Simultaneous observation of gravity waves at PMC altitude from AIM/CIPS experiment and PANSY radar over Syowa (69°S, 39°E)
Simultaneous observation of gravity waves at PMC altitude from AIM/CIPS experiment and PANSY radar over Syowa (69°S, 39°E)
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通过 AIM/CIPS 实验和 PANSY 雷达在昭和 (69°S, 39°E) 上空同步观测 PMC 高度的重力波
DOI：
10.1016/j.jastp.2017.10.006
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Russell James M.
中科院分区：
文献类型：
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作者：
Thurairajah Brentha;Sato Kaoru;Yue Jia;Nakamura Takuji;Kohma Masashi;Bailey Scott M.;Russell James M.
利用地面雷达和卫星仪器同时观测了西奥瓦(69°S，39°E)极地夏季中间层重力波。2016年1月21日，协调世界时2.3时，AIM卫星上的CIPS仪器在Syowa上空观测到具有GW结构的极地中间层云(PMC)。波峰方向为西北向传播方向。周期图分析表明，GWS的水平波长分别为105m±35m和60m±35m。对同一时刻、同一位置和同一高度的Pansy雷达水平风分量的交叉谱分析表明，有两个优势波，视周期分别为15和9小时，水平波长分别为100°和302°±1130°Km。在PMC高度83公里处，观测到的∼垂直动量通量谱的平均纬向分量向西，经向分量向北。Pansy雷达和CIPS仪器观测到的15h波的水平波长具有可比性，Pansy的水平动量垂直通量方向与由互谱分析估计的传播方向与CIPS的波峰方向(即西北传播方向)之间的一致性表明，两台仪器都观测到了相同的波。CIPS和Pansy雷达对同一波的同时观测提供了南极夏季中间层中GW的水平和垂直范围的独特视角。
Simultaneous observation of gravity waves (GWs) in the polar summer mesosphere over Syowa (69°S, 39°E) by a ground-based radar and satellite instrument are presented. On 21 January 2016, at 2.3 UT, the CIPS instrument on the AIM satellite observed Polar Mesospheric Clouds (PMCs) with GW structures over Syowa. The orientation of the wave crests suggests north-west propagation direction. A periodogram analysis indicates GWs with horizontal wavelengths of 105 ± 5 and 60 ± 5 km. Cross-spectral analysis of the PANSY radar horizontal wind components at the same time, location, and altitude indicate two dominant waves with apparent periods of 15 and 9 h, with respective horizontal wavelengths of 100 ± 5 km and 302 ± 130 km. At the PMC altitude of ∼83 km, the mean zonal component of the vertical momentum flux spectra of the observed GWs is westward and the meridional component is northward. The comparable horizontal wavelengths of the 15 h wave observed by PANSY radar and the CIPS instrument, along with the agreement between the direction of vertical flux of horizontal momentum from PANSY, the propagation direction estimated from the cross-spectral analysis, and the orientation of the wave crests from CIPS i.e. north-west propagation direction suggests that the same wave is observed by both instruments. This simultaneous observation of the same wave by CIPS and PANSY radar provide a distinctive view of both the horizontal and vertical extent of a GW in the Antarctic summer mesosphere.