Total Ozone Thickness 2009

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 and several satellites over the last 8 years.
2. Overplot of 2009 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)

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 = 4952' North 
longitude = 610'
altitude = 218 m a.s.l.
click to enlarge!

x   
Location Date UTC Time Thickness
[DU]
Sky Condition Ground ozone
[ug/m3]
Diekirch 28Dec09 11:51 388.1 heavy clouds 43.6
Diekirch 26Dec09 12:13 344.5 a few clouds 34.2
Diekirch 22Dec09 12:22 329.0 heavy clouds 41.2
Diekirch 19Dec09 12:19 342.3 blue sky 38.9
Diekirch 18Dec09 12:04 324.5 some clouds 44.0
Diekirch 17Dec09 12:06 255.0 blue sky 17.8
Diekirch 14Dec09 11:55 289.1 heavy clouds 39.5
Diekirch 13Dec09 10:34 314.4 heavy clouds 33.5
Diekirch 07Dec09 12:22 279.5 many clouds 41.6
Diekirch 04Dec09 12:06 301.6 heavy clouds 47.0
Diekirch 02Dec09 11:05 275.8 some clouds 24.1
Diekirch 25Nov09 11:00 239.6 some clouds 39.9
Diekirch 22Nov09 11:35 266.9 some clouds 65.0
Diekirch 19Nov09 13:40 262.4 blue sky 25.5
Diekirch 08Nov09 12:16 278.2 some clouds 46.2
Diekirch 04Nov09 12:08 308.7 heavy clouds 38.4
Diekirch 31Oct09 12:39 274.3 light haze 26.2
Diekirch 30Oct09 12:04 273.3 many clouds 18.4
Diekirch 29Oct09 13:33 262.7 very hazy 19.6
Diekirch 28Oct09 12:47 259.7 many clouds 10.2
Diekirch 27Oct09 12:12 262.9 some clouds 50.3
Diekirch 26Oct09 12:26 264.5 some clouds 38.5
Diekirch 25Oct09 12:15 275.1 heavy clouds 56.6
Diekirch 20Oct09 11:04 279.1 some clouds 44.0
Diekirch 19Oct09 11:05 281.7 blue sky 19.7
Diekirch 18Oct09 11:34 284.3 many clouds 40.0
Diekirch 17Oct09 10:49 306.8 many clouds 51.8
Diekirch 15Oct09 10:25 264.7 some clouds 42.6
Diekirch 14Oct09 11:15 264.3 some clouds 52.1
Diekirch 13Oct09 11:05 266.8 heavy clouds 59.2
Diekirch 12Oct09 11:21 278.3 many clouds 60.0
Diekirch 10Oct09 11:08 283.0 many clouds 55.7
Diekirch 09Oct09 11:08 276.1 many clouds 53.6
Diekirch 07Oct09 11:03 255.9 heavy clouds 31.2
Diekirch 03Oct09 12:45 278.7 heavy clouds 58.3
Diekirch 02Oct09 11:42 276.7 heavy clouds 51.6
Diekirch 30Sep09 12:26 270.8 heavy clouds 40.0
Diekirch 29Sep09 11:25 267.7 heavy clouds 40.2
Diekirch 28Sep09 11:16 270.5 very hazy 62.6
Diekirch 27Sep09 11:13 281.3 blue sky 88.6
Diekirch 26Sep09 11:16 287.9 blue sky 66.1
Diekirch 25Sep09 11:17 288.2 blue sky 68.7
Diekirch 24Sep09 11:49 281.6 some clouds 26.7
Diekirch 23Sep09 11:07 266.2 light haze 53.1
Diekirch 22Sep09 11:05 274.2 blue sky 57.9
Diekirch 20Sep09 11:16 302.9 light haze 93.2
Diekirch 19Sep09 11:12 286.3 many clouds 46.0
Diekirch 18Sep09 10:49 273.2 hazy 51.3
Diekirch 17Sep09 11:26 285.9 hazy 51.1
Diekirch 15Sep09 11:00 308.8 some clouds 48.4
Diekirch 11Sep09 10:42 327.7 heavy clouds 42.7
Diekirch 09Sep09 09:16 336.3 hazy 0.6
