WeatherCâu 79 / 100
What best describes a microburst?
a.A slow, wide column of rising air that can lift an sUAS above 400 ft AGL
b.A gradual change of wind direction with altitude over several thousand feet
c.An intense localized downdraft causing severe wind shear for about 15 minutes
d.A steady sea breeze front that pushes inland during the warmest afternoon hours
Giải thích
A microburst is a small but extremely strong downdraft that slams into the ground and spreads outward, generating severe wind shear with horizontal winds that can exceed 100 knots, and an individual microburst typically lasts only about 15 minutes. That short life and small size make it hard to see coming, which is exactly why remote pilots avoid the area near any convective cell. It is a downdraft rather than an updraft, and it is far more violent and abrupt than a normal wind gradient or a sea breeze.
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