Grethe Rytter Hasle | |
|---|---|
| Born | 3 January 1920 |
| Died | 9 November 2013 (aged 93) |
| Citizenship | Norwegian |
| Alma mater | University of Oslo |
| Scientific career | |
| Fields | planktology |
| Institutions | University of Oslo lecturer 1961–1977 professor 1977–1990 |
| Academic advisors | Trygve Braarud |
| Author abbrev. (botany) | Hasle |
Grethe Berit Rytter Hasle (3 January 1920 – 9 November 2013) was a Norwegian planktologist. Among the first female professors of natural science at the University of Oslo, she specialized in the study of phytoplankton.