Laboratory and Field Studies of Ice Particles Related to Electrical and Radiation Properties of Clouds

模拟卷云和对流云中冰粒的实验室实验将研究电荷分裂和分离的条件。将构建一个系统来产生选定尺寸和形状的单分散冰晶，这些冰晶的光学特性将在一个专门设计和构建的光学系统中进行检查。结果将与通过飓风、佛罗里达近海的海上对流单体、北达科他州的对流馈电云飞行获得的现场数据以及在CAPE（1991）期间NOAA P3将获得的新数据进行比较。这将包括测量电场和微物理演化（冰粒、聚结滴和它们的电荷），因为对流云在佛罗里达陆地上演化。结果还将与辐射和其他飞机数据进行比较，这些数据是由高空飞行的飞机在卷云中获得的。本文将建立一个简单的对流云中热演化的数值模型，该模型适用于评估深层对流云系统的垂直热收支，包括冰和合并降水过程。

Laboratory experiments to simulate ice particles in cirrus and convective clouds will investigate conditions for break up and separation of electric charge. A system will be constructed to generate monodisperse ice crystals of selected size and shape whose optical properties will be examined in a specially designed and constructed optical system. Results will be compared with field data already obtained during flights through hurricanes, maritime convective cells off Florida, convective feeder clouds in North Dakota and new data to be obtained on the NOAA P3 during CAPE (1991). This will include measurements of electric field and microphysical evolution (ice particles, coalescence drops and their electric charge) as convective clouds evolve overland in Florida. Results will also be compared with radiation and other aircraft data obtained by higher flying aircraft in cirrus as it becomes available. A simple numerical model of heat evolution in convective clouds will be constructed applicable to assessing the vertical heat budget of deep convective cloud systems involving both ice and coalescence precipitation processes.