Statements (23)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:cloud_service
|
| gptkbp:alsoKnownAs |
noctilucent clouds
|
| gptkbp:appear |
before sunrise
after sunset |
| gptkbp:cause |
extremely low temperatures
|
| gptkbp:color |
silvery blue
|
| gptkbp:composition |
water ice crystals
|
| gptkbp:discoveredBy |
1885
|
| gptkbp:elevation |
76 to 85 kilometers
|
| gptkbp:firstObserved |
gptkb:Europe
|
| gptkbp:formAbove |
polar regions
|
| gptkbp:hasViewOf |
summer months
high latitudes |
| https://www.w3.org/2000/01/rdf-schema#label |
polar mesospheric clouds
|
| gptkbp:location |
mesosphere
|
| gptkbp:reflects |
sunlight
|
| gptkbp:relatedTo |
climate change
upper atmosphere |
| gptkbp:studiedBy |
satellites
ground-based observations |
| gptkbp:visibleWhen |
twilight
|
| gptkbp:bfsParent |
gptkb:AIM_(Aeronomy_of_Ice_in_the_Mesosphere)
|
| gptkbp:bfsLayer |
7
|