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Term: Polar mesospheric clouds Class:  
 vernacular   (0%)
Created 6 June 2017
Last modified 6 June 2017
Contributed by GCW Glossary

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  n2t.net/ark:/99152/h3073

Definition: Cirrus-like clouds seen from spacecraft over the polar regions during summer in both hemispheres. (Abbreviated PMC.) They occur near the mesopause, at heights of roughly 85 km, and are closely related to noctilucent clouds.  AMSglossary 

 GCW 
Examples: