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1.Classification The intensity of tropical cyclones varies greatly. Accordingly, the international standards for the naming and grading of tropical cyclones are:
1) Typhoon (hurricane): the maximum wind speed near the center of the ground is 12 or more).
2) Tropical storm: The maximum wind speed near the center of the surface is 8-11). Among them, the maximum wind speed near the center of the ground is 10-11), which is called a severe tropical storm.
3) Tropical depression: maximum wind speed near the center of the surface 6-7).
Since 1989, we have adopted international regulations. Previously, China's meteorological department had stipulated that the maximum wind speed near the center of the ground in a tropical cyclone, that is, the wind force of 8-11) is called a typhoon; maximum wind speed wind force 12 or more) is called a strong typhoon; The maximum wind speed and wind force are 6-7) is called a tropical depression.
Tropical storms and typhoons with strong winds are often named or numbered to better identify and track strong winds. China's meteorological department stipulates that all tropical storms and typhoons that occur west of 150°E longitude and north of the equator are numbered in the order of their occurrence each year. For example, Tropical Storm 9306, Severe Tropical Storm 9304, and Typhoon 9302 represent Tropical Storm No. 6, Severe Tropical Storm No. 4, and Typhoon No. 2 that occurred west of 150°E in 1993.
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Let's take Sangmi this time.
This year's No. 8 typhoon "Sangmei" reached Taishan, Fuding City, Fujian Province.
The maximum wind force in the center of the island reached 19 at the moment. At 5:25 p.m., "Sangmei" made landfall in Cangnan County, Wenzhou, Zhejiang, with a wind speed of 60 meters per second at the time of landfall
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1. [Classification] -- Beaufort Typhoon Scale] -- Meter Seconds [Kilometers and Hours] Mild Typhoon [Category 8 and Category 11 Winds] 63 117 ] Moderate Typhoon Levels [Category 12 and Category 15 Winds].
Strong typhoon] [Wind force 16 or above].
2.The U.S. Joint Typhoon Warning Center (one-minute average wind speed) classification] -- barometric pressure (mbarmb)】【knot hr )】depression (td)】34].
tropical storm (ts)】-34~63】typhoon (1)】-980】--64~82】typhoon (2)】-980~965】--83~95】typhoon (3)】-965~945】--96~113】typhoon or super typhoon (4)】-945~920】--114~135】
super typhoon (5)】-920】--135】3.Hong Kong Observatory (10-minute mean wind speed).
-Grading] --Kilometers and Hours
Tropical Depression (TD)]-62].
Tropical Storm (TS)] -63 87 ].
Severe Tropical Storm (STS)] -88 117].
Typhoon (TY)] -118].
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Typhoon Taipei. The strongest typhoon in history, Category 21, is called Typhoon Taipei. Typhoon Taipei is the strongest super typhoon on record in the world, with an intensity of 21.
Taipei Typhoon Introduction:Taipei, known as the strongest typhoon in history, this typhoon occurred on October 4, 1979, and disappeared completely on October 24, 1979. According to the data, 110 people were killed, 543 injured and another 5 people were missing in Japan.
Tens of thousands of people were affected, and thousands of other houses collapsed.
Taipei formed around **, and this time the typhoon was the strongest of all records so far, and it was also the most destructive of any typhoon. Although the relevant departments issued an early warning at that time, it still caused a large number of personnel and property losses to the affected area.
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According to the notice of the China Meteorological Administration on the implementation of the national standard for tropical cyclone classification GBT 19201-2006, tropical cyclones are divided into six levels according to the maximum wind force on the ground near the center
Tropical depression – winds of magnitude 6 and 7 near the centre, or gusts of 7 or more.
Tropical storm – winds of force 8 and 9 near the center, or gusts of force 9 and may continue.
Severe Tropical Storm – Winds of force 10 11 near the centre, or gusts of force 11 and likely to continue.
Typhoon – winds of 12 13 near the center, or gusts of 13 and likely to continue.
Strong typhoon – winds of 14 15 near the center, or gusts of 15 and likely to continue.
Super typhoon – winds of 16 or above near the centre, or gusts of 17 and trembling may continue.
Typhoons are classified according to the strength of the wind, and the higher the wind level, the higher the typhoon level. Wind force refers to the mechanical force obtained from the wind, which is simply explained as the force of the wind. The wind rating is based on the speed of the wind, and the faster the wind speed, the higher the wind rating.
When the wind reaches 6 or more, it is a strong wind, and this level of wind has a certain power, and when the wind level reaches 12 or more, it can be completely called a typhoon. Typhoons have a very destructive power, and whenever a typhoon appears, it is accompanied by heavy rain, causing great trouble to human society.
Formation of typhoons.
The formation of a typhoon requires the following conditions: the sea surface water temperature is above; a certain initial perturbation of positive vorticity; The ambient wind has less shear in the vertical direction; Low pressure or cloud disturbances at least a few degrees of latitude from the equator. Since the formation of typhoons is not well understood today, the above list is only necessary for the formation of typhoons.
