单词	mesocyclone
释义	mesocyclone /ˌmezəˈsīklōn/ /ˌmesə-/ /ˌmēzə-/ /ˌmēsə- / noun Meteorology A cyclonic air mass associated with a supercell; its presence is a condition for a tornado warning.The frequency shift is then converted to wind velocity, yielding a small region of rapidly changing wind direction, a characteristic rotational wind shear signature of the mesocyclone indicating a tornadic circulation.... Various different temperatures and wind interactions at different altitudes can cause a rotating updraft called a mesocyclone. One of the major differences of super cells compared to that of single-cell and multi-cells storms is that, the super cell contains a viscous rotating updraft, this rotational updraft is known as a mesocyclone. Origin Late 20th century.
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