Total Ozone Thickness 2012

jump straight-on to the data

Look here: 1. Intercomparison between the ozone measurements of the Microtops II and those made by the Brewer instrument at the RMI at Uccle: 2011 and previous years.
2. Overplot of 2012 Uccle and meteoLCD total ozone measurements (new!)
3. Animated Gif with all meteoLCD plots from WOUDC (see station 412). meteoLCD and Uccle and animated gif with all Uccle (Brewer#16) plots from 1983 to 2010
4. 3D plot of total ozone column for latitude region [45 to 50] from 1964 to 2007 and  maps of all of meteoLCD measurements (from WOUDC)
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 (link has changed!)
Ozone Distribution (NH + SH) Global Ozone maps from Environment Canada 
Northern Hemisphere Ozone Map Ozone map generated from all Northern Hemisphere stations by the WOUDC
The coordinates of DIEKIRCH are:
latitude = 49°52' North 
longitude = 6°10'
altitude = 218 m a.s.l. 		click to enlarge!
 
Location Date UTC Time Thickness
[DU]		 Sky Condition Ground ozone
[ug/m3]
Diekirch 30Dec12 13:50 327.2 heavy clouds 74.5
Diekirch 29Dec12 11:38 248.6 heavy clouds 53.5
Diekirch 26Dec12 11:19 267.2 many clouds 67.7
Diekirch 24Dec12 12:53 227.1 very hazy 31.7
Diekirch 12Dec12 12:06 305.4 very hazy 9.4
Diekirch 10Dec12 12:43 290.4 heavy clouds 29.3
Diekirch 08Dec12 12:02 297.9 many clouds 40.7
Diekirch 06Dec12 11:00 353.8 many clouds 40.1
Diekirch 30Nov12 12:15 285.5 many clouds 38.4
Diekirch 25Nov12 12:20 280.7 many clouds 68.1
Diekirch 16Nov12 12:14 251.9 very hazy 14.0
Diekirch 11Nov12 11:25 272.0 light haze 54.4
Diekirch 10Nov12 10:59 315.8 many clouds 54.4
Diekirch 31Oct12 12:06 278.3 blue sky na
Diekirch 28Oct12 12:25 286.1 blue sky na
Diekirch 27Oct12 11:00 274.1 many clouds na
Diekirch 25Oct12 14:03 237.8 light haze na
Diekirch 24Oct12 10:58 250.5 light haze na
Diekirch 23Oct12 11:05 228.6 light haze na
Diekirch 22Oct12 10:36 236.6 very hazy na
Diekirch 21Oct12 12:19 240.0 light haze na
Diekirch 20Oct12 11:22 240.6 light haze na
Diekirch 19Oct12 11:43 244.6 very hazy na
Diekirch 10Oct12 10:54 273.2 light haze na
Diekirch 09Oct12 11:13 263.2 many clouds na
Diekirch 08Oct12 12:06 247.2 heavy clouds na
Diekirch 01Oct12 10:09 287.9 light haze na
Diekirch 30Sep12 11:55 292.3 some clouds na
Diekirch 23Sep12 11:01 268.5 very hazy na
Diekirch 21Sep12 11:00 294.0 very hazy na
Diekirch 19Sep12 11:12 308.6 many clouds na
Diekirch 17Sep12 11:08 278.7 blue sky na
Diekirch 16Sep12 12:33 271.5 some clouds na
Diekirch 10Sep12 13:26 286.7 many clouds 64.4
Diekirch 07Sep12 11:28 279.8 blue sky 47.0
Diekirch 06Sep12 12:54 281.1 blue sky 52.4
Diekirch 04Sep12 11:52 271.3 blue sky 52.9
Diekirch 03Sep12 11:14 290.6 some clouds 49.9
Diekirch 02Sep12 11:34 289.8 light haze 51.3
Diekirch 01Sep12 11:10 306.2 many clouds 44.8
Diekirch 30Aug12 12:42 301.3 heavy clouds 38.7
Diekirch 29Aug12 10:47 294.8 many clouds 39.3
Diekirch 27Aug12 11:52 276.5 heavy clouds 40.4
Diekirch 25Aug12 12:03 280.1 many clouds 31.7
Diekirch 24Aug12 11:57 296.5 heavy clouds 49.4
Diekirch 23Aug12 12:02 289.9 some clouds 53.0
Diekirch 22Aug12 11:20 281.6 heavy clouds 38.3
Diekirch 19Aug12 11:44 287.5 blue sky 75.1
Diekirch 18Aug12 11:39 284.9 blue sky 72.5
Diekirch 17Aug12 12:22 298.2 light haze 63.2
