what is Beaufort scale? write briefly about the utility of this scale with example
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- What is beaufort scale ??
Ans.The Beaufort scale is a scale for measuring wind speeds.It is based on observation rather than accurate measurement. It is the most widely used system to measure wind speed today. The scale was developed in 1805 by Francis Beaufort, an officer of the Royal Navy and first officially used by HMS Beagle.
- Utility of Beaufort scale:
Ans. It is based on observation rather than accurate measurement.
The Beaufort scale, officially known as the Beaufort wind force scale, is a descriptive table. It depicts the force of wind by a series of numbers from 0 to 12. Actually, the Beaufort scale goes all the way to 17, but the last five numbers only apply to tropical typhoons. These numbers are only used in the areas around China and Taiwan.
The scale is named for Sir Francis Beaufort of the British Royal Navy. In 1805, he devised a method of describing wind force according to procedures for setting sails on a warship.
The Beaufort scale is useful for estimating wind power without wind instruments.
what each number indicates :
0: Calm and still.
Smoke rises vertically.
1. Light winds at 1-5 kph (1-3 mph).
Smoke drift shows wind direction.
2. Light breeze at 6-11 kph (4-7 mph).
Wind can be felt on face, flag ripples.
3. Gentle breeze at 12-19 kph (8-12 mph).
Flag waves.
4. Gentle breeze at 20-28 kph (13-18 mph).
Paper and leaves are scattered.
5. Fresh breeze at 29-38 kph (19-24 mph).
Small trees sway, whitecaps form on waves.
6. Strong breeze at 39-49 kph (25-31 mph).
Umbrellas are hard to use, large branches on trees move.
7. Moderate gale at 50-61 kph (32-38 mph).
Trees sway, walking in the wind is difficult.
8. Fresh gale at 62-74 kph (39-46 mph).
Twigs and branches break off of trees.
9. Strong gale at 75-88 kph (47-54 mph).
Roof tiles blow off buildings.
10. Whole gale at 89-102 kph (55-63 mph).
Trees are uprooted.
11. Storm at 103-118 kph (64-73 mph).
Widespread damage to vegetation and buildings, nearly no visibility at sea.
12. Hurricane at 119-220 kph (74-136 mph).
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Explanation:
The Beaufort scale is a scale for measuring wind speeds.It is based on observation rather than accurate measurement. It is the most widely used system to measure wind speed today. The scale was developed in 1805 by Francis Beaufort, an officer of the Royal Navy and first officially used by HMS Beagle
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