Lake Effect Boundary Layer Processes

湖泊效应边界层过程

• 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

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.

湖效应雪是由冷空气流过温暖的 湖面，并以其严重性和破坏性而闻名， 生活在美国五大湖和其他地方周围的 地球仪。 对流边界层是冷却的介质， 气团与温暖的地球表面相耦合。 造成湖效应暴风雪的对流边界层 特别重要，因为它们伴随着云， 雪作为示踪剂，揭示了结构和组织， 雷达和装有仪表的飞机观察时的边界层。 在 此外，它们也是研究启动的有用实验室。 雪的生长。 该项目将分析湖雪项目的数据， 将作为一个合作的努力， 伊利诺伊大学和北卡罗来纳州州立大学。 的 伊利诺伊大学的首席研究员将使用 水汽通量的垂直廓线和多普勒雷达分析 风和反射率，以获得更好的描述小 尺度对流要素及其云和雪的生长 流程. 来自北卡罗来纳州的主要研究者 大学将使用飞机数据来确定相关条件 随着湖泊效应云中冰粒的初步形成 并确定云和雪之间的关系 特征和环境和/或先前气象 条件 本文的研究结果对边界层的研究具有一定的参考价值 研究对流的气象学家和云物理学家 对冰的成核和雪的生长以及天气 预报员努力预测湖泊效应的暴风雪。