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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Evolution of a Mesospheric Bore in a Duct Observed by Ground-Based Double-Layer Imagers and Satellite Observations Over the Tibetan Plateau Region
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Evolution of a Mesospheric Bore in a Duct Observed by Ground-Based Double-Layer Imagers and Satellite Observations Over the Tibetan Plateau Region

机译：进化的中层生管通过地面双层成像系统卫星观测青藏高原地区

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摘要

A mesospheric bore event was observed in the airglow layers of both OH and OI (557.7 nm) bands by two all-sky airglow imagers in Lhasa (29.66°N, 90.98°E) on the Tibetan Plateau and the Day Night Band (DNB) of the Visible Infrared Imaging Radiometer Suite (VIIRS) onboard the Suomi National Polar-orbiting Partnership (NPP) satellite on the night of 16-17 December 2014. Simultaneous temperature and OH intensity observations from the Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) instrument onboard the TIMED satellite and wind measurement by a Doppler meteor radar were used to characterize the environment of the bore propagation. A large mesospheric inversion layer was identified from the temperature measured by the SABER instrument. The observed winds in the height range of the OH layer were almost orthogonal to the propagation direction of the mesospheric bore. Both hydraulic jump theory and observations showed that the duct initially shrank followed by an expansion. The duct mainly existed in the OH layer but was weak in the OI layer, as revealed by the double-layer imaging and satellite observations. The horizontal wavelengths and observed phase speeds of the bore packet decreased as the duct shrank and increased as the duct expanded. The intensity amplitude of the bore packet decreased slowly and then decreased sharply after dissipation. With the variation of the depth of the duct, the bore may have leak out of the duct. The presented study advances the understanding of mesospheric bore evolution and how the ducted environment influences the propagation of the bore.
机译：一个中层生事件中观察到大气光层哦和OI(557.7海里)由两个全天在拉萨大气光成像系统(29.66°N,90.98°E)在青藏高原和夜晚的那一天乐队(DNB)可见红外成像辐射计(VIIRS)在芬兰语国家极轨伙伴关系(NPP)2014年12月卫星晚16 - 17。同时温度和强度哦从大气的测深观测使用宽带发射辐射测量(剑)仪器上的卫星和风力多普勒测量的流星雷达生的环境特征传播。被确定的温度来衡量军刀的乐器。高度的范围哦层几乎的传播方向正交中间层的孔。观测表明,最初管收缩扩张紧随其后。在哦层存在,但弱OI层,双层成像显示的和卫星观测。波长和观察孔的速度阶段包下降管萎缩和增加随着管扩大。孔包下降缓慢耗散后大幅下降。管的深度的变化,可能有泄漏的管道。提出了对中层生的理解进化和管道中的环境影响孔的传播。

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