Take note that contrails are distinctive compared to grayish "vapor trails" at times found when flying lower with flaps extended. They're formed of liquid water from the rapid decompression and cooling of air above the wings. Albedo refers back to the level of gentle radiation that's reflected again into space. https://funktionsgeber-zweikanal99988.free-blogz.com/84944186/the-strahlen-waffe-diaries