苏爱芳,郑永光,张宁,王迪,俞小鼎. 2022. 边界层辐合线触发深厚湿对流研究进展. 气象学报,80(2):177-189. DOI: 10.11676/qxxb2022.013
引用本文: 苏爱芳,郑永光,张宁,王迪,俞小鼎. 2022. 边界层辐合线触发深厚湿对流研究进展. 气象学报,80(2):177-189. DOI: 10.11676/qxxb2022.013
Su Aifang, Zheng Yongguang, Zhang Ning, Wang Di, Yu Xiaoding. 2022. A review of research on boundary convergence lines triggering of deep and moist convection. Acta Meteorologica Sinica, 80(2):177-189. DOI: 10.11676/qxxb2022.013
Citation: Su Aifang, Zheng Yongguang, Zhang Ning, Wang Di, Yu Xiaoding. 2022. A review of research on boundary convergence lines triggering of deep and moist convection. Acta Meteorologica Sinica, 80(2):177-189. DOI: 10.11676/qxxb2022.013

边界层辐合线触发深厚湿对流研究进展

A review of research on boundary convergence lines triggering of deep and moist convection

  • 摘要: 边界层辐合线(BLCL)是指存在于边界层内的线状气流汇合带,被认为是深厚湿对流的主要触发系统,有多种类型,其触发对流作用非常复杂。文中就BLCL(不包括冷锋)触发对流事件的统计研究、其导致的局地温湿扰动对触发对流的影响、BLCL对流触发机制等方面的中外研究进行了系统回顾总结。已有研究结果表明,不同天气系统背景、不同地区BLCL的类型、表现形式不同,其触发深厚湿对流的概率、与对流风暴的位置、时间的相关也有所不同。BLCL能否触发对流还与大气环境条件、BLCL与其他动力学过程相互作用有关。在一定的对流环境条件下,局地温湿扰动不仅对BLCL的强度产生影响,而且还可以通过影响BLCL附近大气层结状态的分布影响到对流能否被触发。BLCL与环境动力和热力相互作用产生的局地变化使对流触发机制变得更加复杂。建议未来基于精细的观测资料和数值模拟试验针对不同区域、不同类型的BLCL的对流触发特征和机制开展系统研究。

     

    Abstract: Boundary layer convergence lines (BLCLs), an important type of weather system that can trigger deep moist convection, correspond to quasi-linearly extending airflow confluence zones in the boundary layer. Multiple types of BLCLs exist, and mechanisms for their triggering of convection are complicated. This paper summarizes the existing studies on the climatological statistics of BLCLs (excluding cold fronts) and mechanisms for their triggering of convection, and the effects of local temperature and moisture disturbances on the convection triggering. These studies have presented that the triggering probability, the storm location and time correlation are all affected by different synoptic systems and BLCL types in different regions. Under certain favorable conditions, local temperature and moisture can not only affect BLCL intensity, but also affect the distribution of atmospheric stratification near BLCLs, and thus convection initiation can occur. Moreover, the dynamical and thermal interactions between local temperature and moisture disturbances and the environment make the convection triggering mechanisms more complicated. The paper also discusses some convection triggering issues that need to be further studied. Based on fine observations and numerical simulation, it is also suggested to carry out more systematic studies on the characteristics and mechanisms of convection triggering for different regions and different types of BLCLs in the future.

     

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