Diekirch 16Aug12 12:13 309.4 some clouds 41.2
Diekirch 15Aug12 12:14 314.0 heavy clouds 65.4
Diekirch 14Aug12 10:44 314.9 some clouds 52.2
Diekirch 13Aug12 10:16 324.0 many clouds 37.0
Diekirch 12Aug12 11:55 329.2 blue sky 57.3
Diekirch 11Aug12 10:56 317.9 blue sky 48.9
Diekirch 10Aug12 10:33 309.2 blue sky 46.2
Diekirch 09Aug12 12:15 316.7 many clouds 50.2
Diekirch 08Aug12 11:59 314.1 some clouds 39.3
Diekirch 07Aug12 12:13 315.3 many clouds 29.7
Diekirch 06Aug12 11:48 336.2 many clouds 27.1
Diekirch 05Aug12 12:07 323.4 some clouds 46.2
Diekirch 04Aug12 11:31 332.8 many clouds 40.1
Diekirch 03Aug12 10:49 325.2 many clouds 37.1
Diekirch 01Aug12 11:18 319.3 blue sky 52.1
Diekirch 31Jul12 10:34 317.2 heavy clouds 40.6
Diekirch 29Jul12 10:27 331.7 many clouds 42.4
Diekirch 27Jul12 11:40 325.8 some clouds 94.2
Diekirch 26Jul12 10:41 327.3 blue sky 109.5
Diekirch 25Jul12 12:30 333.0 blue sky 96.8
Diekirch 24Jul12 11:44 325.6 very hazy 71.5
Diekirch 23Jul12 10:53 322.3 blue sky 53.6
Diekirch 22Jul12 12:03 330.3 light haze 46.8
Diekirch 21Jul12 10:10 364.8 many clouds 38.2
Diekirch 18Jul12 11:09 315.3 heavy clouds 43.8
Diekirch 16Jul12 10:50 330.0 many clouds 40.4
Diekirch 14Jul12 13:37 358.4 many clouds 36.8
Diekirch 13Jul12 11:42 337.0 heavy clouds 25.1
Diekirch 10Jul12 11:15 316.2 heavy clouds 45.3
Diekirch 09Jul12 11:05 314.8 heavy clouds 48.7
Diekirch 08Jul12 13:31 322.0 many clouds 44.7
Diekirch 07Jul12 12:07 335.0 many clouds 49.2
Diekirch 06Jul12 11:32 331.0 many clouds 59.7
Diekirch 05Jul12 12:39 316.3 many clouds 76.1
Diekirch 03Jul12 10:32 291.1 some clouds 67.1
Diekirch 01Jul12 12:27 277.0 many clouds 54.9
Diekirch 28Jun12 10:41 279.7 very hazy 71.7
Diekirch 26Jun12 10:55 327.3 many clouds 68.1
Diekirch 25Jun12 10:45 328.0 many clouds 52.4
Diekirch 22Jun12 11:00 358.2 many clouds 51.8
Diekirch 18Jun12 11:22 314.0 many clouds 49.9
Diekirch 17Jun12 10:41 304.9 many clouds 59.2
Diekirch 12Jun12 11:14 341.6 heavy clouds 49.0
Diekirch 10Jun12 14:10 337.5 some clouds 70.0
Diekirch 09Jun12 11:31 349.8 many clouds 60.5
Diekirch 08Jun12 10:37 332.1 many clouds 55.8
Diekirch 06Jun12 11:06 338.9 many clouds 46.2
Diekirch 04Jun12 10:53 355.3 heavy clouds 54.6
Diekirch 26May12 12:00 323.3 blue sky 105.5
Diekirch 25May12 10:55 329.9 some clouds 91.4
Diekirch 24May12 09:53 347.1 very hazy 80.2
Diekirch 22May12 12:20 325.6 some clouds 64.5
Diekirch 20May12 14:17 340.8 some clouds 68.1
Diekirch 19May12 10:24 328.2 many clouds 56.2
Diekirch 17May12 12:09 298.7 light haze 72.5
Diekirch 16May12 10:51 368.5 many clouds 55.3
Diekirch 15May12 10:46 404.1 many clouds 60.8
Diekirch 14May12 11:08 324.8 light haze 72.4
Diekirch 13May12 11:28 358.0 some clouds 78.0
Diekirch 12May12 11:55 331.7 heavy clouds 70.6
Diekirch 07May12 11:03 368.2 heavy clouds 81.8
Diekirch 06May12 12:14 435.2 heavy clouds 62.8
Diekirch 05May12 11:17 369.6 very hazy 58.3
Diekirch 04May12 11:01 362.1 some clouds 56.2
Diekirch 03May12 12:49 375.1 some clouds 70.1
Diekirch 01May12 11:21 328.3 many clouds 71.5
Diekirch 30Apr12 11:03 335.0 heavy clouds 83.7
Diekirch 29Apr12 14:28 321.5 some clouds 92.8
Diekirch 28Apr12 12:02 299.8 light haze 70.9
Diekirch 27Apr12 11:31 312.5 heavy clouds 79.0
Diekirch 23Apr12 11:59 359.6 many clouds 56.2
Diekirch 22Apr12 10:14 384.0 many clouds 60.6
