Ozone maps and graphs are also available from the
ARQX FTP site:
maps or
graphs.
Maps of Total Ozone and Ozone Deviations
File name is toyyyymmdd.gif or deyyyymmdd.gif, where
to means Total Ozone for the day,
de means Deviation from normal for the day,
yyyy is the year,
mm is the month (01 to 12),
dd is the day (01 to 31)
The numbers represent observations taken
from ground stations situated at the bottom left corner of the number.
Over areas with poor data coverage adjustments are made according to
TOMS on Earth Probe and TOVS on NOAA satellites. Total ozone values are in
Dobson Units,
deviations are in percent.
Total Ozone Time Series
The file name indicates the network
stations. Station location information is available from the
Canadian ozone page.
If the subdirectory is a year, the graphs show ozone for the
whole year. If the subdirectory is “current”, the graphs show
ozone for this year up to yesterday.
The graphs show daily mean total ozone values
(in Dobson Units)
as a function of the season over Canadian stations for the current year up to
yesterday.
The results of most accurate Brewer direct sun measurements
are shown in red, all other types of data are shown in blue.
The green
line indicates total ozone values smoothed by one month running mean.
The dashed lines represent “normal”, pre-1980 total ozone
annual cycle and two standard deviations envelope for daily mean total
ozone.
The actual data are available (typically, with one month delay)
from the
The World Ozone and Ultraviolet Radiation Data Centre
(WOUDC).
UV Index Plots
The file name indicates the network stations.
Station location information is available from the
Canadian ozone page.
If the subdirectory is a year, the graphs show UV indices for the
whole year. If the subdirectory is “current”, the graphs show UV
indices for this year up to yesterday.
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 Centre
(WOUDC).
Daily Maximum UV Index Plots
The file name indicates the network
stations.
Station location information is available from the
Canadian ozone page.
If the subdirectory is a year, the graphs show UV indices for
the whole year.
If the subdirectory is “current”, the graphs
show UV indices for this year up to yesterday.
The daily maximum
UV index
plots are based on ground-based measurements
by Brewer spectrophotometers
The actual measurements are indicated by the red dots.
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 each day's total
ozone values are shown by the magenta line.
Today's UV Index Plots
The file name indicates the network stations.
Station location information is available from the
Canadian ozone page.
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 time (in a time zone) and
solar time (the sun is in its highest position over the horizon exactly at noon).
The plots are updated every five minutes.
It is necessary to click on "Refesh" to see the updates.
|