.9 blue sky 99.6
Diekirch 13Sep03 14:01 288.8 light haze 97.7
Diekirch 12Sep03 11:06 315.7 many clouds 72.2
Diekirch 11Sep03 11:16 319.1 many clouds 69.1
Diekirch 03Sep03 12:08 324.0 light haze 99.5
Diekirch 27Aug03 12:14 316.6 many clouds 94.8
Diekirch 25Aug03 12:00 303.8 blue sky 100.2
Diekirch 24Aug03 12:00 313.9 blue sky 110.0
Diekirch 23Aug03 13:40 310.4 many clouds 78.3
Diekirch 22Aug03 12:16 311.0 many clouds 82.2
Diekirch 29Jul03 12:36 343.5 many clouds 127.9
Diekirch 28Jul03 11:10 351.1 some clouds 86.9
Diekirch 27Jul03 10:55 324.1 heavy clouds 61.7
Diekirch 19Jul03 11:04 321.9 very light haze 154.8
Diekirch 16Jul03 10:50 329.4 hazy 155.3
Diekirch 14Jul03 11:14 319.0 blue sky 127.9
Diekirch 10Jul03 11:30 314.4 blue sky 131.6
Diekirch 06Jul03 12:16 341.7 blue sky 100.0
Diekirch 05Jul03 11:45 351.4 heavy clouds 76.8
Diekirch 03Jul03 11:40 374.0 many clouds 84.6
Diekirch 01Jul03 11:00 377.2 heavy clouds 83.6
Diekirch 29Jun03 11:53 341.2 blue sky 133.1
Diekirch 27Jun03 11:23 325.0 very hazy 89.0
Diekirch 26Jun03 10:29 348.9 blue sky 142.6
Diekirch 24Jun03 11:02 346.5 some clouds 108.3
Diekirch 22Jun03 13:13 325.9 light haze 122.9
Diekirch 21Jun03 12:00 324.4 some clouds 122.0
Diekirch 20Jun03 11:03 335.3 many clouds 108.8
Diekirch 17Jun03 11:52 349.8 blue sky 155.1
Diekirch 16Jun03 11:05 340.7 light haze 128.6
Diekirch 15Jun03 12:03 346.2 some clouds 133.1
Diekirch 14Jun03 11:34 337.3 heavy clouds 99.3
Diekirch 12Jun03 11.25 315.9 some clouds 147.8
Diekirch 11Jun03 11:00 317.1 blue sky 97.3
Diekirch 09Jun03 11:56 334.8 some clouds 98.4
Diekirch 08Jun03 11:48 331.9 heavy clouds 157.4
Diekirch 07Jun03 11:02 314.1 some clouds 135.4
Diekirch 04Jun03 11:06 330.7 light haze 133.4
Diekirch 03Jun03 12:21 343.1 very hazy 117.1
Diekirch 01Jun03 12:11 343.3 some clouds 140.5
Diekirch 31May03 12:00 340.7 light haze 167.4
Diekirch 30May03 12:02 330.2 many clouds 132.6
Diekirch 29May03 12:01 335.7 many clouds 134.1
Diekirch 28May03 12:01 346.0 many clouds 122.4
Diekirch 27May03 12:04 341.6 many clouds 119.0
Diekirch 26May03 11:12 356.9 many clouds 92.0
Diekirch 25May03 13:01 362.5 heavy clouds 95.2
Diekirch 23May03 11:05 340.2 some clouds 105.5
Diekirch 21May03 11:13 384.4 heavy clouds 86.1
Diekirch 20May03 11:05 386.4 many clouds 104.6
Diekirch 14May03 10:31 434.8 many clouds 91.0
Diekirch 11May03 12:01 339.1 some clouds 122.4
Diekirch 10May03 12:00 339.3 many clouds 125.8
Diekirch 08May03 11:18 351.5 many clouds 98.0
Diekirch 07May03 11:00 349.1 light haze 85.2
Diekirch 05May03 11:03 332.5 many clouds 66.9
Diekirch 04May03 11:03 350.2 blue sky 119.7
Diekirch 03May03 11:04 367.3 heavy clouds 97.3
Diekirch 02May03 10:21 369.7 heavy clouds 93.6
Diekirch 01May03 11:35 357.9 heavy clouds 97.8
Diekirch 29Apr03 11:08 356.9 heavy clouds 95.1
Diekirch 28Apr03 10:55 365.6 heavy clouds 86.8
Diekirch 27Apr03 12:08 382.4 heavy clouds 105.9
Diekirch 25Apr03 12:03 358.9 heavy clouds 153.2
Diekirch 24Apr03 11:37 370.8 many clouds 144.9
Diekirch 23Apr03 11:00 373.9 some clouds 0.0
Diekirch 22Apr03 13:01 355.3 heavy clouds 112.1
Diekirch 21Apr03 12:05 375.6 some clouds 122.6
Diekirch 04Apr03 12:00 400.6 blue sky 77.2
Diekirch 02Apr03 10:21 451.1 heavy clouds 68.4
Diekirch 01Apr03 11:13 389.0 heavy clouds 87.2
