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Visibility II / V
In Riisitunturi in varying weather, farther on the horizon it was foggy / cloudy. The arc was drawn in a pretty clear landscape, but I guess it's a fog arc? Apparently not a rare phenomenon?
Riisitunturilla vaihtelevassa säässä, kauempana horisontissa oli sumuista/pilvistä. Kaari piirtyi aika selkeään maisemaan, mutta taitaa olla sumukaari? Ilmeisesti ei mikään harvinainen ilmiö?
Pilvikaari on harvinainen, pilviin piirtyvä väreiltään hailakka sateenkaaren sukulainen joka näkyy Aurinkoa vastapäätä. Pilvikaarta paras etsiä kun Aurinko on matalalla. Tällöin kaari on helpoiten nähtävissä sen noustessa verraten korkealle taivaalle.
Pilvikaarta ei tule sekoittaa sumukaareen joka muutoin on samanlainen ilmiö, mutta näkyy sumussa tai sumupilvessä.
Pilvikaari ei näy sateessa eikä sumussa, vaan se piirtyy pilven muotoihin. Kuva Mikko Peussa.
Kaaren yläosasta näkee, että kaari piirtyy pilven pisaroihin, eikä niinkään alempana olevaan sumuun. Hyvä esimerkki pilvikaaresta siinä mielessä.
Kiitos selvennyksestä Mikko. Onpas nyt opiskeltu vähän tätäkin laajaa aihetta kun alkoi kiinnostamaan. ????
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