Simultaneous airglow, lidar, and radar measurements of mesospheric gravity waves over Japan
Simultaneous airglow, lidar, and radar measurements of mesospheric gravity waves over Japan
复制标题
DOI：
10.1029/2010jd014674
复制
发表时间：
2010-12
影响因子：
--
通讯作者：
Shin‐ichi Suzuki;Takuji Nakamura;M. Ejiri;M. Tsutsumi;K. Shiokawa;T. Kawahara
中科院分区：
文献类型：
--
作者：
Shin‐ichi Suzuki;Takuji Nakamura;M. Ejiri;M. Tsutsumi;K. Shiokawa;T. Kawahara
[1] 为了研究中间层和低热层（MLT）区域的重力波动力学，我们在航空学和动力学观测活动期间对日本上空的中间层重力波进行了协调观测。这次活动使用了两个全天空气辉成像仪来得出重力波的二维结构；这些成像仪安装在信乐市的中高层大气 (MU) 天文台（北纬 34.9°，东经 136.1°）和塔贺市的 Dynic Astropark 天文台（北纬 35.2°，东经 136.3°）。 MLT 地区水平风和温度的同步测量分别由信乐 MU 雷达的流星模式观测和宇治（北纬 34.9°，东经 135.8°）钠温激光雷达提供。 2008年10月2日，气辉重力波观测到水平波长为～170 km、波周期为～1 h、以～50 m s -1 向东北传播的重力波。在流星风和激光雷达温度数据的时间序列中观察到类似的波浪结构；根据重力波的线性理论，这些波的极性随着气辉强度的变化而变化。根据风和温度观测估计的重力波的相速度和动量通量也与通过气辉测量获得的结果非常一致。这些结果定性和定量地表明，在所有气辉强度、雷达风和激光雷达温度中都检测到了相同的重力波结构。
[1] To investigate gravity wave dynamics in the mesosphere and lower thermosphere (MLT) region, we conducted coordinated observations of mesospheric gravity waves over Japan during the Aeronomy and Dynamics Observation campaign. Two all-sky airglow imagers were used in this campaign to derive a two-dimensional structure of the gravity waves; these imagers were installed at the middle and upper atmosphere (MU) observatory in Shigaraki (34.9°N, 136.1°E) and at the Dynic Astropark Observatory in Taga (35.2°N, 136.3°E). Simultaneous measurements of the horizontal winds and the temperature in the MLT region were provided by the meteor-mode observations of the MU radar at Shigaraki and by a sodium temperature lidar at Uji (34.9°N, 135.8°E), respectively. On 2 October 2008, gravity waves having a horizontal wavelength of ∼170 km, wave period of ∼1 h, and propagating northeastward at ∼50 m s -1 were observed in the airglow keograms. Similar wave structures were observed in the time series of the meteor wind and lidar temperature data; the polarity of these waves varied consistently with the airglow intensity variations according to the linear theory of gravity waves. The phase speeds and momentum fluxes of the gravity waves, estimated from the wind and temperature observations, were also in good agreement with those obtained from the airglow measurements. These results demonstrate, both qualitatively and quantitatively, that an identical gravity wave structure was detected in all the airglow intensities, radar winds, and lidar temperature.