Relationship Between Mesoscale Environment and Hawaiian Rain Band

[9301227]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。地形学不仅对局部天气有影响，而且对大尺度气流也有影响。夏威夷多山的孤岛为这些研究提供了一个天然的实验室。1990年，几位研究人员执行了一个合作项目，即夏威夷雨带项目，以研究该岛对当地天气和基本山地/大气流动相互作用的影响。首席研究员将继续并扩展他以前的研究，利用在HaRP期间收集的数据，研究雨带与中尺度环境之间的关系。利用先前观测研究的结果和广泛的数值模拟，他将研究雨带的日演变，这是夏威夷岛迎风面一贯的大气特征。首席研究员将专注于控制形成雨带的辐合带的位置和强度的更大规模的作用力。具体而言，研究人员将尝试验证先前关于雨带动态强迫的数值模型结果，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. ***