Total Ozone Thickness 2015

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. Comparison and Calibration plots for common direct sky (DS) measurements.
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 31Dec15 12:58 251.7 some clouds 63.6
Diekirch 27Dec15 12:15 279.3 some clouds 42.0
Diekirch 26Dec15 12:01 254.8 some clouds 54.5
Diekirch 24Dec15 12:11 258.0 heavy clouds 38.6
Diekirch 23Dec15 10:35 258.2 many clouds 46.0
Diekirch 21Dec15 12:03 264.0 heavy clouds 68.9
Diekirch 19Dec15 13:27 288.9 heavy clouds 30.0
Diekirch 17Dec15 13:25 265.7 some clouds 35.2
Diekirch 14Dec15 11:50 283.2 some clouds 24.5
Diekirch 09Dec15 12:14 288.1 some clouds 48.1
Diekirch 08Dec15 12:51 276.5 hazy 3.6
Diekirch 07Dec15 12:22 252.7 some clouds 53.7
Diekirch 03Dec15 11:30 252.1 many clouds 20.4
Diekirch 28Nov15 12:49 230.4 many clouds 68.5
Diekirch 26Nov15 11:36 242.1 many clouds 57.4
Diekirch 25Nov15 11:10 290.7 many clouds 38.7
Diekirch 23Nov15 11:01 296.1 some clouds 43.0
Diekirch 22Nov15 11:48 311.9 many clouds 68.4
Diekirch 21Nov15 12:04 331.9 some clouds 64.7
Diekirch 11Nov15 10:53 231.8 many clouds 55.9
Diekirch 05Nov15 12:30 220.6 very hazy 22.8
Diekirch 04Nov15 11:54 263.2 many clouds 7.4
Diekirch 03Nov15 12:35 269.4 very hazy 10.7
Diekirch 01Nov15 12:20 238.6 light haze 13.4
Diekirch 29Oct15 10:57 270.8 very hazy 36.2
Diekirch 28Oct15 12:11 284.1 very hazy 16.7
Diekirch 26Oct15 12:36 281.3 many clouds 35.5
Diekirch 24Oct15 11:03 260.6 many clouds 50.9
Diekirch 23Oct15 11:00 277.2 heavy clouds 30.6
Diekirch 21Oct15 11:07 286.2 many clouds 44.5
Diekirch 13Oct15 11:14 329.3 very hazy 18.4
Diekirch 12Oct15 11:20 288.4 very hazy 54.9
Diekirch 11Oct15 09:16 286.3 blue sky 49.7
Diekirch 10Oct15 10:59 312.1 heavy clouds 44.4
Diekirch 08Oct15 11:58 291.3 very hazy 61.2
Diekirch 03Oct15 11:07 275.1 many clouds 38.4
Diekirch 01Oct15 11:01 272.0 blue sky 69.0
Diekirch 30Sep15 11:42 269.5 blue sky 73.9
Diekirch 29Sep15 10:58 282.5 some clouds 69.8
Diekirch 28Sep15 11:10 276.6 blue sky 74.8
Diekirch 27Sep15 10:36 285.4 blue sky 78.7
Diekirch 25Sep15 11:18 285.5 some clouds 62.2
Diekirch 22Sep15 11:22 311.2 many clouds 58.4
Diekirch 21Sep15 09:48 300.3 very hazy 18.5
Diekirch 18Sep15 11:10 311.4 heavy clouds 75.1
Diekirch 16Sep15 12:41 296.8 heavy clouds 69.8
Diekirch 15Sep15 11:25 310.6 heavy clouds 68.2
Diekirch 14Sep15 11:11 309.1 many clouds 58.1
Diekirch 12Sep15 13:39 306.6 heavy clouds 92.2
Diekirch 11Sep15 11:40 316.6 some clouds 81.9
Diekirch 10Sep15 11:30 315.0 many clouds 75.1
Diekirch 09Sep15 11:12 297.0 many clouds 68.2
Diekirch 03Sep15 11:15 295.3 some clouds 85.2
Diekirch 02Sep15 10.31 298.7 some clouds 71.3
Diekirch 31Aug15 10:31 289.8 blue sky 103.4
Diekirch 30Aug15 11:13 294.3 blue sky 127.0
Diekirch 29Aug15 11:07 279.7 blue sky 53.3
Diekirch 28Aug15 10:56 291.1 heavy clouds 46.2
Diekirch 26Aug15 11:05 302.8 some clouds 81.0
Diekirch 25Aug15 11:20 305.6 heavy clouds 66.4
Diekirch 22Aug15 11:17 300.0 some clouds 128.4
Diekirch 21Aug15 11:10 300.3 some clouds 127.4
Diekirch 20Aug15 12:33 311.5 many clouds 113.2
