Cirriform Rotor Cloud Observed on a Canadian Arctic Ice Cap

Hisashi Ozawa, Kumiko Goto-Azuma, Koyuru Iwanami, Roy M. Koerner
1998 Monthly Weather Review  
A thin rotor cloud was observed on the lee side of Penny Ice Cap in the Canadian Arctic on 21 April 1996. The cloud consisted of thin cirriform layers, so that its motion was clearly observed. By means of time-lapse camera photography, the velocity of the cloud rotation was estimated to be around 2 m s Ϫ1 . It is suggested that the existence of a high humidity layer at the bottom of an inversion layer is a key factor for the formation of the thin rotor cloud.
doi:10.1175/1520-0493(1998)126<1741:potmcr>;2 fatcat:pbixg2dkijc5tcrpxcvaxsfz4q