Zhubov scale

The Zhubov scale is a way of reporting polar sea ice coverage.^[1][2]

It was developed in the former USSR by Russian naval officer N. N. Zhubov (1895–1960) as a way for Soviet officers to describe ice coverage.^[3][4]

The Zhubov scale is measured by using the unit ball, one ball equals 10% coverage, five balls 50% coverage and so on, with a total of ten unit balls being possible.^[4][2]

1. ^ Joseph, Christopher (2022-04-12). How to Measure Anything. London: Ivy Press. p. 40. ISBN 978-0-7112-6803-6.
2. ^ ^{a b} Jerrard, H. G. (2013-03-09). A Dictionary of Scientific Units. Springer Science & Business Media. p. 165. ISBN 978-94-017-0571-4.
3. ^ Fairhall, David (1971). Russian Sea Power. Boston: Boston : Gambit. p. 37. ISBN 978-0-87645-040-6.{{cite book}}: CS1 maint: publisher location (link)
4. ^ ^{a b} Gyllenbok, Jan (2018-04-11). Encyclopaedia of Historical Metrology, Weights, and Measures. Cham: Birkhäuser. p. 237. ISBN 978-3-319-57598-8.

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