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<br />0031 n <br /> <br />Embedded convection: convective cells rising within and usually above a layer cloud. Weak <br />embedded convection is visible, by the appearence of small cloud turrets, above many <br />orographic clouds. <br /> <br />FM: Federal Aviation Administration. <br /> <br />FONS!: finding of no significant impact. <br /> <br />FWCA: Fish and Wildlife Coordination Act. <br /> <br />Flux (SLW): the rate of flow ofSLW (e.g., over a mountain barrier). <br /> <br />GFE: government-fumished equipment. <br /> <br />GPS: global positioning system. <br /> <br />GS: Geological Survey. <br /> <br />I <br /> <br />~ <br /> <br />Glaciogenic cloud seeding: seeding designed to add ice particles to clouds, whether by chilling <br />the air below - 40 oC to accomplish homogeneous ice nucleation (without the involvement of ice <br />nuclei), or by addition of artificial ice nuclei to acheive hetrogenerous ice nucleation. <br /> <br />graupel: snow pellets formed by accretion (capture and freezing) of supercooled cloud droplets <br />on falling ice crystals. <br /> <br />HIPLEX-l: High Plains Cooperative Program Experiment. <br /> <br />IFR: instrument flight rules. <br /> <br />118: instrument landing system. <br /> <br />IPC: ice particle concentration. <br /> <br />Ice nuclei: tiny particles that serve to create ice crystals in the atmosphere; clay and other <br />natural materials mixed through the atmosphere often serve as ice nuclei, and some <br />manufacturing processes add ice nuclei. Silver iodide is the most common type of artificial ice <br />nuclei. <br /> <br />in situ: Latin. in its original place (e.g., within a cloud). <br /> <br />Lee subsidence: the downward motion and associated warming in the lee (downwind side) of an <br />orographic barrier that results in rapid evaporation of cloud droplets and sublimation of ice <br />particles. <br /> <br />Lidar: similar to radar, but using energy at or near visible light wavelenths. A lidar ceilometer <br />can monitor cloud base elevation. <br /> <br />m.s.!.: mean sea leveL <br /> <br />iv <br />