Diekirch 31Mar03 11:00 390.4 blue sky 87.9
Diekirch 30Mar03 11:27 390.4 heavy clouds 105.9
Diekirch 29Mar03 11:56 381.1 light haze 85.4
Diekirch 28Mar03 12:02 395.5 light haze 101.5
Diekirch 27Mar03 12:18 404.1 light haze 85.0
Diekirch 26Mar03 12:00 410.0 light haze 113.0
Diekirch 25Mar03 12:00 396.4 light haze 105.7
Diekirch 24Mar03 12:01 343.4 blue sky 134.1
Diekirch 22Mar03 12:04 338.2 blue sky 90.2
Diekirch 21Mar03 12:01 359.7 blue sky 58.4
Diekirch 20Mar03 12:26 332.2 blue sky 47.0
Diekirch 19Mar03 12:00 336.0 light haze 66.3
Diekirch 18Mar03 12:01 340.0 light haze 86.0
Diekirch 17Mar03 12:00 388.3 light haze 93.3
Diekirch 16Mar03 12:01 359.1 blue sky 97.2
Diekirch 15Mar03 12:39 361.0 blue sky 99.6
Diekirch 14Mar03 12:02 345.5 blue sky 87.0
Diekirch 13Mar03 12:39 359.5 blue sky 83.7
Diekirch 11Mar03 12:21 341.1 heavy clouds 87.8
Diekirch 10Mar03 12:00 352.8 heavy clouds 85.9
Diekirch 09Mar03 12:00 355.6 some clouds 98.7
Diekirch 07Mar03 12:26 353.7 heavy clouds 20.0
Diekirch 05Mar03 12:10 319.9 some clouds 58.2
Diekirch 04Mar03 12:04 325.5 heavy clouds 50.4
Diekirch 03Mar03 12:41 380.8 heavy clouds 76.4
Diekirch 02Mar03 12:07 399.0 heavy clouds 95.2
Diekirch 27Feb03 12:20 344.5 blue sky 45.0
Diekirch 26Feb03 12:09 359.2 very hazy 39.7
Diekirch 25Feb03 12:04 340.2 blue sky 78.8
Diekirch 24Feb03 12:01 347.2 blue sky 80.1
Diekirch 23Feb03 12:00 367.5 light haze 95.7
Diekirch 22Feb03 12:01 411.3 light haze 60.0
Diekirch 21Feb03 12:00 364.7 blue sky 55.3
Diekirch 20Feb03 12:01 376.2 blue sky 61.6
Diekirch 19Feb03 12:01 383.3 blue sky 74.6
Diekirch 18Feb03 12:01 385.6 light haze 66.2
Diekirch 17Feb03 13:24 410.1 light haze 64.5
Diekirch 16Feb03 12:02 421.6 some clouds 85.1
Diekirch 15Feb03 12:02 361.7 blue sky 86.8
Diekirch 14Feb03 12:02 396.5 blue sky 79.9
Diekirch 13Feb03 12:35 410.3 blue sky 72.4
Diekirch 11Feb03 12:23 377.5 light haze 34.4
Diekirch 06Feb03 12:23 289.2 some clouds 63.9
Diekirch 05Feb03 12:03 356.3 many clouds 61.7
Diekirch 04Feb03 12:07 442.1 heavy clouds 61.3
Diekirch 31Jan03 11:40 489.4 many clouds 68.4
Diekirch 30Jan03 12:57 491.1 heavy clouds 66.9
Diekirch 28Jan03 13:17 483.4 many clouds 64.2
Diekirch 25Jan03 12:13 392.9 very hazy 14.1
Diekirch 24Jan03 12:24 405.1 heavy clouds 66.7
Diekirch 20Jan03 12:42 333.0 heavy clouds 57.2
Diekirch 11Jan03 12:10 310.2 blue sky 65.5
Diekirch 10Jan03 12:05 305.2 blue sky 49.2
Diekirch 08Jan03 12:00 323.6 blue sky 49.0
Diekirch 07Jan03 12:05 343.9 many clouds 41.2
Diekirch 06Jan03 12:15 361.7 heavy clouds 62.8
Diekirch 05Jan03 12:04 336.7 blue sky 49.2

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; the water vapour content of the atmosphere and the AOT (aerosol optical thickness) are 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 at dobson97.html, dobson98.html, dobson99.html , dobson00.html, dobson01.html,  dobson02.html for 1997 to 2002 data (html pages). 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. 

Starting 01 May 2003, the Microtops #3012 has been replaced by a new instrument, serial #5375. The readings of the new instrument are about 7% lower than the old ones. A comparison-report will be made when enough data are available.


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