google-site-verification=cWndXyaTEZcYjY4FEyyTfPaDNZXT6dEW31FwW6Upp9A RECENT DISASTER: Cyclone:A natural disaster-

06 July 2020

Cyclone:A natural disaster-

CYCLONES
A cyclone is a natural disaster. In meteorology, a cyclone is a closed circle whose fluid keeps circling in the same direction as the Earth.
It usually rotates counterclockwise in the Earth's northern hemisphere and counterclockwise in the southern hemisphere.
The path of a cyclone flows in polar or tropical regions in a cycle of 2 to 6 days.
They form circulation centers in the west and usually move from west to east. Warm winds remain east of the cyclone center and appear mostly as stratiform.
It keeps moving towards the pole in the cyclonic path.  Closed centers enter the cyclonic life cycle late and wrap up the storm center.
Large cyclonic circulations are almost always centered on regions of low atmospheric pressure.  The largest low-pressure systems are called core polar cyclones and extra-tropical cyclones that live on a cyanoptic scale.

Classification:-
There are six main types of cyclones: -
  •  Polar cyclones,
  •  Low polar cyclone,
  •  Additional tropical cyclones,
  •  Intertropical cyclones,
  • Tropical cyclones and
  •  Mesocyclonase.

01. Polar cyclones:-
The polar, subipolar, or Arctic cyclone (also called the polar vortex) is a low pressure wide area, which is strong in winter and weak in summer.

 A polar cyclone is a low-pressure weather system that propagates from about 1,000 kilometers to 2,000 kilometers, with the wind moving in the northward direction in the northern hemisphere and a clockwise direction in the southern hemisphere.

 In the northern hemisphere, the polar cyclone has an average of two centers.  One center lies in the island of Baffin and the other near northeast Siberia.

 In the southern hemisphere, it becomes located on the edge of the Ross Ice Shelf near 150 west longitude.
 
 When the polar vortex is powerful, its flow increases towards the Earth's surface.  When polar cyclones are weak, significant cold outbreaks begin to increase.


02.Low polar cyclones:-
Low p cyclone is a small-scale, short-lived, low-pressure system found on ocean areas in front of the main polar front of both the northern and southern hemispheres.

This system is usually less visible on the parallel scale and cannot survive more than one to two days.

 They are part of a larger class of mesoscale weather systems.

 Polar lows are harder to detect than traditional weather reports and are a threat to high latitude processes, such as shipping, gas, and oil platforms.

 Low polar is also referred to by other terms, such as polar mesoscale vortex, arctic storm, arctic low and cold air pressure.
 The term is generally reserved for more vigorous systems with near-surface winds of at least 15 m.


03. Additional tropical cyclones:-
The terms 'extra-tropical' refer to the fact that such cyclones occur outside the planet's tropics, between the middle latitudes.  
These systems are reported as 'mid-latitude cyclones' due to their regional formation or post-tropical cyclones, where extra-tropical transition occurs and is often 'low' or 'low' by earlier weather forecasters and the general public.  Pressure 'is described.  
These are everyday events that, along with opposing cyclones, make up the majority of the Earth's climate.

 The extratropical tropical cyclone is a brief-scale low-pressure weather system that has neither tropical nor polar characteristics, associated with a forward and parallel gradient in temperature and snow point, thus called a "baroclinic zone".  .

However, extra-tropical cyclones are almost always called baroclinic, because they are in keeping with the western air temperature and snowflake regions, and sometimes they become barotropic when the temperature distribution near the cyclone is uniform with radius is an extra-tropical cyclone converts into a subclassic storm and from there into an inter-tropical cyclone.
if it remains above warm water and develops its original heat into central convection.

04. Intertropical cyclones:-
Intertidal cyclone is a weather system with some characteristics similar to tropical cyclones and some additional tropical cyclones.

These may form between the equator and the 55th parallel.

Since the 1960s, astronomers did not understand whether to call it a tropical cyclone or a more tropical cyclone.

That is why they were called tropical tropics and semi-tropics which were also called hybrid cyclones.

 In 1972, the National Hurricane Center officially recognized this cyclone.
 
From 2002 onwards, tropical tropical cyclones began to receive names from the Atlantic Basin from the official tropical cyclone list.

They have broad air patterns, which can hold the maximum wind that is located farther away from the center than tropical cyclones, and are found to range from weak to mid-level temperatures.

Because they are formed by more tropical cyclones whose temperatures are cooler than other cuttings, the ocean surface temperature used for their formation is lower than the tropical cyclone threshold of 03 ° C, or 05 ° F,  Is around 23.5 ° C.

This suggests that intertropical cyclones form outside the conventional boundary in stormy weather.

Although inter-tropical storms rarely have the pressure of stormy winds, they can be tropical in nature if they are heated.

05. Tropical cyclones:-
A tropical cyclone is a storm system that produces a low pressure center, thunderstorms, strong winds and excess rainfall.

A tropical cyclone is formed when heat is released from moist air, resulting in the release of vapor contained in moist air.  These are formed by separate heat components and are called other cyclonic storms, such as nor'easters, European windstorms, polar less, storm systems.

