Beaufort Scale of Wind 蒲福风力等级表 （航海英语）

Beaufort Scale of Wind 蒲福风级表

Beaufort Scale Description Wind speed(knot)

0

Calm 无风

<0

Sea like a mirror

1

light air 软风

1-2

Ripples but without foam crests

2

Light breeze 轻风

3-6

Small wavelets. Crests do not break

3

Gentle breeze 微风

7-10

Large wavelets. Perhaps scattered white horses

4

Moderate breeze 和风

11-15

Small waves. Fairly frequent white horses

5

Fresh breeze 清风

16-20

Moderate waves, many white horses

6

Strong breeze 强风

21-26

Large waves begin to form; white foam crests,probably spray

7

Near gale 疾风

27-33

Sea heaps up and white foam blown in streaksalong the direction of the wind

8

Gale 大风

34-40

Moderately high waves, crests begin to break into spindrift

9

Strong gale 烈风

41-47

High waves. Dense foam along the direction ofthe wind. Crests of waves begin to roll over. Spray may affect visibility

10

Storm 狂风

48-55

Very high waves with long overhanging crests. The surface of the seatakes a white appearance. The tumbling of the sea becomes heavy and shocklike. Visibility affected

11

Violent storm 暴风

56-63

Exceptionally high waves. The seais completelycovered with long white patches of foam lying inthe direction of the wind. Visibility affected

12

Hurricane 飓风

≥64

The air is filled with foam and spray. Sea completely white with driving spray. Visibility very seriously affected

蒲福风级（Beaufort scale）是国际通用的风力等级，由英国人弗朗西斯·蒲福（Francis Beaufort）于1805年拟定，用以表示风强度等级。风力等级简称风级，是风强度（风力）的一种表示方法，故又称“蒲福风力等级表”。它最初是根据风对地面物体或海面的影响大小分为0—12级， 共13个等级。 自1946年以来，风力等级又作了扩充，增加到18个等级（0—17级）。蒲福风级表最开始时只运用于海上，经改良后也可用于陆地。1947年第12届国际气象台长会议上被正式承认。