Total Ozone Thickness 2020

jump straight-on to the data

Look here: 1. Intercomparison between the ozone measurements of the Microtops II and those made by the Brewer instruments at the RMI at Uccle: 2017, 2016, 2012, 2011, previous years.
2.
New: Plots of 2018 Uccle and meteoLCD total ozone measurements: series and calibration factor (Brewer MKIII_178 and Microtops 5375, same day direct sun measurements (180 days)
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, many years missing!)
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 NASA
Northern Hemisphere Ozone Map (not available) 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 Ozone&NO2
[ug/m3] **
Diekirch 01Jul20 13:11 293.0 heavy clouds 39.5
Diekirch 29Jun20 11:52 300.5 some clouds 82.0
Diekirch 25Jun20 11:01 303.6 blue sky 131.0
Diekirch 24Jun20 11:15 304.1 blue sky 128.2
Diekirch 23Jun20 10:51 298.8 blue sky 117.1
Diekirch 22Jun20 11:08 299.3 some clouds 74.9
Diekirch 21Jun20 11:20 308.4 many clouds 83.8
Diekirch 18Jun20 11:46 334.4 many clouds 83.3
Diekirch 16Jun20 11:09 325.6 heavy clouds 89.1
Diekirch 13Jun20 11:34 313.9 heavy clouds 104.9
Diekirch 10Jun20 10:48 333.6 heavy clouds 92.8
Diekirch 08Jun20 11:51 355.1 many clouds 93.6
Diekirch 06Jun20 12:01 333.1 some clouds 73.6
Diekirch 03Jun20 11:30 328.7 some clouds 133.5
Diekirch 02Jun20 11:15 313.5 blue sky 124.9
Diekirch 01Jun20 11:32 315.3 blue sky 104.5
Diekirch 31May20 11:16 321.7 some clouds 84.5
Diekirch 30May20 10:49 323.7 some clouds 97.9
Diekirch 29May20 11:36 329.6 some clouds 103.5
Diekirch 28May20 12:30 342.3 blue sky 96.8
Diekirch 27May20 11:12 315.4 blue sky 106.7
Diekirch 26May20 11:20 314.7 light haze 100.5
Diekirch 24May20 10:34 343.1 heavy clouds 70.0
Diekirch 22May20 10:52 294.9 very hazy 50.4
Diekirch 21May20 11:10 298.9 blue sky 118.7
Diekirch 20May20 12:20 300.5 many clouds 91.0
Diekirch 19May20 12:04 308.4 blue sky 117.6
Diekirch 18May20 11:01 311.9 blue sky 107.0
Diekirch 17May20 11:19 313.3 blue sky 99.3
Diekirch 16May20 10:09 328.3 blue sky 99.1
Diekirch 15May20 11:19 328.1 blue sky 87.0
Diekirch 14May20 11:47 334.1 many clouds 83.2
Diekirch 13May20 12:33 324.3 many clouds 87.4
Diekirch 12May20 11:24 353.1 blue sky 64.4
Diekirch 10May20 11:12 326.9 many clouds 93.6
Diekirch 08May20 11:21 322.1 hazy 140.0
Diekirch 07May20 11:18 331.2 blue sky 108.9
Diekirch 06May20 11:17 343.5 blue sky 92.6
Diekirch 05May20 11:20 337.5 some clouds 84.3
Diekirch 04May20 11:04 324.4 heavy clouds 71.5
Diekirch 03May20 12:11 340.0 many clouds 94.5
Diekirch 02May20 14:08 363.7 many clouds 90.1
Diekirch 01May20 10:26 367.2 some clouds 70.3
Diekirch 30Apr20 09:52 366.0 heavy clouds 69.8
Diekirch 29Apr20 11:06 344.6 some clouds 61.3
Diekirch 27Apr20 11:05 345.4 many clouds 98.9
Diekirch 26Apr20 10:58 353.1 blue sky 81.9
Diekirch 25Apr20 11:04 318.9 blue sky 53.0
Diekirch 24Apr20 11:22 302.6 light haze 105.5
Diekirch 23Apr20 11:29 305.2 blue sky 98.3
Diekirch 22Apr20 11:27 309.4 blue sky 91.2
Diekirch 21Apr20 11:03 321.9 some clouds 96.3
Diekirch 20Apr20 11:10 329.6 blue sky 98.4
Diekirch 19Apr20 13:30 328.7 some clouds 65.4
Diekirch 18Apr20 12:14 332.9 heavy clouds 74.2
Diekirch 17Apr20 11:13 336.5 some clouds 89.1
Diekirch 16Apr20 11:05 338.7 some clouds 80.8
Diekirch 15Apr20 11:03 300.0 many clouds 74.4
Diekirch 14Apr20 11:10 309.7 some clouds 67.1
Diekirch 13Apr20 11:02 334.9 light haze 55.1
Diekirch 12Apr20 11:00 319.5 blue sky 86.7
Diekirch 11Apr20 11:01 296.4 light haze 83.5
Diekirch 10Apr20 11:07 274.7 light haze 98.1
Diekirch 09Apr20 11:01 300.7 light haze 109.8
Diekirch 08Apr20 11:01 317.9 blue sky 84.2
Diekirch 07Apr20 11:00 287.3 blue sky 63.4