Diekirch 21Apr12 11:04 381.8 heavy clouds 71.4
Diekirch 20Apr12 12:10 390.8 heavy clouds 84.5
Diekirch 16Apr12 10:00 403.1 many clouds 64.2
Diekirch 11Apr12 10:33 406.6 many clouds 59.8
Diekirch 10Apr12 11:15 371.6 many clouds 55.2
Diekirch 06Apr12 10:53 356.5 some clouds 41.4
Diekirch 03Apr12 13:15 312.7 light haze 72.1
Diekirch 02Apr12 11:25 328.1 very hazy 57.0
Diekirch 01Apr12 13:57 325.3 blue sky 56.8
Diekirch 28Mar12 10:53 280.0 light haze 76.7
Diekirch 27Mar12 11:17 297.5 light haze 80.3
Diekirch 26Mar12 11:11 322.7 blue sky 64.6
Diekirch 25Mar12 12:22 340.0 blue sky 69.7
Diekirch 24Mar12 10:54 298.8 light haze 50.1
Diekirch 23Mar12 12:06 298.2 blue sky 60.9
Diekirch 22Mar12 11:07 313.9 blue sky 65.3
Diekirch 21Mar12 12:05 327.0 blue sky 65.9
Diekirch 20Mar12 12:04 306.1 blue sky 57.6
Diekirch 19Mar12 12:01 366.3 heavy clouds 50.5
Diekirch 18Mar12 13:03 334.7 many clouds 58.1
Diekirch 16Mar12 12:09 302.2 blue sky 52.3
Diekirch 15Mar12 12:08 290.7 light haze 17.7
Diekirch 14Mar12 11:58 296.5 light haze 33.2
Diekirch 12Mar12 11:52 307.9 many clouds 43.3
Diekirch 11Mar12 12:18 321.0 some clouds 54.3
Diekirch 09Mar12 11:50 301.9 light haze 53.5
Dieirch 06Mar12 13:03 369.7 heavy clouds 38.5
Diekirch 14Feb12 12:00 392.5 heavy clouds 41.1
Diekirch 12Feb12 12:15 306.6 light haze 44.1
Diekirch 11Feb12 12:30 360.2 blue sky 51.1
Diekirch 10Feb12 12:26 329.8 blue sky 47.6
Diekirch 06Feb12 11:25 441.7 blue sky 31.0
Diekirch 05Feb12 12:13 416.6 blue sky 38.7
Diekirch 04Feb12 13:10 359.5 blue sky 42.3
Diekirch 03Feb12 12:00 321.7 blue sky 52.9
Diekirch 02Feb12 12:28 283.8 blue sky 51.8
Diekirch 01Feb12 11:49 260.4 blue sky 51.7
Diekirch 31Jan12 12:14 265.7 light haze 34.8
Diekirch 23Jan12 11:59 287.4 heavy clouds 36.1
Diekirch 17Jan12 12:02 270.0 light haze 18.2
Diekirch 16Jan12 12:01 274.7 blue sky 38.4
Diekirch 15Jan12 13:07 248.6 some clouds 38.2
Diekirch 14Jan12 11:36 224.5 some clouds 26.1
Diekirch 11Jan12 12:03 236.7 blue sky 32.5
Diekirch 08Jan12 12:32 281.5 heavy clouds 42.6
Diekirch 07Jan12 12:36 275.4 heavy clouds 55.7
Diekirch 05Jan12 12:52 323.1 heavy clouds 47.2
Diekirch 04Jan12 12:10 268.9 heavy clouds 47.2

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 pressure of 1013.25 [HPa]. Common values are in the 250..350 DU range.

The previous years dobsonyy.html files and the Microtops measurement files can be found in the data area!

Attention: blue lines correspond to measurements done using instrument #3012 (operator Mike Zimmer). The data in the table are the original readings multiplied by a calibration factor.
2010: factor = 0.909 (Comparison tests made from 15Sep to 02Oct 2009)
2011: factor = 0.888
2012 from 1st March on: factor = 0.929 (Comparison tests made from 14Mar to 16Apr 2012, blue sky readings only).

 Starting 15 Sep 2009, Microtops #5375 is back from calibration at Mauna Loa. Purple data correspond to the new calibrated readings. There is a big difference between the readings before and after calibration. For some time, measurements will be made with both Microtops, and a conclusion drawn thereafter.

On 23 Jan 2011 the WOUDC has 498 contributing stations; only 57 ( = 11.4%) have full yearly data for the 2001-2010 period. MeteoLCD is among them!

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