CEDAR: A Study of the Small-Scale Structure of PMSE Over Sweden Using Coherent Radar Imaging

研究者将研究极地中间层夏季回波（PMSE）的反射率结构及其与风场的关系。PMSE被认为是全球气候变化的可能前兆，因为它们可能与人为改变大气有关。这项研究将通过内布拉斯加大学和瑞典空间物理研究所大气研究计划之间的合作进行，该研究所在瑞典基律纳操作着一个中间层-平流层-对流层雷达。雷达的6个独立接收通道允许实现相干成像技术，以创建大气反射率结构的几乎即时图像。PMSE结构图像将与使用间隔天线技术获得的三维风场测量结果进行比较和对比。由于上升空气的膨胀冷却效应，风场的垂直分量被认为在PMSE的产生中是重要的。

Palmer, RobertATM9908616absThe investigators will study the reflectivity structure of polar mesosphere summer echoes (PMSE) and its relation to the wind field. PMSE have been put forth as a possible precursor of global climate change due to their possible connection to anthropogenic modification of the atmosphere. The study will be conducted through a collaboration between the U. of Nebraska and the Atmospheric Research Programme of the Swedish Institute of Space Physics, which operates a mesosphere-stratosphere-troposphere radar in Kiruna Sweden. The radar's six independent receiving channels allow the implementation of coherent imaging techniques to create almost instantaneous pictures of the reflectivity structure of the atmosphere. The images of PMSE structure will be compared and contrasted to the three-dimensional wind field measurements obtained using spaced antenna techniques. The vertical component of the wind field is believed to be important in the creation of PMSE due to the expansional cooling effects of rising air.