CEDAR: Studies of Large-and Small-Scale Dynamics in the Mesosphere and Lower Thermosphere Radar Using the Hawaii MF Radar

ATM 9813774调查人员将继续在夏威夷考艾岛使用中频(MF)雷达测量中间层风。这些数据将用于研究赤道和副热带地区海浪和平均风的年际、季节和短期变化。中频雷达技术非常适合于平均、潮汐和行星波结构的连续测量，但它在重力波调制、季节和短期变率、震源灵敏度和中层高度传播特征的统计和机制研究中也被证明是有价值的。具体的科学目标包括1)定义纬向平均环流，2)更完整地定义潮汐的结构和可变性，3)更好地了解行星波的结构，以及4)研究重力波的传播、震源响应和过滤。这项工作需要对夏威夷雷达进行升级，包括一个新的12位接收器系统和改进的分析软件。当与圣诞岛、拉罗通加和其他纬度的其他相对升级的系统相结合时，这些数据将大大有助于理解中间层和低热层动力学及其对全球大气结构的影响

ATM 9813774The investigators will continue measurements of mesospheric winds using a medium frequency (MF) radar on Kauai, Hawaii. The data will be used to study the interannual, seasonal, and short-term variability of the waves and mean winds at equatorial and subtropical latitudes. The MF radar technique is ideally suited for continuous measurements of the mean, tidal, and planetary wave structures, but it has also proven valuable in statistical and mechanistic studies of gravity wave modulation, seasonal and short-term variability, source sensitivity, and propagation character at mesospheric altitudes. Specific science objectives include 1) definition of the zonal mean circulation, 2) a more complete definition of the structure and variability of tides, 3) a better understanding of planetary wave structures, and 4) studies of gravity wave propagation, source responses, and filtering. The effort requires an upgrade to the Hawaii radar consisting of a new 12-bit receiver system and improved analysis software. When combined with other comparably upgraded systems at Christmas Island, Rarotonga, and other latitudes, the data will contribute significantly to understanding of mesosphere and lower thermosphere dynamics and its implications for global atmospheric structure