Diekirch 19Aug15 11:05 314.2 many clouds 97.9
Diekirch 18Aug15 12:22 322.8 heavy clouds 79.1
Diekirch 14Aug15 13:42 296.7 many clouds 97.5
Diekirch 13Aug15 12:01 303.4 very hazy 172.3
Diekirch 12Aug15 11:41 305.1 light haze 129.8
Diekirch 02Aug15 08:36 317.3 blue sky 91.0
Diekirch 01Aug15 12:03 326.9 some clouds 129.9
Diekirch 31Jul15 11:44 326.2 many clouds 82.0
Diekirch 30Jul15 12:13 352.5 many clouds 79.2
Diekirch 29Jul15 11:00 332.3 some clouds 79.0
Diekirch 28Jul15 11:45 320.5 heavy clouds 78.7
Diekirch 27Jul15 13:16 330.3 many clouds 57.1
Diekirch 26Jul15 09:45 339.1 many clouds 86.5
Diekirch 23Jul15 13:09 295.3 many clouds 94.2
Diekirch 22Jul15 12:57 293.1 heavy clouds 81.9
Diekirch 21Jul15 11:07 285.9 many clouds 54.5
Diekirch 20Jul15 12:28 302.8 heavy clouds 48.6
Diekirch 18Jul15 11:12 300.0 heavy clouds 85.0
Diekirch 17Jul15 11:16 305.2 blue sky 120.1
Diekirch 16Jul15 11:07 306.2 some clouds 109.6
Diekirch 14Jul15 11:36 308.7 heavy clouds 50.7
Diekirch 30Jun15 11:27 318.4 blue sky 142.1
Diekirch 29Jun15 12:49 317.1 some clouds 101.9
Diekirch 28Jun15 10:43 308.8 many clouds 102.9
Diekirch 27Jun15 14:40 345.3 many clouds 95.2
Diekirch 25Jun15 12:30 340.9 many clouds 109.3
Diekirch 24Jun15 11:04 341.2 many clouds 66.8
Diekirch 23Jun15 11:19 379.2 heavy clouds 69.2
Diekirch 19Jun15 10:36 358.0 heavy clouds 77.6
Diekirch 18Jun15 12:36 340.2 heavy clouds 63.6
Diekirch 17Jun15 11:29 318.7 light haze 94.2
Diekirch 16Jun15 14:53 356.9 many clouds 81.9
Diekirch 15Jun15 10:56 341.4 many clouds 102.5
Diekirch 14Jun15 16:08 336.0 many clouds 116.0
Diekirch 13Jun15 11:56 327.6 heavy clouds 104.7
Diekirch 12Jun15 10:57 327.4 light haze 132.6
Diekirch 11Jun15 11:00 321.8 many clouds 88.8
Diekirch 10Jun15 10:20 359.8 some clouds 86.8
Diekirch 09Jun15 11:15 353.2 some clouds 86.8
Diekirch 08Jun15 11:39 329.8 some clouds 93.2
Diekirch 07Jun15 12:50 318.9 blue sky 128.9
Diekirch 06Jun15 11:04 327.8 blue sky 55.5
Diekirch 05Jun15 11:29 329.7 blue sky 105.3
Diekirch 04Jun15 11:38 332.2 blue sky 120.3
Diekirch 03Jun15 11:49 334.1 some clouds 63.0
Diekirch 02Jun15 12:38 336.6 some clouds 86.1
Diekirch 30May15 11:18 367.4 many clouds 89.4
Diekirch 27May15 11:54 342.6 many clouds 89.2
Diekirch 25May15 13:30 372.9 many clouds 82.3
Diekirch 24May15 12:22 345.6 many clouds 89.6
Diekirch 21May15 11:18 376.2 many clouds 100.0
Diekirch 20May15 10:08 411.1 many clouds 80.0
Diekirch 19May15 11:39 365.7 heavy clouds 81.0
Diekirch 18May15 11:14 322.1 some clouds 107.5
Diekirch 14May15 10:06 357.9 very hazy 82.8
Diekirch 13May15 10:39 370.3 blue sky 87.8
Diekirch 11May15 10:40 351.1 very hazy 74.4
Diekirch 10May15 12:13 349.7 many clouds 100.0
Diekirch 09May15 10:49 382.3 many clouds 91.6
Diekirch 08May15 10:45 368.2 very hazy 98.8
Diekirch 07May15 10:45 372.1 many clouds 84.0
Diekirch 06May15 10:00 363.8 many clouds 90.0
Diekirch 05May15 10:33 322.2 many clouds 85.4
Diekirch 29Apr15 10:41 369.0 many clouds 75.0
Diekirch 28Apr15 11:30 378.5 many clouds 75.1
Diekirch 24Apr15 09:37 385.7 blue sky 97.8
