Total Ozone Thickness 2014

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: 2012, 2011 and previous years.
2. Overplot of 2014 Uccle and meteoLCD total ozone measurements (new!)
3. 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)
4. Older dobson files are in the data archive
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 29Dec14 10:46 318.0 heavy clouds 38.8
Diekirch 26Dec14 12:10 334.4 many clouds 56.5
Diekirch 24Dec14 10:39 287.7 many clouds 47.5
Diekirch 16Dec14 13:46 275.1 heavy clouds 43.7
Diekirch 28Nov14 12:05 239.9 very hazy 24.8
Diekirch 23Nov14 11:58 231.1 very hazy 13.3
Diekirch 10Nov14 12:14 261.9 many clouds 55.2
Diekirch 09Nov14 11:36 264.6 very hazy 29.3
Diekirch 31Oct14 12:48 242.7 light haze 17.7
Diekirch 24Oct14 11:20 269.8 some clouds 32.4
Diekirch 20Oct14 11:08 270.9 many clouds 37.8
Diekirch 19Oct14 13:10 249.3 blue sky 45.0
Diekirch 18Oct14 11:31 249.1 blue sky 12.4
Diekirch 17Oct14 11:57 277.6 heavy clouds 38.9
Diekirch 15Oct14 11:19 274.1 some clouds 11:19
Diekirch 14Oct14 10:57 280.2 many clouds 11.4
Diekirch 12Oct14 11:16 284.4 heavy clouds 32.3
Diekirch 11Oct14 10:53 282.8 heavy clouds 14.9
Diekirch 10Oct14 10:56 266.4 many clouds 28.8
Diekirch 06Oct14 12:27 290.9 many clouds 35.7
Diekirch 04Oct14 12:22 272.2 blue sky 47.3
Diekirch 03Oct14 09:47 275.0 blue sky 6.6
Diekirch 02Oct14 10:06 267.0 light haze 6.7
Diekirch 01Oct14 11:56 275.6 blue sky 48.0
Diekirch 28Sep14 11:23 270.0 hazy 36.1
Diekirch 27Sep14 10:37 268.5 some clouds 40.5
Diekirch 26Sep14 11:20 269.0 many clouds 51.0
Diekirch 25Sep14 10:09 280.0 heavy clouds 44.5
Diekirch 23Sep14 12:06 259.0 some clouds 57.7
Diekirch 20Sep14 11:02 285.0 some clouds 44.3
Diekirch 19Sep14 09:50 277.8 many clouds 32.9
Diekirch 17Sep14 13:16 256.6 some clouds 81.4
Diekirch 16Sep14 12:04 278.9 some clouds 62.5
Diekirch 15Sep14 11:48 276.7 many clouds 70.8
Diekirch 12Sep14 11:07 296.5 some clouds 74.2
Diekirch 11Sep14 11:46 281.7 many clouds 56.7
Diekirch 03Sep14 11:59 300.3 blue sky 85.5
Diekirch 02Sep14 12:08 292.5 many clouds 75.8
Diekirch 01Sep14 11:19 288.2 many clouds 62.5
Diekirch 28Aug14 14:40 308.3 many clouds 41.5
Diekirch 24Aug14 11:58 336.0 many clouds 74.2
Diekirch 23Aug14 10:24 338.5 heavy clouds 56.4
Diekirch 22Aug14 11:09 338.8 many clouds 74.5
Diekirch 21Aug14 12:26 341.1 some clouds 85.9
Diekirch 20Aug14 11:14 349.4 many clouds 82.9
Diekirch 19Aug14 14:17 336.2 some clouds 67.2
Diekirch 18Aug14 13:24 328.9 some clouds 58.5
Diekirch 16Aug14 11:28 328.6 many clouds 76.5
Diekirch 15Aug14 13:57 354.0 many clouds 81.0
Diekirch 14Aug14 12:08 345.6 many clouds 67.5
Diekirch 12Aug14 12:44 330.9 many clouds 70.7
Diekirch 11Aug14 11:16 354.2 many clouds 69.0
Diekirch 31Jul14 11:30 319.3 some clouds 100.2
Diekirch 30Jul14 11:20 320.8 many clouds 91.6
Diekirch 28Jul14 11:00 334.2 many clouds 105.7
