Things you may not know about the storm

The storms outside the ocean are often extremely aggressive, but when they land, they quickly weaken and dissipate. What happened to them?

How were the storms born?

Storms often occur on the ocean from the 5th to 20th parallel of each hemisphere, forming in tropical oceans where warm water is due to this natural phenomenon requiring a minimum of 26 degrees of hot water and thickness from water surface to at least 50 m under water.

Hot water creates a strong evaporation, rising high to form condensed clouds containing thunderstorms. In the upper layer of the convection layer, this moist air radiates and begins to rotate in the inertial form of the Earth's rotation. The speed of rotation will gradually increase, the steam-filled clouds will grow, they need to speed up due to the dispersion when meeting the stratosphere at a height of 16km. A whirlwind began to form.

Hurricane Katrina in 2005. Photo: gisuser.com.

When the wind speed reaches 119 km / h, the cyclone actually becomes a storm with an extremely low pressure gas zone formed in the center of the vortex, called a storm eye, which absorbs all the moist air up there. , adding water vapor and forming clouds that are getting bigger and rain constantly.

The warmer the sea surface is, the more water evaporated, the more moist air is added to the vortex and therefore the wind accelerates. So it can be said that the amount of evaporation is the energy of the storms. This energy sometimes reaches the equivalent of 5 nuclear bombs per second.

When a storm encounters a colder stream or hits the mainland, it will decrease in intensity because of the lack of evaporation. So storms when going inland often weaken and disappear.

10 things you may not know about storms

1. In English, the storm is called a "hurricane", which is seen as a reading of the name of the fierce god of the South American "Hurracana". In the East, the ancient Chinese referred to the storm as the "Great Room" (high winds), which later Western scientists used the word "typhoon" to refer to today's Pacific storms. Storm in the Indian Ocean and on the Bay of Bengal is called "cyclone", called "willy willy" in Australia.

Storm name maps in different regions of the world.

2. In the past, when the storm had no name or was called arbitrarily, it was sometimes called after the name of the god of the storm. For example, the storm hit Puerto-Rico on July 26, 1825, known as the "Santa Anna" storm because it was Anna's Christian day.

3. Australian meteorologist Clement Ragg has come up with a unique naming method: giving storms of names of MPs who do not vote by granting credit to support hydro-meteorological research.

4. During World War II, meteorologists in the Air Force and the US Navy studied storms in the Pacific Northwest and to avoid confusion, they used their wife and girlfriend names. to set for the storm. After the war, the US meteorological agency followed up and compiled a list of storm names, including many easy-to-read, easy to remember, simple and easy to write names for women.

5. The rule of naming a storm depends on the time of the storm. The first storm of the year is named starting with the letter A (the first letter of the alphabet) and in that order until the last storm of the year.

6. There are several areas where there are often big storms, so there are several lists of different names. There are 6 lists for Atlantic storms, each with 21 names, used gradually over 6 years, then repeated. In the Pacific region, people use a list of 84 names.

7. In the event that the storm is too big or has very serious consequences, people will use the name of the storm separately for it and mark it from the list, instead of another name. Katrina is a good example.

8. Northeast Asians have a way of naming storms by animal names, flowers, plants and even food, such as Nakri, Yufoong, Kanmuri, Copu .

9. In Japan, people never call a storm by a woman's name because in the Land of the Rising Sun, women are considered very peaceful, cute and warm. In India, people do not name storms, merely called "storms".

10. The worst storm the world has suffered since the beginning of the twentieth century is now considered a Bhola Cyclone storm, hitting the Bhola of East Pakistan (present-day Bangladesh) on November 13, 1970. This devastating storm has claimed the lives of 500,000 people, left 100,000 people missing, wiped out many villages and houses, leaving tens of thousands of families into misery, hundreds of thousands of people losing loved ones and become homeless, helpless. Bhola was recorded as a destructive storm that caused the most severe consequences in modern history of mankind.