The initial stage of a typhoon is a tropical depression, from the initial low pressure circulation to the maximum average wind force near the center of the eight, generally takes about 2 days, the slow one takes three or four days, and the fast one only takes a few hours. During the development phase, the typhoon continuously absorbs energy until the central pressure reaches the lowest value and the wind speed reaches the maximum. After the typhoon makes landfall on land, it will be affected by the combined impact of ground friction and lack of energy, and the typhoon will quickly weaken and die.
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Typhoons are a category of tropical cyclones. The largest typhoon scale at the moment.
is level 17. Typhoons can be divided into typhoons, strong typhoons and super typhoons according to the grinding source level.
Winds near the center of the typhoon are 12 to 13, or gusts.
Level 13 and may last. Strong typhoon – winds of 14 15 near the center, or gusts of 15 and likely to continue. In the vicinity of Super Typhoon, winds of 16 or above, or gusts of 17 and can be touched.
In general, a typhoon blue warning signal will be issued if it is likely to be affected by a tropical cyclone within 24 hours, and the average wind force along the coast or on land reaches 6 or above, or gusts of 8 or more and may continue.
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Category 16 typhoon with a wind speed of 52 meters to 59 meters per second, category 16 typhoon is a super typhoon, also known as super typhoon or super strong typhoon, the abbreviation of China Meteorological Administration superty, the abbreviation of Hong Kong Regional Observatory supert, and the abbreviation of the United States Joint Typhoon Warning Center STY.
A super typhoon is defined as a maximum mean wind speed of 16 or above near the center of the bottom layer, which is the most violent classification of tropical cyclones in the northwest Pacific, i.e. as low as 115 knots near the maximum sustained wind speed of the center and as high as or more than 185 knots. This kind of wind is rare on land, and it is very bad. At sea, the waves are extremely large waves of more than 14 meters or more, foaming at the sky, and visibility is very low.
Therefore, the wind strength of the typhoon is significantly worse, and its destructive power is catastrophic.
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Category 12 typhoon with wind speeds up to. Typhoons have a wind scale of 12-13. Wind speed per second meters to meters.
According to the regulations of the World Meteorological Organization, a tropical cyclone with a continuous wind cavity of 12 to 13 is called a typhoon or hurricane, and the name of the hurricane is used in the western and eastern Pacific Oceans of Peking University.
Structure of a typhoon: A typhoon is a deep system of depression with a very low central pressure, with significant convergence towards the center in the lower layers and a major outward divergence at the top. If you cut the typhoon horizontally, you can see that there are three distinct areas, from the center to the outward
Typhoon eye area, cloud wall area, spiral rain belt area.
Typhoon structure: A typhoon is a deep depression system with a very low central pressure, with significant convergence towards the center at the lower level and major outward divergence at the top. If you cut the typhoon horizontally, you can see that there are three distinct areas, from the center to the outward
Typhoon eye area, cloud wall area, spiral rain belt area.
Typhoon Precautions:
Listen, watch or check the typhoon warning information on the Internet in time to understand the best anti-typhoon action countermeasures.
Close doors and windows tightly, and fasten structures that are easily blown by the wind.
Move from a dilapidated house to a safe place.
People in low-lying areas that may be flooded should be evacuated in a timely manner.
Check whether the electrical circuit, furnace, gas and other facilities are safe.
Kindergartens, primary and secondary schools should take temporary shelter measures and suspend classes when necessary.
Open-air group activities or large-scale indoor gatherings should be canceled in a timely manner, and evacuation should be done.
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Category 11 winds are measured in meters and seconds or 103-117 km-h. The force of 11 winds can be called a storm quickly, and the physical phenomenon caused by it on the land ground is that it can uproot trees, causing major damage to buildings on the ground; Using the sea surface as a reference, it can cause high wind and waves from meters to 16 meters.
The wind level starts from 0 to 17 or above, and the level of increase according to the number of gods is getting higher and higher, and the customs and the harm caused are also increasing. Generally speaking, strong winds of 10 or higher on land are rare.
Extended information: 1. Formulas for calculating wind speed:
1. "From all the way to nine, multiply 2 by all levels". Meaning: from the first level to the ninth level of the wind, multiply each stage by 2, and the maximum speed of the wind can be roughly obtained. For example, the maximum speed of a Category 1 wind is 2 meters per second, a Category 2 wind is 4 meters per second, a Category 3 wind is 6 meters per second, and so on.
2. There are transition numbers between all levels of wind, such as 1-2 meters per second for level 1 wind, 2-4 meters per second for level 2 wind, and 4-6 meters per second for level 3 wind.
2. Definition of typhoon by China Meteorological Administration:
Typhoons of magnitude are set at meters and seconds; Level 13 is the meter second.
The stage is meter-second, and the 15-level is meter-second.
The stage is in meters and the 17 levels are in meters.
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A Category 11 typhoon is very powerful, with winds of about 103 117 kilometers per hour, which can make the trees shake very badly.
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I can blow off a big tree, and I can blow down a house.
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The wind is very strong, and it can bring disasters to human beings, and houses collapse. Everybody is afraid.
110km h=110000 (60*60)(m s)=10-11 grades.
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