Diekirch 08Sep09 11:33 321.1 blue sky 38.2
Diekirch 07Sep09 11:06 333.4 blue sky 27.3
Diekirch 05Sep09 10:08 351.3 some clouds 45.7
Diekirch 31Aug09 11:12 309.0 blue sky 64.8
Diekirch 30Aug09 10:15 319.7 blue sky 47.3
Diekirch 27Aug09 11:07 318.3 many clouds 81.4
Diekirch 26Aug09 11:17 324.0 some clouds 65.9
Diekirch 24Aug09 11:08 322.2 blue sky 87.7
Diekirch 23Aug09 11:04 317.7 blue sky 92.9
Diekirch 22Aug09 12:24 338.7 some clouds 61.3
Diekirch 20Aug09 14:04 327.1 hazy 153.6
Diekirch 18Aug09 10:38 338.3 blue sky 77.4
Diekirch 17Aug09 11:15 341.2 very hazy 84.6
Diekirch 16Aug09 12:37 347.6 light haze 94.9
Diekirch 15Aug09 11:53 334.8 blue sky 93.2
Diekirch 25Jul09 11:58 382.0 some clouds 46.0
Diekirch 24Jul09 11:15 369.6 some clouds 53.6
Diekirch 23Jul09 11:50 374.3 many clouds 53.2
Diekirch 22Jul09 11:42 358.6 many clouds 68.4
Diekirch 21Jul09 11:39 358.5 some clouds 86.8
Diekirch 20Jul09 11:34 368.1 many clouds 53.7
Diekirch 19Jul09 11:01 382.6 blue sky 53.0
Diekirch 18Jul09 12:28 366.3 many clouds 50.4
Diekirch 17Jul09 11:20 353.8 heavy clouds 59.4
Diekirch 16Jul09 09:52 336.0 heavy clouds 65.8
Diekirch 13Jul09 11:19 342.2 many clouds 65.1
Diekirch 11Jul09 12:24 393.7 heavy clouds 60.3
Diekirch 10Jul09 11:17 404.1 heavy clouds 56.1
Diekirch 05Jul09 11:52 340.6 heavy clouds 117.5
Diekirch 04Jul09 11:21 329.6 blue sky 71.3
Diekirch 30Jun09 11:34 359.4 many clouds 131.8
Diekirch 29Jun09 10:17 355.7 many clouds 98.2
Diekirch 28Jun09 11:28 355.2 some clouds 90.0
Diekirch 26Jun09 08:34 359.6 many clouds 59.0
Diekirch 25Jun09 11:04 359.3 some clouds 92.3
Diekirch 23Jun09 10:24 375.0 some clouds 81.0
Diekirch 20Jun09 11:43 393.7 many clouds 56.2
Diekirch 19Jun09 10:14 366.7 many clouds 62.7
Diekirch 18Jun09 11:04 354.2 heavy clouds 65.8
Diekirch 16Jun09 11:04 386.3 some clouds 66.1
Diekirch 14Jun09 11:01 351.3 some clouds 104.0
Diekirch 13Jun09 11:17 346.9 many clouds 70.6
Diekirch 12Jun09 11:11 364.2 some clouds 84.9
Diekirch 09Jun09 11:00 413.6 many clouds 77.6
Diekirch 08Jun09 11:10 385.3 many clouds 82.8
Diekirch 03Jun09 11:08 368.0 many clouds 86.2
Diekirch 02Jun09 11:36 373.8 many clouds 108.6
Diekirch 01Jun09 11:06 394.7 some clouds 110.6
Diekirch 23May09 12:15 368.4 blue sky 109.2
Diekirch 22May09 11:06 396.6 blue sky 91.9
Diekirch 18May09 10:50 357.2 many clouds 75.3
Diekirch 17May09 12:11 357.7 some clouds 77.1
Diekirch 10May09 10:15 372.5 very hazy 74.8
Diekirch 04May09 11:03 396.2 many clouds 84.0
Diekirch 02May09 11:08 368.3 many clouds 96.2
Diekirch 01May09 09:27 419.0 blue sky 49.8
Diekirch 30Apr09 11:17 408.1 some clouds 75.0
Diekirch 26Apr09 11:07 399.7 many clouds 102.9
Diekirch 23Apr09 12:03 398.5 many clouds 82.5
Diekirch 21Apr09 11:13 382.8 blue sky 108.1
Diekirch 20Apr09 12:19 383.2 blue sky 97.5
