also... | 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 5 years (1997 to 2001)! |
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 |
Actual Ozone Distribution over Europe | Ozone map from data measured by the GOME instrument on the ERS-2 satellite, covering Europe and the southern Mediterranean border |
latitude = 49°52' North | longitude = 6°10' East | altitude = 218 m a.s.l. |
Location | Date | UTC Time | Thickness [DU] |
Sky Condition | Ground ozone [ug/m3] |
Diekirch | 19Dec02 | 12:14 | 289.2 | blue sky | 49.2 |
Diekirch | 11Dec02 | 12:05 | 331.4 | blue sky | 25.3 |
Diekirch | 09Dec02 | 12:00 | 328.1 | blue sky | 36.9 |
Diekirch | 04Dec02 | 11:56 | 328.3 | heavy clouds | 3.5 |
Diekirch | 01Dec02 | 12:08 | 274.6 | heavy clouds | 50.6 |
Diekirch | 25Nov02 | 12:22 | 343.5 | heavy clouds | 13.0 |
Diekirch | 23Nov02 | 12:21 | 316.4 | light haze | 51.0 |
Diekirch | 22Nov02 | 12:14 | 321.5 | heavy clouds | 53.0 |
Diekirch | 20Nov02 | 11:18 | 330.4 | hazy | 23.4 |
Diekirch | 13Nov02 | 11:48 | 306.8 | heavy clouds | 69.9 |
Diekirch | 11Nov02 | 11:58 | 272.8 | heavy clouds | 76.0 |
Diekirch | 09Nov02 | 12:17 | 288.4 | many clouds | 76.2 |
Diekirch | 26Oct02 | 12:28 | 312.7 | heavy clouds | 71.0 |
Diekirch | 20Oct02 | 11:11 | 286.0 | light haze | 34.2 |
Diekirch | 19Oct02 | 10:59 | 319.3 | heavy clouds | 69.0 |
Diekirch | 18Oct02 | 10:50 | 329.9 | heavy clouds | 56.3 |
Diekirch | 15Oct02 | 11:51 | 285.2 | very hazy | 22.3 |
Diekirch | 11Oct02 | 11:30 | 292.2 | hazy | 44.3 |
Diekirch | 09Oct02 | 11:16 | 304.6 | blue sky | 41.9 |
Diekirch | 08Oct02 | 11:34 | 307.3 | many clouds | 43.1 |
Diekirch | 07Oct02 | 11:03 | 304.6 | many clouds | 40.0 |
Diekirch | 05Oct02 | 11:01 | 300.7 | heavy clouds | 58.1 |
Diekirch | 04Oct02 | 12:20 | 291.1 | many clouds | 80.3 |
Diekirch | 02Oct02 | 11:22 | 273.0 | very hazy | 18.0 |
Diekirch | 30Sep02 | 11:08 | 286.8 | blue sky | 57.9 |
Diekirch | 29Sep02 | 12:01 | 283.7 | a few clouds | 78.5 |
Diekirch | 26Sep02 | 11:36 | 288.9 | a few clouds | 73.5 |
Diekirch | 26Sep02 | 13:15 | 315.7 | heavy clouds | 52.8 |
Diekirch | 24Sep02 | 11:03 | 338.1 | blue sky | 63.3 |
Diekirch | 23Sep02 | 12:45 | 331.4 | many clouds | 53.0 |
Diekirch | 17Sep02 | 11:42 | 287.7 | heavy clouds | 84.1 |
Diekirch | 16Sep02 | 11:18 | 294.0 | heavy clouds | 79.1 |
Diekirch | 14Sep02 | 11:56 | 308.1 | many clouds | 94.5 |
Diekirch | 13Sep02 | 11:23 | 310.6 | blue sky | 100.4 |
Diekirch | 12Sep02 | 11:56 | 310.5 | blue sky | 85.0 |
Diekirch | 11Sep02 | 12:02 | 321.6 | hazy | 46.1 |
Diekirch | 08Sep02 | 12:38 | 332.4 | many clouds | 113.4 |
Diekirch | 07Sep02 | 11:22 | 341.5 | many clouds | 102.1 |
Diekirch | 06Sep02 | 11:47 | 323.9 | hazy | 97.9 |
Diekirch | 05Sep02 | 13:32 | 322.2 | hazy | 100.4 |
Diekirch | 30Aug02 | 12:13 | 303.5 | very hazy | 114.7 |
Diekirch | 17Aug02 | 11:58 | 335.0 | many clouds | 122.0 |
