A daytime region of the Earth’s ionosphere beginning from approximately 40 km to 90 km altitude. Radiowave absorption in layers in this region can be significantly increased in response to increased i
onization associated with solar x-ray flares.
Sea ice that was earlier at the flooded ice stage, from the surface of which melt-water has disappeared after the formation of cracks and thaw holes. During the period of drying, the surface whitens.
Sea ice from the surface of which meltwater has disappeared after the formation of cracks and thaw holes. During the period of drying, the surface whitens.
Sea ice from the surface of which meltwater has disappeared after the formation of cracks and thaw holes. During the period of drying, the surface whitens.
Sea ice terminology that describes an ice surface from which water has disappeared after the formation of cracks and thaw holes; during the period of drying the surface whitens.