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:
2. Overplot of 2017 (new!) Uccle and meteoLCD total ozone 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, many years missing!)
4. Older dobson files are in the data archive
|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!|
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!
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!
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