Lower Thermosphere Coupling Study

大气处于持续运动的状态，为了理解和预测它的运动，我们需要能够测量其中的风、波和潮汐。我们需要能够将结果与模拟大气动力学的大型计算机的数值模型进行比较。80-150公里的高度区域是最难观测的区域之一，对气球来说太高了，对航天器来说又太低了。正在将新的雷达和光学技术投入该领域，以获取数据，以便与该区域的全球模式及其与低层和高层区域的动力耦合进行比较。这些努力的重点是在为期3天或更多的5-6天的世界运动中对风和温度的雷达和光学测量进行解释，特别是针对80- 150公里高度的地区。一个研究领域涉及大气潮汐从低层到高层传播的数值模拟，以及对观测到的中间层、低层热层和高层热层的风和温度振荡的解释。电离层/热层相互作用影响低层和高层热层之间耦合的方式也将被研究。首席研究员在组织这一活动中发挥主导作用，并将协调结果的汇总，以便与模型进行比较。

The atmosphere is in a state of continual motion, and to understand and to be able to predict its motions we need to be able to make measurements of the winds, waves, and tides in it. We need to be able to compare the results with numerical models from large computers that simulate atmospheric dynamics. The height region 80-150km altitude is one of the hardest to observe, being too high for balloons and too low for spacecraft. New radar and optical techniques are being put into the field to obtain data for comparison with global models of the region and its dynamical coupling with the lower and higher regions. The focus for these efforts is the interpretation of radar and optical measurements of winds and temperatures during three or more 5-6 day world campaigns specifically devoted to the 80- 150km height region. One area of study involves the numerical simulation of atmospheric tidal propagation from lower to upper levels, and interpretation of observed wind and temperature oscillations in the mesosphere, lower thermosphere, and upper thermosphere. The way in which ionosphere/thermosphere interactions affect the coupling between the low and upper thermosphere will also be investigated. The Principal Investigator is playing a leading role in the organization of this campaign, and will coordinate the assembly of results for comparison with models.