Diekirch 19Apr09 11:06 414.4 many clouds 83.4
Diekirch 06Apr09 11:01 382.7 hazy 73.3
Diekirch 05Apr09 12:07 376.1 hazy 84.3
Diekirch 03Apr09 11:25 366.7 light haze 63.2
Diekirch 01Apr09 11:04 370.2 blue sky 87.3
Diekirch 31Mar09 11:01 410.1 blue sky 82.3
Diekirch 30Mar09 11:09 449.3 many clouds 66.6
Diekirch 29Mar09 12:49 479.5 many clouds 74.1
Diekirch 28Mar09 11:05 446.8 heavy clouds 83.4
Diekirch 27Mar09 11:25 424.7 heavy clouds 71.3
Diekirch 24Mar09 11:38 428.6 heavy clouds 61.7
Diekirch 21Mar09 13:16 373.1 blue sky 69.0
Diekirch 20Mar09 12:04 389.9 blue sky 75.9
Diekirch 19Mar09 11:37 379.9 light haze 51.1
Diekirch 18Mar09 11:12 345.9 light haze 63.1
Diekirch 17Mar09 11:38 311.1 hazy 46.1
Diekirch 16Mar09 12:30 339.2 many clouds 60.4
Diekirch 15Mar09 12:28 390.6 many clouds 71.2
Diekirch 14Mar09 12:05 356.4 heavy clouds 58.4
Diekirch 09Mar09 12:08 442.6 heavy clouds 63.6
Diekirch 07Mar09 12:11 382.7 some clouds 58.5
Diekirch 03Mar09 12:09 366.9 many clouds 37.6
Diekirch 01Mar09 13:43 376.4 very hazy 61.5
Diekirch 28Feb09 12:10 373.6 very hazy 38.2
Diekirch 15Feb09 12:09 415.5 very hazy 32.9
Diekirch 14Feb09 11:59 430.9 blue sky 47.1
Diekirch 12Feb09 13:04 464.5 many clouds 59.5
Diekirch 08Feb09 12:18 429.4 heavy clouds 48.5
Diekirch 01Feb09 10:55 426.3 many clouds 49.9
Diekirch 30Jan09 11:48 319.9 blue sky 29.5
Diekirch 29Jan09 12:42 326.6 light haze 32.3
Diekirch 28Jan09 11:45 322.9 hazy 10.9
Diekirch 27Jan09 11:24 385.1 hazy 7.8
Diekirch 26Jan09 12:19 538.7 very hazy 17.0
Diekirch 25Jan09 13:17 362.6 heavy clouds 45.2
Diekirch 24Jan09 12:14 362.0 heavy clouds 12:14
Diekirch 15Jan09 12:35 333.6 blue sky 11.2
Diekirch 12Jan09 12:07 313.6 light haze 7.3
Diekirch 11Jan09 12:00 338.3 blue sky 11.3
Diekirch 10Jan09 12:07 336.5 blue sky 13.3
Diekirch 09Jan09 12:08 356.7 blue sky 23.8
Diekirch 08Jan09 12:11 397.9 blue sky 37.9
Diekirch 06Jan09 12:07 338.9 blue sky 39.0

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!

Starting 01 May 2003, the Microtops #3012 has been replaced by a new instrument, serial #5375. 

Attention: blue lines correspond to measurements done using instrument #3012. The data in the table are the original readings multiplied by the calibration factor 1.02955
(instrument_5375 ~ 1.02955*instrument_3012)
. Comparison tests made during May and June 2009.

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.

Attention: dark green lines correspond to measurements done using instrument #3012 (operator Mike Zimmer) starting 19th Nov 09. The data in the table are the original readings multiplied by the calibration factor 0.9087
(instrument_5375 ~ 0.9087*instrument_3012)
. Comparison tests made during Sep and Oct 2009.
 


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