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Шкала Бофорта для определения силы ветра

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Сила ветра целиком зависит от его скорости. Поэтому установить точно силу ветра можно, измерив его скорость каким-нибудь специальным прибором.

Силу ветра определяют в баллах по так называемой шкале Бофорта. При некотором опыте можно определять балльность ветра без приборов, по непосредственному ощущению и по признакам, указанным в таблице:

Шкала Бофорта для определения силы ветра.

Балл Обозначение ветра Опознавательные признаки Скорость ветра, м/с
0 Затишье Совершенное затишье 0
1 Легкое дуновение Дым поднимается почти вертикально 1,7
2 Легкий Для ощущения едва заметен 3,1
3 Слабый Шевелит легкий вымпел и листья на деревьях 4,8
4 Умеренный Вытягивает вымпел и шевелит маленькие ветви деревьев 6,7
5 Свежий Шевелит большие ветви деревьев 8,8
6 Сильный Слышен в домах; шевелит тонкие стволы деревьев 10,7
7 Жестокий Шевелит более толстые стволы деревьев, на стоячей воде поднимает опрокидывающиеся волны 12,9
8 Бурный Шевелит вековые деревья; идущий против ветра человек заметно задерживается 15,4
9 Шторм Легкие предметы (черепицы крыш и т. д.) вырывает из своих гнезд 18
10 Полный шторм Вырывает деревья 21
11 Тяжелый шторм Разрушающее влияние на всякого рода постройки 38
12 Ураган Действие опустошающее 40

загрузок 24147 (размещено 1 Января 1970)

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