The Relative Importance of Stratiform and Convective Rainfall in Rapidly Intensifying Tropical Cyclones
The Relative Importance of Stratiform and Convective Rainfall in Rapidly Intensifying Tropical Cyclones
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DOI：
10.1175/mwr-d-16-0316.1
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发表时间：
2017-02
影响因子：
3.2
通讯作者：
C. Tao;Haiyan Jiang;J. Zawislak
中科院分区：
文献类型：
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作者：
C. Tao;Haiyan Jiang;J. Zawislak
利用16年的热带降水测量使命（TRMM）降水雷达（PR）观测资料，研究了热带气旋（TC）内核区域的降水特征以及层状降水和对流降水在快速增强（RI）事件演变中的相对重要性。RI的发病如下层状降雨的发生和方位角覆盖在所有剪切相对象限，特别是上切变左显着增加。通过比较两组缓慢增强的（SI）风暴，一组经历RI，另一组没有，进一步证实了RI风暴中层状发生增加的重要性。从统计上看，SI风暴在其生命周期中不经历RI，在内核内发生层状雨的百分比要低得多。在RI情况下，层状雨的相对较大的面积覆盖似乎与内核的增湿/增湿有关，特别是在对流层中。
AbstractUsing 16-yr Tropical Rainfall Measuring Mission (TRMM) Precipitation Radar (PR) observations, rainfall properties in the inner-core region of tropical cyclones (TCs) and the relative importance of stratiform and convective precipitation are examined with respect to the evolution of rapid intensification (RI) events. The onset of RI follows a significant increase in the occurrence and azimuthal coverage of stratiform rainfall in all shear-relative quadrants, especially upshear left. The importance of the increased stratiform occurrence in RI storms is further confirmed by the comparison of two groups of slowly intensifying (SI) storms with one group that underwent RI and the other that did not. Statistically, SI storms that do not undergo RI during their life cycle have a much lower percent occurrence of stratiform rain within the inner core. The relatively greater areal coverage of stratiform rain in RI cases appears to be related to the moistening/humidification of the inner core, particularly in...