Relationship Between Mesoscale Environment and Hawaiian Rain Band

9301227陈大气流动与山脉的相互作用是大气科学中的一个重要问题。地形不仅对局地天气有影响，对大尺度气流也有影响。夏威夷多山的岛屿与世隔绝，为这些研究提供了一个天然的实验室。1990年，几位研究人员合作实施了夏威夷雨带计划(HARP)，以研究该岛对当地天气和基本山地/大气气流相互作用的影响。首席调查员将继续并扩展他之前利用在强降水过程中收集的数据对雨带和中尺度环境之间关系的研究。利用之前的观测研究和广泛的数值模拟结果，他将研究雨带的日演变，这是夏威夷岛迎风一侧一贯的大气特征。首席调查员将侧重于控制造成雨带的辐合带的位置和强度的更大范围的强迫。具体地说，研究人员将尝试验证之前与雨带动力强迫有关的数值模式结果，并将重新检查热强迫的作用。***

9301227 Chen The interactions of atmospheric flows with mountains is an important issue in atmospheric sciences. Orography plays a role in both local weather as well as influencing the larger scale flow. The isolation of the mountainous Island of Hawaii provides a natural laboratory for these studies. In 1990 a cooperative project among several researchers, the Hawaiian Rainband Project (HaRP), was executed to study the influence of the island on local weather and fundamental mountain/atmospheric flow interactions. The Principal Investigator will continue and extend his previous research on the relationship between rainbands and the mesoscale environment using data collected during the HaRP. Using results from prior observational studies and extensive numerical simulations, he will examine the diurnal evolution of the rainbands, which are a consistent atmospheric feature on the windward side of the island of Hawaii. The Principal Investigator will focus on the larger scale forcing that controls the location and strength of the convergence zone responsible for the rainbands. Specifically, the researcher will attempt to verify previous numerical model results pertaining to dynamic forcing of rainbands and will reexamine the role of thermal forcing. ***