This generates ascent as well as negative vorticity source, which corresponds to a strongly anomaly anticyclone center appearing to the north of the heating region.
结果该区域产生了垂直上升运动及负的涡度强迫源，对应着异常强烈的反气旋环流。
The maximum rainfall is just below the positive vorticity center and at the west of the negative vorticity center.
特大暴雨出现在中低层辐合、高层辐散的正涡度中心下方和负涡度中心西侧；
Results show that the existing of a negative non-thermal wind vorticity center near the TC center is favorable to its offshore rapid intensification.
结果表明： 热带气旋中心附近存在非热成风涡度负值中心， 有利于近海热带气旋突然增强；
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