 The term 'tropical' refers to both geologic forms, which are found exclusively in the tropical regions of the globe, and sea breeze is formed in tropical air clusters.

 The term 'cyclone' refers to a cyclonic cyclone by nature, which rotates in the northern hemisphere, in the Uttaravarat and in the southern hemisphere.

  Tropical cyclones are also known by other names, depending on location and power, such as hurricanes, hurricanes, tropical storms, cyclonic storms, tropical pressures, or cyclones only.} Generally, a tropical cyclone is called a hurricane in the Atlantic Basin and Pacific Ocean (  Named after an ancient Central American god of wind, Huracan).
However, tropical cyclones can produce extremely powerful winds and torrential rains.  They are also capable of producing high waves and destructive storms.

  They grow on large bodies of hot water.And their strength is reduced due to moving on the ground.

 For this reason, tropical storms can cause considerable damage to coastal areas, while inland areas are relatively safe from them.

  Heavy rains, however, create flooding conditions in inland areas and storm waves create widespread coastal flooding conditions over the coastline.

Although their effects on human populations can be devastating, tropical cyclones can provide relief from drought conditions.

They carry heat and energy from the tropics to temperate latitudes, making them an important part of the global atmospheric circulation system.

As a result, tropical cyclones help to maintain equilibrium in the Earth's atmosphere, keeping temperatures around the world relatively stable and warm.

 Many tropical cyclones develop when the atmosphere conditions are favorable, with a weak upheaval in the atmosphere.

Others form when other types of cyclones acquire tropical characteristics.

Tropical systems then drift into the gorge with blowing winds.
 
If the situation is favorable, the tropics become turbulent and then a center develops there.

At the other end of the spectrum, if conditions around the system deteriorate or tropical cyclones make landfall, the system weakens and eventually collapses.
 
A tropical cyclone becomes an extra-tropical cyclone when it moves towards higher latitudes if its energy is released by the original condensation that changes from the heat to the atmosphere between the air states.
 From a functional point of view, a tropical cyclone does not become intertropical during its additional transition.

06. Mesocyclone:-
Mesocyclone is a vortex of air, which is contained in a diameter of about 03 km to 10 km closed storm.

The wind arises and rotates in the same vertical axis, same direction as in a low pressure system in any hemisphere.

 They are often stormy, meaning they are associated with a localized low pressure area.
 Such storms cause severe winds and hail on the surface.
 Mensocyclones are often found together with infestations in the upper cell, where they can become blind. 

About 1500 mesocyclones form in the United States each year, but only half of them form severe storms.

Structures of cyclones:-
All cyclones have some common structural characteristics.  For example, in areas of low pressure, their center is located in the region of the lowest atmospheric pressure and is known as the core of a mature tropical cyclone.
Near the center, the shear force pressure (at the cyclone's external pressure compared to the cyclone's center pressure) and the Coriolis force must be in a balanced ratio, otherwise a change in pressure can cause the cyclone to collapse.

  The Coriolis effect causes the airflow around a large cyclone to rotate in the counterclockwise direction in the northern hemisphere and counterclockwise in the southern hemisphere.  



Heavy winds blowing,Cyclone, typhoon, hurricane. All of these names are usedaround the world to describe the most powerful storm known to man.
 Hurricanes areunpredictable but scientists have a through understandingof how hurricanes form and sustain their power. In the Atlantic Ocean,hurricane season peaks during the late summer months whentropical waters are the warmest. Hurricanes form from acluster of thunderstorms that suck up the warm,moist air and move it high into Earth's atmosphere. The warm air is then converted into energy that powers thehurricane's circular winds. These winds spin arounda low-pressure center called the eye. Which can provide a 20 to 30mile radius of eerie calm. Encircling it is the eye wall,a towering ring of clouds with some of the fastestwind-speeds of the hurricane. 

Surrounding the eye wallare curved bands of clouds. The rainbands, often tens of miles wide releasing sheets of rainand sometimes tornadoes. When a tropical storm'swinds reach at least 74 miles per hour, it becomes a hurricane. The hurricane then receivesthe category ranking of one to five on the Saffir-Simpson Scale based on its wind speedand potential damage. But wind speed isn't alwaysthe most dangerous component when hurricanes come near land. It's storm surge. Storm surge is caused whenwinds from an approaching hurricane push water towards the shoreline up to 20 feet above sea leveland can extend 100 miles. 90% of all hurricane deathsare the result of storm surge. While hurricanes cancause mass devastation, just like other natural disasters, they serve a higher purposewithin the global ecosystem. 

Hurricanes help regulate ourclimate by moving heat energy from the equator to the poles keeping the Earth's temperature stable. Over time, science has helpedus to better understand hurricanes and predict their paths. Saving lives through early warning systems and helping us build better infrastructure to protect our cities. The more we study these complex storms, the better we can prepare for them and minimize their impact on human lives. 






1 comment:

  1. Amphan tuphan per bhi kuch likha digiye...

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