It is a transfer station of the exchange of matter and energy. [9] When the sun heats up the earth surface, water vapor evaporates into the atmosphere and condenses into water droplets, a great amount of heat energy, which is locked up in the water vapor, is released.

Bay of Bengal and Arabian Sea from May to June and October to November. In the bay of Bengal, Arabian Sea and Western South Indian Ocean, the name is"cyclonic". What is the source of energy for all tropical cyclones? These water evaporated from the sea/ocean is carried up into the atmosphere and condenses, forming clouds from which all forms of precipitation result. The heat and moisture from this warm water is ultimately the source of energy for cyclones. [2][3] This scale was subsequently tweaked by the United States National Oceanic and Atmospheric Administration (NOAA) to include all tropical cyclones, with winds above 35 kn (65 km/h; 40 mph) who also renamed it the accumulated cyclone energy index. This swell travels a long way, it may be observed as far as 1000 miles away from the center of the storm, and this provides a warning. Although the rains contribute to the water needs of the areas traversed by the cyclones, the rains are harmful when the amount is so large as to cause flooding.

Accumulated Cyclone Energy is also used in the eastern and central Pacific Ocean. Although ACE is a value roughly proportional to the definite integral over time of the kinetic energy of the system, it is not a direct calculation of energy (the mass of the moved air and therefore the size of the storm would show up in a real energy calculation).

The following are the necessary requirements established for tropical cyclone formation: Sufficiently large ocean areas with a surface temperature of more than 26°C or 27°C that air lifted from the lowest atmospheric layers and expanded moist adiabatically remain considerably warmer than the surrounding undisturbed atmosphere at least up to a level of about 40,000 feet. Add your answer and earn points.

[10] These three categories are above-, near- and below-normal and are worked out using an approximate tercile partitioning of seasons based on the ACE index, number of tropical storms, hurricanes and major hurricanes over the 30 years between 1981 and 2010. The 1977 season has the lowest ACE. As the duration of a storm increases, more values are summed and the ACE also increases such that longer-duration storms may accumulate a larger ACE than more-powerful storms of lesser duration.

The four stages of the life history of a cyclone are: The incipient stage when the tropical cyclone form in waves and in shear lines of pre-existing disturbances and winds usually remain below the typhoon force.

The exact distribution and amplitude of the storm surge depend in a complicated way on the bottom topography as well as the size, intensity, direction and speed of movement of the tropical cyclone. The swell moves with a speed of three or four times greater than the speed of the storm center. Its impact is greatest over the coastal areas, which bear the brunt of the strong surface winds, squalls, induced tornadoes, and flooding from heavy rains, rather than strong winds, that cause the greatest loss in lives and destruction to property in coastal areas.

These development near landfall lead to unexpectedly large damage.

It is best described as the highest water level rise as the peak of the storm surges usually coincides with the time of passage of typhoon across a coastline. Though these heat sources are not sufficient to start a hurricane going, the heat of condensation supports the process once started.

During the passage, storm surge is generated. The intensity of tropical cyclones vary, thus , we can classify them based upon their degree of intensity. This mound of water follows the storm and contributes to the storm surge when the hurricane makes landfall.

Through this process, an average-sized typhoon will get an energy supply in one day equivalent to the energy release by 40,000 hydrogen bombs. Within the Eastern Pacific Ocean, the United States National Oceanic and Atmospheric Administration and others, use the ACE index of a season to classify the season into one of three categories. In other parts of the world, these are referred to as hurricanes, typhoons or simply tropical cyclones depending on the region.

This process is known as condensation.

The accumulated cyclone energy of a season is calculated by summing the squares of the estimated maximum sustained velocity of every tropical cyclone that has wind speeds of 35 kn (65 km/h; 40 mph) or higher, at six-hour intervals. The strong winds generate surface waves with amplitudes of 20 m or more. The frontal theory indicates that many tropical cyclones form along the front between the trade winds and the equatorial air in the doldrums .