Diekirch 06Apr20 12:00 285.7 blue sky 92.9
Diekirch 05Apr20 11:51 291.5 blue sky 76.7
Diekirch 04Apr20 11:05 301.5 blue sky 64.2
Diekirch 02Apr20 11:24 338.8 blue sky 57.8
Diekirch 01Apr20 11:00 337.7 blue sky 61.7
Diekirch 31Mar20 11:16 355.8 many clouds 60.5
Diekirch 30Mar20 11:05 389.7 blue sky 60.9
Diekirch 29Mar20 07:19 315.2 heavy clouds 48.6
Diekirch 28Mar20 12:20 345.6 blue sky 81.8
Diekirch 27Mar20 13:26 366.4 blue sky 71.7
Diekirch 26Mar20 12:26 362.4 blue sky 66.4
Diekirch 25Mar20 12:24 332.8 blue sky 75.8
Diekirch 24Mar20 12:21 352.3 blue sky 72.1
Diekirch 23Mar20 12:09 371.2 blue sky 73.4
Diekirch 22Mar20 11:38 359.1 blue sky 74.3
Diekirch 20Mar20 11:49 304.8 some clouds 59.1
Diekirch 19Mar20 12:16 311.8 some clouds 92.7
Diekirch 17Mar20 11:21 341.2 many clouds 80.0
Diekirch 16Mar20 11:32 367.0 many clouds 65.0
Diekirch 15Mar20 13:31 342.7 heavy clouds 92.5
Diekirch 12Mar20 12:31 311.3 heavy clouds 95.0
Diekirch 08Mar20 12:22 355.7 heavy clouds 85.0
Diekirch 04Mar20 13:11 354.8 heavy clouds 62.3
Diekirch 01Mar20 13:02 332.6 many clouds na
Diekirch 28Feb20 13:00 281.2 many clouds 80.7
Diekirch 25Feb20 10:15 356.5 many clouds 92.5
Diekirch 21Feb20 12:25 306.6 many clouds 63.1
Diekirch 19Feb20 12:09 318.0 many clouds 73.0
Diekirch 17Feb20 12:30 319.5 many clouds 84.2
Diekirch 16Feb20 11:30 279.1 many clouds 70.5
Diekirch 15Feb20 12:36 294.8 many clouds 76.2
Diekirch 11Feb20 11:26 298.8 heavy clouds 83.1
Diekirch 10Feb20 12:13 309.7 heavy clouds 82.1
Diekirch 07Feb20 12:05 311.4 blue sky 40.0
Diekirch 06Feb20 12:12 325.2 blue sky 23.8
Diekirch 05Feb20 12:22 325.8 blue sky 83.0
Diekirch 04Feb20 12:06 406.8 heavy clouds 81
Diekirch 29Jan20 11:52 356.4 many clouds 80.2
Diekirch 28Jan20 11:49 426.5 heavy clouds 80.2
Diekirch 22Jan20 12:07 300.8 blue sky 27.5
Diekirch 21Jan20 12:06 333.0 blue sky 42.3
Diekirch 20Jan20 11:32 336.2 some clouds 64.9
Diekirch 18Jan20 12:28 412.5 heavy clouds 74.7
Diekirch 16Jan20 12:30 314.0 some clouds 59.7
Diekirch 15Jan20 12:07 317.3 many clouds 84.1
Diekirch 13Jan20 11:54 320.8 heavy clouds 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; 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:

1. Starting 01-May-2020 a new calibration factor of 0.9321 is applied to #3012 measurements by Mike Zimmer. This new factor is the result of a comparison made from 18 to 26 April 2020. #3012 readings multiplied by this factor are given in blue.

2. Green DU's correspond to a new calibration factor of 0.9422 applied to #3012 measurements by Mike Zimmer starting 02Jun16 ! This new calibration factor has been found by a new comparison over several measurements made from March to July 2016.


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!

(**) The O3&NO2 concentration is given for the actual temperature and pressure conditions. It is NOT corrected for STP conditions! As the NO2 concentrations is practically negligible (below the sensor threshold of 40 ug/m3, the readings should be taken as O3 concentration.

The "old" CAIRSENS O3&NO2 has been replaced by a new model the 15th May 2020. This new Cairsens seems to have a strong positive bias. As our O3 values are very close to those measured by the official station at Beckerich (confirmed by several comparisons), a calibration function will be applied in the datalogger starting 1st July. Correct_O3 = 1.074*reading - 36.309. This function as been applied to all the ground ozone values from 16 May to 29 June (numbers in red) which have not been corrected by the logger. Please read the NEWS from 1 July 20 for the various graphs.


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