CEDAR: Improved Continuing Lidar Observation and Geophysical Study of the Mesopause Region

研究人员继续用风/温度激光雷达观察中层顶区域的温度和钠密度。他们正在提高激光雷达在白天和风力方面的准确性和稳健性，在三年内有足够的数据来揭示数据的季节性变化。除了探索气候学和趋势外，这个长数据集还揭示了气候平均、潮汐和重力波、热通量、水平风和温度-钠密度相关的变异性信息。持续收集和分析的数据可以为激光雷达提供有趣的结果。例如，通过绘制7年来每个海拔高度的月平均气温，研究人员观察到3-4年的变暖趋势（1993年达到峰值），这被认为是皮纳图博撞击100公里高空大气的第一个证据。

The investigators continue their observations of temperature and sodium density in the mesopause region with a wind/temperature lidar. They are improving the lidar's accuracy and robustness with a daytime and wind capability, with enough data in three years to reveal seasonal variations of the data. In addition to exploring climatology and trends, this long data set reveals information on variability from climatological mean, tidal and gravity waves, heat flux, horizontal winds, and temperature-sodium density correlation. Continually collected, analyzed data can provide interesting results with the lidar. For instance, plotting monthly mean temperatures at each altitude over seven years, investigators observed a 3-4 year warming trend (peaking in 1993), believed to be the first evidence of Pinatubo impacting the atmosphere as high as 100 kilometers.