| 释义 |
okta Meteorol.|ˈɒktə|
[f. octa- by alteration.]
(See quot. 1950.)
1950Meteorol. Gloss. (Meteorol. Office) (ed. 3) Amendment List No. 4. 7 Okta, unit, equal to area of one eighth of the sky, used in specifying cloud amount. 1957Weather Map (Meteorol. Office) (ed. 4) iv. 35 From January 1, 1949, cloud amount has been observed and reported in oktas or eighths of sky covered, code figure 0 representing a clear sky, 1 representing 1 okta (eighth) of sky covered or less, but not zero, 2 representing 2 oktas (eighths), and so on..8 representing 8 oktas (eighths) (sky completely covered), and 9 representing sky obscured or cloud amount cannot be estimated. 1960Handbk. Aviation Meteorol. (Meteorol. Office) xii. 178 The number of oktas of sky covered by any particular cloud layer is estimated as if no other clouds were present. 1961C. E. Wallington Meteorol. for Glider Pilots iii. 38 Cloud amount is usually reported in eighths of the sky covered... Sometimes the internationally convened word ‘oktas’ is substituted for ‘eighths’. 1977‘J. Le Carré’ Hon. Schoolboy xviii. 455 Cloud is anticipated at six to seven okta... One okta is one eighth of sky area covered. |