POLAR STRATOSPHERIC CLOUDS over the Netherlands !
Taken by Jacob Kuiper on December 25, 2018 @
Steenwijk, The Netherlands
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Details:
This Christmas morning in a bright blue sky over the northern part of the Netherlands, quite 'wavy' Cirrus clouds drifted from north to south. The undulated pattern in these Cirrus-like clouds were quite rare. Than some nice coloured lenticular shaped clouds appeared in these waves. At that moment I realized that these clouds were no normal Cirrus clouds but very much higher, polar stratospheric clouds. At February 2nd 2016 I had seen this type of PSC also but then low over the south-western horizon. Now at least 1/8 to 1/4 of the sky was covered with this undulated cloud pattern. As meteorologist I have watched the temperatures around the 30 HectoPascal level (around 22 km). At this moment, there we should find temperatures around -76 degrees Celsius. That's 7 degrees warmer than in 2016 at that level. But at height around 30 kilometres the air is much colder over this part of NW-Europe. Probably cold enough to form the extensive PSC-field. As far as I know this is the third case of PSC type I that has been observed over the Netherlands in the last 35 years.
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