Diekirch 27Jul14 12:15 328.7 many clouds 118.4
Diekirch 26Jul14 11:49 340.6 some clouds 124.3
Diekirch 24Jul14 12:44 335.5 many clouds 122.2
Diekirch 23Jul14 11:16 333.6 many clouds 131.3
Diekirch 20Jul14 12:30 316.7 many clouds 118.3
Diekirch 19Jul14 11:33 313.0 light haze 168.1
Diekirch 16Jul14 11:47 322.5 some clouds 91.6
Diekirch 15Jul14 10:49 332.5 many clouds 75.8
Diekirch 14Jul14 12:51 338.3 many clouds 63.9
Diekirch 13Jul14 11:07 336.8 many clouds 72.6
Diekirch 10Jul14 13:18 327.5 some clouds 89.2
Diekirch 07Jul14 11:10 333.2 hazy 74.4
Diekirch 03Jul14 11:27 323.5 blue sky 101.8
Diekirch 02Jul14 11:14 371.0 some clouds 113.8
Diekirch 01Jul14 11:54 357.1 many clouds 110.2
Diekirch 30Jun14 11:37 354.6 heavy clouds 88.8
Diekirch 27Jun14 12:13 338.0 many clouds 111.4
Diekirch 26Jun14 12:09 330.5 many clouds 104.4
Diekirch 25Jun14 11:40 336.2 many clouds 77.2
Diekirch 24Jun14 11:30 344.4 many clouds 100.6
Diekirch 23Jun14 11:45 342.5 many clouds 84.1
Diekirch 22Jun14 11:06 341.7 some clouds 103.6
Diekirch 19Jun14 11:31 344.8 many clouds 74.6
Diekirch 18Jun14 14:57 368.7 many clouds 107.4
Diekirch 17Jun14 11:14 363.6 heavy clouds 85.6
Diekirch 16Jun14 11:04 337.5 heavy clouds 93.4
Diekirch 15Jun14 12:03 348.5 many clouds 96.6
Diekirch 13Jun14 11:04 325.6 light haze 124.5
Diekirch 12Jun14 15:52 325.3 light haze 145.4
Diekirch 09Jun14 07:51 320.7 light haze 99.3
Diekirch 08Jun14 11:26 321.4 light haze 141.3
Diekirch 07Jun14 11:11 334.0 light haze 153.9
Diekirch 06Jun14 11:02 333.6 blue sky 98.6
Diekirch 02Jun14 11:03 342.5 many clouds 122.4
Diekirch 01Jun14 10:45 356.1 heavy clouds 112.1
Diekirch 31May14 11:03 347.5 some clouds 104.2
Diekirch 30May14 12:41 343.8 heavy clouds 62.2
Diekirch 29May14 11:10 347.0 some clouds 100.9
Diekirch 25May14 12:38 316.9 some clouds 103.8
Diekirch 23May14 13:03 339.9 many clouds 48.1
Diekirch 22May14 12:09 319.7 some clouds 81.4
Diekirch 20May14 10:22 342.9 very hazy 102.9
Diekirch 18May14 11:53 328.7 some clouds 105.3
Diekirch 16May14 10:25 333.3 many clouds 94.2
Diekirch 14May14 10:30 375.5 many clouds 89.5
Diekirch 13May14 10:26 395.9 many clouds 70.9
Diekirch 11May14 12:11 366.4 many clouds 83.5
Diekirch 07May14 11:32 350.8 many clouds 76.9
Diekirch 04May14 11:49 332.0 blue sky 109.2
Diekirch 03May14 12:08 352.3 some clouds 97.4
Diekirch 26Apr14 13:06 342.9 many clouds 71.9
Diekirch 25Apr14 13:45 351.2 some clouds 114.2
Diekirch 24Apr14 11:56 345.8 some clouds 114.2
Diekirch 23Apr14 11:01 352.5 some clouds 95.9
Diekirch 21Apr14 11:17 363.6 some clouds 114.2
Diekirch 19Apr14 11:25 362.9 many clouds 93.6
Diekirch 18Apr14 11:47 350.1 many clouds 97.4
Diekirch 17Apr14 10:59 334.0 some clouds 76.2
Diekirch 15Apr14 10:15 339.7 many clouds 88.6
Diekirch 12Apr14 11:16 316.1 some clouds 103.7
Diekirch 11Apr14 10:15 330.9 some clouds 74.0
Diekirch 10Apr14 10:58 318.6 some clouds 79.2