Diekirch | 03Aug02 | 14:24 | 353.4 | heavy clouds | 82.3 |
Diekirch | 30Jul02 | 11:55 | 338.9 | many clouds | 149.5 |
Diekirch | 29Jul02 | 12:05 | 339.0 | a few clouds | 143.6 |
Diekirch | 28Jul02 | 17:25 | 312.4 | blue sky | 137.2 |
Diekirch | 21Jul02 | 11:42 | 359.0 | many clouds | 94.0 |
Diekirch | 13Jul02 | 10:11 | 379.2 | heavy clouds | 94.5 |
Diekirch | 12Jul02 | 11:42 | 342.5 | very hazy | 103.7 |
Diekirch | 09Jul02 | 12:25 | 344.5 | heavy clouds | 128.3 |
Diekirch | 08Jul02 | 11:00 | 333.2 | some clouds | 95.4 |
Diekirch | 07Jul02 | 13:38 | 333.3 | many clouds | 85.6 |
Diekirch | 05Jul02 | 10:54 | 373.4 | heavy clouds | 91.1 |
Diekirch | 04Jul02 | 11:36 | 366.5 | heavy clouds | 64.0 |
Diekirch | 02Jul02 | 11:36 | 382.0 | heavy clouds | 56.4 |
Diekirch | 30Jun02 | 14:50 | 364.7 | some clouds | 107.8 |
Diekirch | 29Jun02 | 12:03 | 368.3 | many clouds | 86.5 |
Diekirch | 28Jun02 | 12:28 | 402.5 | some clouds | 78.2 |
Diekirch | 27Jun02 | 14:48 | 360.7 | many clouds | 93.8 |
Diekirch | 26Jun02 | 11:21 | 367.3 | blue sky | 146.6 |
Diekirch | 25Jun02 | 12:00 | 379.5 | blue sky | 111.1 |
Diekirch | 22Jun02 | 12:06 | 320.7 | many clouds | 117.8 |
Diekirch | 20Jun02 | 11:24 | 349.5 | many clouds | 98.0 |
Diekirch | 18Jun02 | 11:48 | 352.1 | blue sky | 179.6 |
Diekirch | 17Jun02 | 11:01 | 338.4 | hazy | 147.3 |
Diekirch | 16Jun02 | 12:00 | 352.1 | many clouds | 93.1 |
Diekirch | 15Jun02 | 11:32 | 345.4 | very hazy | 69.2 |
Diekirch | 14Jun02 | 10:48 | 337.8 | many clouds | 48.6 |
Diekirch | 09Jun02 | 11:21 | 375.8 | heavy clouds | 83.1 |
Diekirch | 08Jun02 | 10:51 | 364.8 | heavy clouds | 90.0 |
Diekirch | 04Jun02 | 11:38 | 352.9 | many clouds | 114.4 |
Diekirch | 03Jun02 | 10:44 | 360.0 | many clouds | 95.1 |
Diekirch | 02Jun02 | 10:59 | 343.2 | very light haze | 120.1 |
Diekirch | 01Jun02 | 11:58 | 351.6 | blue sky | 126.1 |
Diekirch | 31May02 | 10:50 | 350.2 | many clouds | 109.4 |
Diekirch | 29May02 | 12:02 | 376.7 | heavy clouds | 74.1 |
Diekirch | 25May02 | 11:35 | 365.5 | heavy clouds | 74.9 |
Diekirch | 21May02 | 12:32 | 360.1 | blue sky | 128.8 |
Diekirch | 20May02 | 10:28 | 361.8 | many clouds | 88.1 |
Diekirch | 19May02 | 14:23 | 344.3 | some clouds | 106.2 |
Diekirch | 17May02 | 13:24 | 351.6 | light haze | 169.6 |
Diekirch | 16May02 | 11:22 | 364.8 | some clouds | 116.1 |
Diekirch | 14May02 | 13:52 | 391.3 | heavy clouds | 82.8 |
Diekirch | 13May02 | 11:00 | 354.9 | some clouds | 105.6 |
Diekirch | 12May02 | 11:15 | 377.7 | heavy clouds | 87.9 |
Diekirch | 11May02 | 10:58 | 371.2 | heavy clouds | 73.6 |
Diekirch | 09May02 | 11:38 | 340.0 | very hazy | 124.3 |
Diekirch | 08May02 | 10:51 | 358.6 | hazy | 93.3 |
Diekirch | 01May02 | 12:47 | 373.0 | heavy clouds | 93.4 |
Diekirch | 30Apr02 | 11:58 | 348.2 | heavy clouds | 93.4 |
Diekirch | 29Apr02 | 10:17 | 387.7 | many clouds | 90.8 |
Diekirch | 27Apr02 | 10:50 | 411.9 | many clouds | 81.9 |
