Effects of Island-induced Circulation on Localized Heavy Rainfall

小行星9730072 一段时间以来，人们已经知道，地形学在人类的生活中起着重要的作用。 产生强降雨。 地形诱发的山洪是一个世界性的问题. 1987年，美国与台湾合作进行了一项研究计划，旨在调查山区暴雨的动力学。 这个被称为台湾地区中尺度实验（TAMEX）的项目产生了大量的数据，这些数据被用来了解环境和地形引起的流动之间的相互作用及其对降水产生的影响。 在本研究中，主要研究者将继续分析TAMEX数据，并使用先进的中尺度数值模型进行建模研究。 具体目标包括：1）锋前西南季风气流作用下台湾西北海岸沿着障壁急流的结构和动力; 2）偏折气流和环境气流产生的中尺度辐合对西北海岸沿着局地暴雨发生的作用。 此外，利用已经建立的密集的地面和雨量计网络，首席研究员将研究岛上气流和降雨分布的日变化。 这项研究的成功完成将有助于更好地了解 关键动力结构的地形引起的山洪暴发，并可能导致更好的预测这种威胁生命的事件。 ***

9730072 Chen It has been known for some time that orography plays a substantial role in the production of heavy rainfall. Orographic induced flash floods are a problem world- wide. In 1987, the U.S. in conjunction with Taiwan executed a research project aimed at investigating the dynamics of heavy rainfall in mountainous terrain. This project, known as the Taiwan Area Mesoscale Experiment (TAMEX) produced a wealth of data which is being used to understand the interactions between environmental and orographic induced flows and their impact on precipitation production. In this study, the Principal Investigator will continue analysis of TAMEX data in conjunction with modeling studies using an advanced mesoscale numerical model. Specific objectives include to investigate 1) the structure and dynamics of the barrier jet along the northwestern coast of Taiwan under the pre-frontal southwesterly monsoon flow; 2) the role of mesoscale convergence generated by the deflected airflow and environmental flow on the occurrences of localized heavy rainfall along the northwestern coast. In addition, with the dense surface and rain gauge networks that are already in place, the Principal Investigator will study the diurnal evolution of island-scale airflow and rainfall distributions over the island. Successful completion of this research should lead to a better understanding of critical dynamical structures of orographic induced flash floods and may lead to better forecasts of such life-threatening events. ***