Today's Total Ozone and Ozone Deviations Maps
The total ozone and ozone deviation maps are based on ground-based measurements
by Brewer spectrophotometers carried out by
the Science and Technology Branch of Environment Canada.
Total ozone values are given in
Dobson Units.
The numbers represent observations taken from ground stations situated at the bottom left corner of the number.
The numbers marked by “*” symbol are obtained using indirect method of measurements and are less reliable.
Maps of deviations represent total ozone deviations from the 1978-1988 level estimated using
TOMS data.
These maps are normally updated
hourly between 1400 and 2300
UTC.
However, this near-real-time system is automated, so
if a system problem occurs outside of regular working hours, it will not be
fixed until the following work day.
Please, do not forget to press “Reload” (Netscape) or “Refresh” (Internet Explorer) to update pictures.
WARNING: The data are processed in near real-time,
have not been fully validated, and are preliminary.
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