WINDII on UARS : A View of Upper Mesosphere and Lower Thermosphere Dynamics
WINDII on UARS : A View of Upper Mesosphere and Lower Thermosphere Dynamics
复制标题
UARS 上的 WINDII：上层中间层和下层热层动力学的视图
DOI：
10.5636/jgg.48.125
复制
发表时间：
1996
期刊：
影响因子：
--
通讯作者：
G. Shepherd
中科院分区：
文献类型：
--
作者：
G. Shepherd
WINDII 是高层大气研究卫星 (UARS) 上的风成像干涉仪，自 1991 年 9 月以来一直在轨道上运行，到 1995 年已积累了超过 1400 万张高层大气图像。它采用多普勒成像技术，使用迈克尔逊干涉仪和 CCD 相机来获取风、温度和选定气辉发射的体积发射率，这些气辉发射在可见光和近红外范围内，覆盖高度范围为 80 至 300 公里。在本文中，我们首先介绍了由原子氧重组产生的 O( 1 S) 557.7 nm 夜间气辉发射的风和发射率测量。从这些数据中发现，大气潮汐对原子氧的分布具有深远的影响。还发现了风和排放率的强烈纵向调制，表明原子氧存在大规模的行星扰动。然后介绍了白天 557.7 nm 绿线发射的观测结果，该发射主要来自太阳 EUV 激发。从这些数据中，我们可以看到绿线发射对太阳通量的响应，以及行星尺度的扰动。白天，极地中层云的散射为该大气层区域的强烈动态提供了进一步的证据。
WINDII, the Wind Imaging Interferometer on the Upper Atmosphere Research Satellite (UARS), has been in orbit since September, 1991 and by 1995 had accumulated more than 14 million images of the upper atmosphere. It employs Doppler imaging using a Michelson interferometer and CCD camera to obtain winds, temperatures and volume emission rates of selected airglow emissions in the visible and near-IR covering the altitude range 80 to 300 km. In this paper we first present wind and emission rate measurements from the O( 1 S) 557.7 nm night airglow emission resulting from the recombination of atomic oxygen. From these data atmospheric tides have been found to have a profound influence on the distribution of atomic oxygen. A strong longitudinal modulation in winds and emission rate has been found as well, indicating large scale planetary disturbances in atomic oxygen. Observations of daytime 557.7 nm green line emission are then presented, which arise mainly from solar EUV excitation. From these data one can see the response of the green line emission to the solar flux, as well as planetary scale disturbances. During the daytime, scattering from polar mesospheric clouds provides further evidence for the strong dynamics of this region of the atmosphere.