Diekirch 23Apr15 10:15 348.0 blue sky 93.1
Diekirch 22Apr15 10:23 353.1 light haze 98.4
Diekirch 21Apr15 10:13 342.0 light haze 89.7
Diekirch 20Apr15 10:18 398.1 some clouds 102.1
Diekirch 19Apr15 11:39 365.7 light haze 105.2
Diekirch 18Apr15 10:30 445.6 some clouds 97.5
Diekirch 14Apr15 10:43 340.2 light haze 84.0
Diekirch 11Apr15 12:22 297.1 very hazy 91.1
Diekirch 10Apr15 12:15 305.8 light haze 126.8
Diekirch 09Apr15 11:20 337.2 light haze 73.7
Diekirch 08Apr15 09:25 307.7 light haze 31.1
Diekirch 07Apr15 11:32 338.6 blue sky 92.0
Diekirch 05Apr15 11:41 342.3 heavy clouds 88.3
Diekirch 04Apr15 11:31 349.7 heavy clouds 75.0
Diekirch 02Apr15 12:11 325.6 heavy clouds 85.6
Diekirch 31Mar15 10:49 306.7 heavy clouds 81.7
Diekirch 30Mar15 11:09 326.9 many clouds 80.1
Diekirch 27Mar15 11:49 310.7 heavy clouds 72.6
Diekirch 26Mar15 10:39 346.3 many clouds 74.9
Diekirch 24Mar15 11:45 402.3 hazy 48.9
Diekirch 23Mar15 11:52 325.1 hazy 56.2
Diekirch 21Mar15 15:07 427.0 heavy clouds 50.3
Diekirch 20Mar15 12:30 366.8 hazy 53.3
Diekirch 18Mar15 12:10 355.0 hazy 58.3
Diekirch 17Mar15 12:33 372.0 blue sky 67.3
Diekirch 16Mar15 11:12 408.9 light haze 53.6
Diekirch 13Mar15 12:07 344.9 some clouds 62.4
Diekirch 12Mar15 12:47 337.9 blue sky 80.9
Diekirch 11Mar15 12:11 328.0 blue sky 71.9
Diekirch 09Mar15 12:19 338.4 many clouds 44.7
Diekirch 08Mar15 12:00 344.4 hazy 41.3
Diekirch 06Mar15 11:16 355.0 some clouds 49.7
Diekirch 05Mar15 13:13 360.8 heavy clouds 81.9
Diekirch 04Mar15 11:53 399.1 heavy clouds 71.6
Diekirch 02Mar15 12:06 376.7 many clouds 87.3
Diekirch 01Mar15 10:21 339.1 many clouds 67.5
Diekirch 28Feb15 11:38 313.3 many clouds 67.5
Diekirch 22Feb15 11:10 344.8 many clouds 64.0
Diekirch 15Feb15 13:09 374.1 light haze 42.4
Diekirch 13Feb15 11:57 354.8 heavy clouds 19.8
Diekirch 11Feb15 12:11 301.7 light haze 49.0
Diekirch 08Feb15 13:09 313.1 heavy clouds 86.9
Diekirch 07Feb15 11:10 304.9 blue sky 69.1
Diekirch 06Feb15 12:09 329.8 light haze 63.3
Diekirch 05Feb15 12:33 382.8 heavy clouds 45.7
Diekirch 01Feb15 11:55 427.7 heavy clouds 54.2
Diekirch 27Jan15 12:21 348.2 heavy clouds 78.7
Diekirch 21Jan15 12:02 370.9 heavy clouds 21.0
Diekirch 20Jan15 12:30 380.7 heavy clouds 52.3
Diekirch 18Jan15 12:15 418.6 very hazy 53.4
Diekirch 17Jan15 12:38 427.0 many clouds 56.3
Diekirch 14Jan15 12:42 445.3 heavy clouds 67.5
Diekirch 11Jan15 10:21 397.0 many clouds 73.7
Diekirch 04Jan15 13:29 299.4 many clouds 65.5

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).
From 01Jan to 31 July: The data in the table are the original readings multiplied by the calibration factor 0.908658  (new calibrated instrument_5375 = 0.908658*instrument_3012) . Comparison tests made from 15Sep to 02Oct 2009.
From 01Aug to end of the year: The data in the table are the original readings multiplied by the calibration factor 0.8822  (new calibrated instrument_5375 = 0.8822*instrument_3012) . Comparison tests made during June and July 2015.

 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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