Scientists from the meteorological community, after storms like Katrina Hurricane, who brought death to more than thousands of Americans across the Americas, still have many questions about how large hurricanes appear.
Each year, during the five-month period starting from the beginning of June and continuing until the end of November, about 60 low-pressure rainfalls are flowing from the West African coast to the east coast of North America.

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Only some of these low-pressure fronts end up in the hurricane, most of them in the form of monsoon storms in the western Atlantic and the east coast of the United States.

Researchers say that in order to convert a low pressure air to a large storm, various conditions such as passing through warm water, high humidity and the difference in surface temperature with higher levels of the atmosphere are needed.

Still, some of the factors contributing to the storm are unknown.

The US Space Agency, along with its Meteorological Organization, has recently launched a $ 4.7 million plan for a larger study of large storms to help them figure out.

What is the hurricane?

Hurricanes or severe tornadoes in the North Atlantic, which each year vary with severity and weaknesses of the Caribbean and South American coastlines, can produce winds of more than 300 kilometers per hour.

"Hurricane" is a special name that refers to the tropical strong whirlwinds in the North Atlantic, the northeast Pacific Ocean in the east of the time line, and the South Pacific Ocean in the east of 160 degrees East.

Similarly, the tornadoes in other parts of the world have other names, such as Taifon in the northwest of the Pacific in the west of the time line, the "tropical tornado" (in the southwest of the Pacific in the west of 160 degrees East or in the Indian Ocean in the east of the 90th East ), "Severe Tornadoes" (in the North Indian Ocean) and tropical tropical turbot (in the southwest of the Indian Ocean).

The root of the word "Hurican" is Hurrican goddess of Caribbean, also called the "Hurakan" goddess of Maya.

According to the extinct people of Maya, Horacan, who is one of the creator gods, breathed his fierce breath into turbulent waters, causing the earth to descend from under water, and destroyed the forest men by a huge storm and flood.

How does hurricane come from?

Haricin is formed in warm and humid weather, but many factors must be handled to form a hurricane. Scientists do not know why all these factors should exist for the creation of a hurricane, but they know that these factors are very important.

A study found that only 60 of the 608 conditions that could have been storm-driven were Hurricane.
An important factor in the formation of hurricanes is the creation of a low pressure region on a large surface of warm water.

The air coming to the center of the low-pressure region becomes curved as a result of the effect of Coriolis Coriolis.
In this way, the air is rotated in the hurricane.
The heat produced by the time of compression of the water causes the air to warm up in the upper part and increase the pressure. Because of the high pressure area, the air in the central part or the "eye" of the hurricane is desirable. This situation is the beginning of a feedback mechanism that continually intensifies as long as there is warm water and the hurricane consumes it.

When the hurricane crosses the earth, much of the energy from the ocean is no longer in use, and other feedback does not exacerbate the storm. The hurricane continues to lose energy as it continues to move on the ground and eventually fades away.

What is the Hurricane Katrina?

The Katrina tropical storm is flowing from the southern coast of the United States with steep rains and rains.

This violent hurricane storm, which screwed up in a huge circle and collapsed after crossing the Gulf of Mexico in the states of Mississippi, Alabama and Louisiana, suffered widespread damage.

Katrina swallowed residential neighborhoods in New Orleans under the water and left a piece of the roof of a super dome that many townspeople had sheltered.

The storm caused power outages, destruction of shops and the eradication of palm trees.

As the storm hit the land, its severity declined, and contrary to the initial daunting predictions, the city of New Orleans was sheltered from its worst part, known as the "storm's eye".

In spite of falling from the storm, winds quickly hit 105 km / h in Mississippi.

Katrina was the sixth storm in Florida in a year.

The estimated loss of Katrina was estimated at 26 billion. It is estimated that the winds of the storm hit $ 26 billion in insured property. One of the experts estimated at least $ 9 billion worth of damage.

When she entered the United States, Katrina speeded up more than 200 km / h, and although its intensity was somewhat diminished, it destroyed vast areas. The damages in Louisiana and Mississippi were severe to the disaster.

Andrew's Thunderbolt, which flooded the Florida coast in 1992, was the most costly storm in the history of the country, costing more than $ 20 billion. The four floods in Florida last year, called Charlie, Franz, Ivan and Jin, cost a total of $ 23 billion in losses.

German company Munich Re, one of the world's largest insurance companies, estimates Hurricane Katrina's losses to insured property at $ 15-20 billion. The company is likely to suffer half a billion dollars.

Air Worldwide in Boston said insurance companies paid off between $ 12 billion and $ 26 billion in losses.

Risk Management Solutions in California also estimated that between $ 10 billion and $ 25 billion.

Of course, the estimated losses would not include damaged oil spills in the hurricane. The year before, it was storm-driven. Several oil platforms were abandoned, and Katrina moved from the west to Ivan's passage, resulting in an area where most of the oil facilities were located.

Hurricane Irma

The Hurricane Irma is one of the most striking hurricanes in the world. This terrible phenomenon has been in the fifth category of the Safeer-Simpson Scale for more than two days, indicating that one of the most powerful recent storms has been encountered.

The Irma's permanent wind speed reaches 175 mph (280 km / h). The Irma is like a whirlwind, Geoff Weber, a meteorologist at the National Center for Atmospheric Research, says that the area is more than 100 kilometers wide.

Why was Irma so big, intense and scary?

The power of a storm depends on three main factors: water temperature, wind shear and atmospheric humidity. Hot water and high humidity of the atmosphere increase the energy and strengthen the system, and cutting it down (ie increasing the cutting at higher altitudes) will also prevent the turf from dispersing.
All of these conditions were ideal for Irma.

In 1926, a huge storm destroyed Miami and killed 375 people. If such a storm occurs today, it will cost more than $ 200 billion. It's interesting to know that Hurricane Andrew, the largest storm of American history in 1992, caused more than $ 26.5 billion in damage.

Miami's Great Storm in 1926

However, climate change, increasing population density in beautiful, but high-risk coastal areas, and changes made by humans during natural disasters, all make the storms more dangerous and more disastrous.

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References:

• https://en.wikipedia.org/wiki/Hurricane_Irma
• https://www.nasa.gov/feature/goddard/2017/irma-atlantic-ocean
• https://en.wikipedia.org/wiki/Tropical_cyclone
• https://www.accuweather.com/en/hurricane
• https://weather.com/storms/hurricane-central
• https://en.wikipedia.org/wiki/Hurricane_Katrina
• https://history.com/topics/hurricane-katrina
• Images from Google

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