However, the wind field often exhibits additional spatial and temporal variability due to the effects of localized processes, such as thunderstorm activity and horizontal flow instabilities.Tags: Name For Event Planning BusinessHomework Reward ChartMovie EssayThe Human Family Tree EssayOf Thesis StatementDissertations Using Secondary ResearchHow To Write Up A Research Proposal
This radius is typically coincident with the inner radius of the eyewall, and has the strongest near-surface winds of the storm; consequently, it is known as the radius of maximum winds.
The previously mentioned processes result in a nearly axisymmetric wind field: Wind speeds are low at the center, increase rapidly moving outwards to the radius of maximum winds, and then decay more gradually with radius to large radii.
These forms are therefore typically strongest when over or near water, and weaken quite rapidly over land.
Coastal damage may be caused by strong winds and rain, high waves (due to winds), storm surges (due to wind and severe pressure changes), and the potential of spawning tornadoes.
At the center of a mature tropical cyclone, air sinks rather than rises.
For a sufficiently strong storm, air may sink over a layer deep enough to suppress cloud formation, thereby creating a clear "eye".A tropical cyclone is a rapidly rotating storm system characterized by a low-pressure center, a closed low-level atmospheric circulation, strong winds, and a spiral arrangement of thunderstorms that produce heavy rain or squalls.Depending on its location and strength, a tropical cyclone is referred to by different names, including hurricane ( A hurricane is a tropical cyclone that occurs in the Atlantic Ocean and northeastern Pacific Ocean, and a typhoon occurs in the northwestern Pacific Ocean; in the south Pacific or Indian Ocean, comparable storms are referred to simply as "tropical cyclones" or "severe cyclonic storms".Weather in the eye is normally calm and free of clouds, although the sea may be extremely violent.The cloudy outer edge of the eye is called the "eyewall".The heaviest wind damage occurs where a tropical cyclone's eyewall passes over land.In a weaker storm, the eye may be obscured by the central dense overcast, which is the upper-level cirrus shield that is associated with a concentrated area of strong thunderstorm activity near the center of a tropical cyclone.Coastal regions are particularly vulnerable to the impact of a tropical cyclone, compared to inland regions.The primary energy source for these storms is warm ocean waters.The near-surface wind field of a tropical cyclone is characterized by air rotating rapidly around a center of circulation while also flowing radially inwards.At the outer edge of the storm, air may be nearly calm; however, due to the Earth's rotation, the air has non-zero absolute angular momentum.