Introduction to
UV radiation
monitoring
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Example of UV index and UV dose based on GOME
-- 1 June 2002
This pages shows as an example the different steps in the derivation of the
clear-sky erythemal UV index and the erythemal UV dose for 1 June 2002,
starting from the GOME total ozone columns. On the left are global pictures,
on the right the European area is shown.
World
| Europe
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Total ozone column in Dobson Units (DU) from the GOME Fast Delivery
service at KNMI for the 14 orbits of 1 June 2002. In the northern
summer measurements above the south pole are not possible.
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Assimilated total ozone field at local solar noon of 1 June 2002 in Dobson
Units (DU) based on the GOME Fast Delivery total ozone columns;
the resolution of these data is 1.25x1.25 degrees.
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Clear-sky erythemal UV index at local solar noon of 1 June 2002 (1 unit equals 25 mW/m2)
as derived from the GOME assimilated total ozone field at local solar noon; the
resolution is 0.5x0.5 degrees, i.e. about 50x50 km at the equatior.
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Erythemal UV dose for clear-sky conditions of 1 June 2002 in kJ/m2,
i.e. integrated
from sunrise to sunset, setting the cloud cover fraction at zero.
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(not available)
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Actual erythemal UV dose of 1 June 2002 in kJ/m2, using the 1-hourly Meteosat
cloud cover fraction (available only for the area used for HIRLAM,
a limited area weather forecasting system).
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(not available)
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Difference between the clear-sky and the actual erythemal UV dose of 1 June 2002
in kJ/m2.
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Some additional things regarding this example are on a separate page:
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last modified:
10 March 2009
