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NDACC Spectral UV Instrument Working Group
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Long Term Changes in UV
Long Term Changes in UV
The plot below illustrates that compared
with seasonal and geographic differences in UV radiation, any trends at these
three NDACC sites due to long-term ozone changes have been small since the 1990s
when measurements began. Note that at Lauder prior to 1998 observations were
not taken during precipitation, so the mean daily doses for this period are
larger than for subsequent periods.
Figure. Time series of erythemally weighted UV at three NDACC sites
Page last modified: Thursday, 12-Nov-2009 21:19:52 UTC
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