POLAR MESOSPHERIC CLOUDS
type: Concept
change note: 2013-03-20 15:33:12.0 [mpmorahan] insert Definition (id: null text: are a diffuse scattering layer of water ice crystals near the summer polar mesopause. language code: en);
change note: 2013-02-12 11:06:27.0 [mpmorahan] Insert Concept add broader relation (POLAR MESOSPHERIC CLOUDS [0a7f50ce-4968-46c8-86a6-23ea13c1830c,82139] - MESOSPHERIC CLOUDS (OBSERVED/ANALYZED) [04bc6942-12e0-413f-94d2-1ba7f5edf595,82119]);
in scheme: sciencekeywords
definition: are a diffuse scattering layer of water ice crystals near the summer polar mesopause.

MESOSPHERIC CLOUDS (OBSERVED/ANALYZED)
type: Concept