Year-to-Date UV Index Plots
The plots show the measured by Brewer spectrophotometers
UV index
values as a function of the season and the time of the day over
Canadian stations for the current year up to yesterday. The time
is shown as a solar time, i.e. the sun is in its highest position
over the horizon exactly at noon. The gray areas indicate periods
with no observations. The actual spectral UV data are available
(with some delay) from the
World Ozone and Ultraviolet Radiation Data Center (WOUDC).
UV Index forecast
for selected Canadian cities is available from the
Canadian Meteorological Centre (CMC).
Year-to-Date Ozonesonde Profiles
This section contains plots of the time-altitude
cross-section of the ozone partial pressure measured by ECC ozonesondes
at 10 Canadian stations. Ozone partial pressure is given in nanobars.
The actual data are available (typically, with one month delay)
from the
World Ozone and Ultraviolet Radiation Data Center (WOUDC).
Today's UV Index Plots
The UV index plots are based on ground-based measurements
by Brewer spectrophotometers carried out by
the Science and Technology Branch.
The actual measurements are indicated by red dots and the red line.
Estimates of UV Index for clear sky no-snow conditions and “normal” pre-1980 total
ozone values are shown by the blue line.
Estimates of UV Index for clear sky no-snow conditions and today's total
ozone values are shown by the magenta line.
If today's total ozone is normal the magenta line will cover the blue line.
The time is shown as both
local (in a time zone) and
solar (the sun is in its highest position over the horizon exactly at noon).
The plots are updated every five minutes.
You need to click on “Refresh” to see the updates.
Data