Re: Scie chimiche: Galleria fotografica

Inviato da  ivan il 28/2/2007 22:37:59
Da APOD




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What could create a huge hole in the clouds? Such a hole, likely hundreds of meters across, was photographed last month from a driveway near Mobile, Alabama, USA. Very unusual to see, hole-punch clouds like this are still the topic of meteorological speculation. A leading hypothesis holds that the hole-punch cloud is caused by falling ice-crystals. The ice-crystals could originate in a higher cloud or be facilitated by a passing airplane ...


Messaggio orinale: https://old.luogocomune.net/site/newbb/viewtopic.php?forum=60&topic_id=2932&post_id=79992