Lake Effect Boundary Layer Processes

湖泊效应边界层过程

基本信息

批准号：
9311946
负责人：
David Kristovich
金额：
$ 14.33万
依托单位：
University of Illinois at Urbana-Champaign
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
1993
资助国家：
美国
起止时间：
1993-06-01 至 1996-11-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9311946&HistoricalAwards=false
关键词：
Lake Effect Boundary Layer Processes

项目摘要

Lake-effect snows are produced by cold air flowing over warm lake surfaces and are known for their severity and disruption to life near the Great Lakes of the US and other locations around the globe. Convective boundary layers are the media through which cool air masses are coupled to the warm underlying Earth's surface. Convective boundary layers responsible for lake-effect snowstorms are particularly important because their accompanying clouds and snow act as tracers to reveal the structure and organization of the boundary layer when viewed by radar and instrumented aircraft. In addition, they are useful laboratories for study of the initiation and growth of snow. This project will analyze data from the Lake Snow Project and will be carried out as a collaborative effort between the University of Illinois and North Carolina State University. The Principal Investigator from the University of Illinois will use vertical profiles of moisture fluxes and analyses of Doppler radar winds and reflectivity to obtain a better description of small scale convective elements and their cloud and snow growth processes. The Principal Investigator from North Carolina State University will use aircraft data to identify conditions associated with the initial formation of ice particles in lake-effect clouds and to determine relationships between cloud and snow characteristics and ambient and/or antecedent meteorological conditions. Results from this research will be of value to boundary layer meteorologists concerned with convection and, cloud physicists interested in ice nucleation and snow growth, and weather forecasters striving to predict lake-effect snow storms.

湖泊效应的雪是由冷空气流过温暖的湖面，并以其严重性和对美国大湖区和全球其他地点附近生活的破坏而闻名。对流边界层是将凉爽的空气质量耦合到温暖的地面表面的介质。负责湖泊影响暴风雪的对流边界层尤其重要，因为当雷达和仪器飞机观察时，它们伴随的云和雪是示踪了边界层的结构和组织的示踪剂。此外，它们是研究雪的起始和生长的有用实验室。该项目将分析湖雪项目的数据，并将作为伊利诺伊大学和北卡罗来纳州立大学之间的合作努力进行。伊利诺伊大学的主要研究人员将使用水分通量的垂直轮廓和多普勒雷达风和反射率的分析，以更好地描述小规模对流元素及其云和雪生长过程。来自北卡罗来纳州立大学的主要研究人员将使用飞机数据来识别与湖泊效应云中初始形成冰颗粒相关的条件，并确定云与雪特征与环境和/或先例气象条件之间的关系。这项研究的结果将对与对流有关的边界层气象学家和对冰核和雪生长感兴趣的云物理学家以及努力预测湖泊影响暴风雪的天气预报者有价值。