Saharan dust and wildfire smoke from southern Europe darkened
the skies and turned the sun red in Sweden
On Tuesday morning 17th
of October unusual weather phenomena
could be seen in Sweden, with a much darker sky over Stockholm and a
subdued reddish orange sun in many parts of southern Sweden. Several
reports state a similar reddish sun was also observed in the Netherlands,
northern Germany and Finland, whilst it was seen over Great Britain the
day before. These phenomena were caused by a combination of Saharan dust
and smoke particles from the severe wildfires in Spain and Portugal, which
have been brought up with air masses influenced by large weather patterns
over central Europe and the Atlantic in connection to storm Ophelia. SMHI
states it is likely that the observed weather phenomena in Sweden are caused
by this event as well, while a passing thunderstorm additionally underlined
the apocalyptic impression in the Stockholm area.
is not conducting any aerosol measurements, data from
showed a peak of carbon monoxide (CO) early in the day on the
of October. This peak is likely correlated to the increased
levels of smoke, even though the measurements cannot distinguish which source
the detected CO originates from.
CAMS (Copernicus Atmosphere Monitoring Service) aerosol particle
forecast on Tuesday 17th between 00:00 and 06:00.
Actual satellite observations of aerosol concentrations from
OMI/AURA via FMI/KNMI/NASA/NSO on Tuesday 17th.
Carbon monoxide (CO) concentration measured at ICOS Sweden station
Hyltemossa on 16th and 17th of October, at the
heights of 30, 70 and 150 m. The picture shows the red sun which was
visible over Lund (photo: Tobias Biermann).