Diekirch | 25Apr02 | 11:24 | 375.9 | some clouds | 114.9 |
Diekirch | 23Apr02 | 10:13 | 371.3 | hazy | 84.1 |
Diekirch | 21Apr02 | 10:06 | 372.1 | blue sky | 107.3 |
Diekirch | 19Apr02 | 10:22 | 435.1 | very hazy | 71.4 |
Diekirch | 14Apr02 | 11:26 | 423.6 | heavy clouds | 99.7 |
Diekirch | 12Apr02 | 11:10 | 426.1 | hazy | 104.4 |
Diekirch | 11Apr02 | 12:02 | 437.4 | light haze | 97.0 |
Diekirch | 10Apr02 | 11:52 | 447.1 | very hazy | 112.5 |
Diekirch | 09Apr02 | 11:00 | 449.8 | very hazy | na |
Diekirch | 08Apr02 | 11:03 | 416.1 | blue sky | na |
Diekirch | 07Apr02 | 11:13 | 404.3 | blue sky | na |
Diekirch | 06Apr02 | 12:16 | 428 | blue sky | na |
Diekirch | 05Apr02 | 11:01 | 402.9 | blue sky | na |
Diekirch | 04Apr02 | 11:05 | 370.7 | blue sky | na |
Diekirch | 02Apr02 | 11:29 | 339.7 | light haze | na |
Diekirch | 25Mar02 | 11:41 | 357.1 | heavy clouds | na |
Diekirch | 23Mar02 | 10:54 | 371.5 | heavy clouds | na |
Diekirch | 17Mar02 | 10:46 | 414.3 | light haze | 48.1 |
Diekirch | 16Mar02 | 11:55 | 376.1 | light haze | 58.9 |
Diekirch | 15Mar02 | 11:42 | 377.4 | heavy clouds | 23.8 |
Diekirch | 13Mar02 | 12:38 | 362.8 | light haze | 58.8 |
Diekirch | 11Mar02 | 12:05 | 347.5 | a few clouds | 46.0 |
Diekirch | 10Mar02 | 12:01 | 345.1 | some clouds | 60.9 |
Diekirch | 08Mar02 | 12:20 | 317.7 | hazy | 63.7 |
Diekirch | 07Mar02 | 12:53 | 318.3 | heavy clouds | 50.7 |
Diekirch | 05Mar02 | 12:18 | 415.9 | hazy | 28.0 |
Diekirch | 04Mar02 | 12:00 | 355.0 | some clouds | 38.5 |
Diekirch | 03Mar02 | 12:05 | 417.2 | many clouds | 36.2 |
Diekirch | 01Mar02 | 11:34 | 406.7 | many clouds | 39.1 |
Diekirch | 28Feb02 | 12:22 | 457.9 | many clouds | 35.2 |
Diekirch | 27Feb02 | 11:58 | 345.2 | many clouds | 42.4 |
Diekirch | 26Feb02 | 12:03 | 347.3 | heavy clouds | 32.9 |
Diekirch | 25Feb02 | 12:22 | 317.6 | heavy clouds | 31.1 |
Diekirch | 24Feb02 | 12:50 | 337.9 | heavy clouds | 33.6 |
Diekirch | 17Feb02 | 12:34 | 346.1 | light haze | 33.3 |
Diekirch | 16Feb02 | 12:06 | 339.7 | blue sky | 36.9 |
Diekirch | 10Feb02 | 12:40 | 347.5 | heavy clouds | 40.7 |
Diekirch | 04Feb02 | 12:01 | 318.1 | light haze | 47.2 |
Diekirch | 03Feb02 | 12:13 | 311.3 | light haze | 50.6 |
Diekirch | 02Feb02 | 12:03 | 293.5 | blue sky | 27.1 |
Diekirch | 31Jan02 | 12:23 | 351.6 | heavy clouds | 51.4 |
Diekirch | 30Jan02 | 12:02 | 278.8 | very hazy | 13.3 |
Diekirch | 29Jan02 | 11:22 | 296.4 | light haze | 37.5 |
Diekirch | 25Jan02 | 11:08 | 300.4 | light haze | 25.7 |
Diekirch | 08Jan02 | 12:01 | 282.3 | light haze | na |
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 at dobson97.html, dobson98.html, dobson99.html , dobson00.html, dobson01.html for 1997 to 2001 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.
Back to Home-Page of Meteo_LCD ............................................Please send all mail to francis.massen@ci.educ.lu