Diekirch 09Apr14 11:27 314.0 some clouds 71.2
Diekirch 08Apr14 11:30 343.3 many clouds 88.3
Diekirch 07Apr14 10:26 316.5 many clouds 48.9
Diekirch 01Apr14 11:02 362.1 hazy 64.4
Diekirch 31Mar14 11:05 354.5 light haze 93.6
Diekirch 30Mar14 12:20 344.0 light haze 105.7
Diekirch 29Mar14 14:22 364.0 light haze 114.6
Diekirch 28Mar14 12:01 396.4 light haze 47.6
Diekirch 27Mar14 12:15 408.7 some clouds 72.7
Diekirch 25Mar14 12:05 416.4 many clouds 76.5
Diekirch 24Mar14 12:37 427.6 heavy clouds 64.3
Diekirch 22Mar14 12:26 377.7 many clouds 82.4
Diekirch 21Mar14 14:10 335.3 heavy clouds 84.6
Diekirch 20Mar14 12:31 331.0 light haze 85.8
Diekirch 19Mar14 12:01 308.5 light haze 70.7
Diekirch 17Mar14 11:36 260.9 many clouds 50.9
Diekirch 13Mar14 12:01 300.8 blue sky 83.6
Diekirch 12Mar14 12:20 314.6 blue sky 88.6
Diekirch 11Mar14 12:04 320.0 blue sky 87.0
Diekirch 10Mar14 12:02 331.7 blue sky 95.1
Diekirch 09Mar14 15:20 279.8 blue sky 100.1
Diekirch 08Mar14 11:22 328.1 light haze 58.5
Diekirch 07Mar14 12:21 276.5 light haze 58.5
Diekirch 03Mar14 11:56 387.3 many clouds 81.9
Diekirch 02Mar14 12:24 377.0 some clouds 43.8
Diekirch 26Feb14 11:12 411.8 heavy clouds 66.4
Diekirch 24Feb14 12:18 380.3 light haze 68.0
Diekirch 23Feb14 08:26 292.5 heavy clouds 41.3
Diekirch 21Feb14 14:00 369.8 many clouds 68.5
Diekirch 20Feb14 08:39 335.1 heavy clouds 41.8
Diekirch 19Feb14 13:12 405.9 heavy clouds 37.2
Diekirch 17Feb14 13:26 375.1 many clouds 42.2
Diekirch 16Feb14 13:29 404.6 many clouds 67.5
Diekirch 15Feb14 12:47 397.0 heavy clouds 78.2
Diekirch 12Feb14 12:17 354.4 heavy clouds 64.3
Diekirch 11Feb14 11:17 384.0 many clouds 63.3
Diekirch 09Feb14 13:17 409.0 heavy clouds 81.0
Diekirch 07Feb14 13:25 350.0 heavy clouds 65.8
Diekirch 02Feb14 11:57 375.2 heavy clouds 61.4
Diekirch 31Jan14 11:21 388.2 light haze na
Diekirch 29Jan14 12:15 391.9 many clouds na
Diekirch 25Jan14 11:28 262.6 many clouds na
Diekirch 24Jan14 11:37 341.7 very hazy na
Diekirch 17Jan14 12:30 374.6 many clouds na
Diekirch 11Jan14 12:12 326.6 many clouds na
Diekirch 10Jan14 11:41 285.7 many clouds na
Diekirch 08Jan14 11:26 364.8 heavy clouds 31.4
Diekirch 07Jan14 11:16 326.4 many clouds 36.3
Diekirch 05Jan14 11:36 369.8 heavy clouds 38.6
Diekirch 02Jan14 11:23 309.5 heavy clouds 29.2
Diekirch 01Jan14 12:40 358.8 heavy clouds 37.8

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 the calibration factor 0.875197 (new calibrated instrument_5375 = 0.875197*instrument_3012) . Comparison tests made from 02 June to 14 July 2013. (comparison graph here).
Starting July 2014, a new calibration factor of 0.9019 will be used, according to a new comparison made in June 2014 (Excel file here)

 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.

Green ground ozone data should be considered unreliable!

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