DEFINITION OF DUST DEVILS

Small tornado-like swirls or spinning vortices

that are commonly observed on hot days in desert areas.

Most have diameters of a few meters and rise less than 325

feet (100 m), but a few can rise many hundred meters and

contain damaging winds of 80 miles per hour (129 km/hr).

They are known (and feared) as jifn, or evil spirits in much of

Arabia, and as willy-willys in Australia. Dust devils form

when the Sun’s energy on clear, hot days heats the dry surface

so much that the air directly above the surface becomes

unstable, setting up low-level convection. Winds that blow

into the area to replace the rising air can be deflected around

topographic irregularities, causing the rising air to rotate and

form the dust devils. Dust devils are not as damaging or longlived

as tornadoes, and differ from them in that they form by

spinning air rising from the surface, whereas tornadoes form

by spinning air descending from a thunderstorm cloud.

Title Post:
Rating: 100% based on 99998 ratings. 99 user reviews.
Author:

Terimakasih sudah berkunjung di blog SELAPUTS, Jika ada kritik dan saran silahkan tinggalkan komentar