Lake Effect Snow Storms

冷空气团穿过相对温暖的湖水是大湖区冬季天气的许多重要特征。此外，当地的暴风雪，被称为湖效应风暴，在下风海岸附近形成，并用大雪淹没湖岸社区。这些风暴的结构以及五大湖对大型天气系统的影响是一个重要的科学和实践课题。1983-84年冬天，在国家科学基金会的赞助下，在密歇根湖附近举行了一个实地项目。来自飞机、地面站、卫星、高空探测和雷达的数据成功地收集了许多组织良好的湖雪事件。首席研究员将继续分析这一丰富的数据集。两个主要目标是建立造成当地大雪的低层大气流动结构的三维模型，并提供在这些风暴中处理的云和雪的细节的定量模型。//

Cold air masses crossing relatively warm lake waters account for many important features of winter weather in the Great Lakes Region. In addition, local snow storms, called lake-effect storms, form in the vicinity of the downwind shores and inundate lake shore communities with heavy snow. The structure of these storms as well as the effects the Great Lakes have on large weather systems is an important topic both scientifically and practically. Under National Science Foundation sponsorship a field program was held near Lake Michigan during the winter of 1983-84. Data from aircraft, surface stations, satellites, upper-air soundings and radar were successfully collected on a number of well- organized lake-snow events. The Principal Investigator will continue analysis of this rich data set. Two primary goals are to develop a three-dimensional model of the low level flow atmospheric flow structure that is responsible for the locally heavy snows and to provide a quantitative model of the details of the cloud and snow processed within these storms. //