biosphere is the main recording name of geir jenssen (born 30 may 1962), a norwegian musician who has released a notable catalogue of ambient electronic music. he is well known for his works on ambient techno and arctic themed pieces, his use of music loops, and peculiar samples from sci-fi sources. his 1997 album substrata was voted by the users of the hyperreal website in 2001 as the best all-time classic ambient album.