Nacreous Clouds - take 2
Skien, Norway
Saturday, January 19th 2008, 18:16 CET
Finally another sighting of those rare nacreous clouds. More on flickr .
Finally another sighting of those rare nacreous clouds. More on flickr .
Had a very interesting chat with Douglas Crockford over dinner about JavaScript and links with history and PHP.
Made it to the hotel. Where are people at? #phpday
Mysteriously, my flight is not known to the computer system and doesn't appear on any screens. It's got a confirmed gate though
Not a fan of FCO.
Scheming what article to write next. I think it will be "Using MongoDB to store and query OpenStreetMap data".
On my way to LHR for LHR -> FCO -> VRN. #phpday
Shoreditch mapping party #1: Building outlines
We (10gen) are looking for a Solutions Architect in Ldn. Check it out! http://t.co/6okru0r5 #job
Fixed rail bridges
Stables Market
New blog post: "Ignite London: Crowd Sourcing a Map of the World": http://t.co/7uvyuOr5 #igniteldn6 #openstreetmap
New blog post: "Ignite London: Crowd Sourcing a Map of the World": http://t.co/9KusXoh2 #igniteldn6 #openstreetmap
Why Nikola Tesla was the greatest geek who ever lived: http://t.co/0dRDtDEo #linktuesday
Messing about with wireshark to analyse the MongoDB wire protocol... fun evening!
Way to go Outlook… saying 10 GMT when you mean 10 BST and *even* mentioning "The GMT offset above does not reflect DST adjustments" o_O
Added Plaza Parade
Comments
Is this related to the northern light effect?
No, not linked at all. Northern lights are caused by particles from the Sun, while this type of clouds is still unclear what it actually is. NASA just launched a mission to found out more about it (http://en.wikipedia.org/wiki/Aeronomy_of_Ice_in_the_Mesosphere).
Nacreous clouds or mother of pearl clouds will only be seen just after sunset or before sunrise, they form in the stratosphere at heights of between 6-18 miles when the temperature there falls below -80°C and are ‘probably’ composed of ice particles with a liquid coating of nitric acid tri-hydrate. They appear bright because they are high enough to be illuminated by the sun long after local sunset and the pastel colours arise through diffraction or interference effects in much the same way that colours appear in a film of oil on a puddle of water. Aurora borealis (northern lights) & aurora australis is the emissions of photons in the Earth's upper atmosphere & not connected to these clouds formations.
Rob Benedict (UK)
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