Mesosphere and Lower Thermosphere at Arecibo

pi将继续对中间层和低层热层航空学进行全面研究。该项目将利用阿雷西博天文台的非相干散射雷达（ISR）数据和光学设备，阿雷西博天文台的钠/铁共振激光雷达，以及宾夕法尼亚州立大学进行的建模/理论研究的数据分析。续期拨款将包括：(1)继续进行ISR/lidar观测和模型研究，研究小规模中性大气结构、声重力波、潮汐和零星金属和离子层之间的关系（或“耦合”）；(2)温度依赖性化学；(3) 6小时潮汐的成因；(4) 100-250km区域新观测到的短周期波与离子层的复合体；(5) 90-100km区域（有时复杂）离子层结构的起源及其与零星金属层的关系；(6)在钠层和离子层以及“背景”电离层中观察到的明显“对流”过程

The PIs will continue comprehensive studies of mesosphere and lower thermosphere aeronomy. This program will utilize Incoherent Scatter Radar (ISR) data and optical facilities of Arecibo Observatory, a sodium/iron resonance lidar at Arecibo on a campaign basis, and data analysis coupled with modeling/theoretical studies conducted at Penn State. The renewal grant will cover: (1) continued ISR/lidar observational and modeling investigations of the relationship (or "coupling") between small-scale neutral atmosphere structure, acoustic-gravity waves, tides and the presence of sporadic metal and ion layers; (2) temperature dependent chemistry; (3) the origin of the 6-hour tide; (4) the complex of newly observed short-period waves and ion layers in the 100-250km region; (5) the origin of the (sometimes complex) ion layer structures in the 90-100km region and their relationship to sporadic metal layers; and (6) apparent "convective" processes as observed in the sodium and ion layers as well as in the "background" ionosphere.***