Convection and the Atmospheric Boundary Layer

有组织的雷暴集合，被称为中尺度对流系统（MCSs），已被确定为春夏秋热带和中纬度地区大部分降雨的产生者。在美国国家科学基金会的支持下，首席研究员利用了以前进行的实地实验的数据集，以进一步了解mcs及其与大气边界层的相互作用。他将使用数值模型和观测案例研究来继续这些调查。首席研究员将专注于中尺度对流的启动、维持和调节过程，以及对流与大气边界层之间的耦合。具体目标包括：确定美国上空飑线的气候学和形成机制；1. 将以往MCSs演化及其地面气压特征的研究扩展到其他季节；继续研究中涡旋的特征。如果成功，这项研究将有助于更好地了解MCSs，从而更好地预测降雨的时间、地点和数量以及恶劣天气。＊＊＊

9618684 Johnson Organized collections of thunderstorms, known as mesoscale convective systems (MCSs), have been identified as producers of most of the rainfall in the tropics and mid-latitudes during the Spring, Summer and Fall. Under prior NSF support, the Principal Investigator has exploited data sets from previously held field experiments to further understanding of MCSs and their interactions with the atmospheric boundary layer. He will continue these investigations using both numerical models and observational case studies. The Principal Investigator will focus on processes which initiate, maintain and modulate mesoscale convection as well as the coupling between convection and the atmospheric boundary layer. Specific objectives include: Determine the climatology and initiation mechanisms for squall lines over the U.S.; 1. Extend previous research on the evolution of MCSs and their surface pressure features to other seasons; Continue studies of the characteristics of mesovortices. If successful, this research will lead to better understanding of MCSs which may lead to better predictions of timing, location and amount of rainfall as well as severe weather. ***