Investigation of a mesospheric bore event over northern China

Li, Q.; Xu, Jiyao; Yue, Jia; Liu, X.; Yuan, Wei; Ning, Baiqi; Guan, Shouliang; Younger, J. P.

doi:10.5194/angeo-31-409-2013

Cited by 27 publications

(31 citation statements)

References 40 publications

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“…Simultaneous occurrences of a mesospheric inversion layer (MIL) with a bore event have been reported with optical imaging and lidar observations (She et al, ; Smith et al, ). Simultaneous occurrences of a Doppler duct or a thermal‐Doppler duct have also been reported with optical imaging, radar, and TIMED/SABER (Thermosphere Ionosphere Mesosphere Energetics and Dynamics Satellite/ Sounding of the Atmosphere using Broadband Emission Radiometry) (Bageston, Wrasse, Batista, et al, ; Fechine et al, ; Li et al, , ).…”

Section: Introductionmentioning

confidence: 88%

Geographical and Seasonal Variability of Mesospheric Bores Observed from the International Space Station

et al. 2019

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Geographical and seasonal variations of mesospheric bores were derived from mesospheric airglow observations by the Visible and near Infrared Spectral Imager (VISI) of Ionosphere, Mesosphere, upper Atmosphere and Plasmasphere (IMAP) mission onboard the International Space Station. In the three‐year data set spanning September 2012 to August 2015, 306 mesospheric bore events were found between 55ºS and 55ºN in the O2(0‐0) airglow whose peak height is around 95 km. The distribution of the bore events showed a high occurrence at equatorial latitudes especially during the equinox seasons and at winter midlatitudes. These latitudes and seasons are also known for being the place and time where the migrating diurnal and semidiurnal tides have a large temperature amplitude at the upper mesosphere altitude. This coincidence suggests that the majority of mesospheric bores occurred in a temperature inversion layer, which is related to the tides. The local time variation of the bore occurrences at midlatitudes showed a minimum around midnight. The local time variation at equatorial latitudes is more widely distributed compared to those at midlatitudes. The dominant propagation direction of mesospheric bores is from the winter hemisphere to the summer hemisphere.

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Section: Introductionmentioning

confidence: 88%

Geographical and Seasonal Variability of Mesospheric Bores Observed from the International Space Station

et al. 2019

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“…The airglow emission intensities were weakened behind the leading bore front in both OH and OI (557.7 nm) images. Li et al () also found a mesospheric bore event propagated into a bright airglow region leaving a dark region behind the leading bore front from an OH all‐sky airglow imager over Xinglong station (40.2 °N, 117.4°E).…”

Section: Observations and Data Analysismentioning

confidence: 93%

“…The bore divides nightglow into bright and dark regions. Since a mesospheric bore was first reported by Taylor et al (), many researchers have devoted much effort to investigating this interesting phenomenon using ground‐based all‐sky airglow imagers (Li et al, ; Medeiros et al, ; Narayanan et al, ; Nielsen et al, ; She et al, ; Shiokawa et al, ; Smith et al, , , , ; Yue et al, ), satellite observation (Miller et al, ), and models (Dewan & Picard, , ; Laughman et al, ; Seyler, ).…”

Section: Introductionmentioning

confidence: 99%

Evolution of a Mesospheric Bore in a Duct Observed by Ground‐Based Double‐Layer Imagers and Satellite Observations Over the Tibetan Plateau Region

Yue

et al. 2019

JGR Space Physics

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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.

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“…Three PMC Turbo images from large‐FOV cameras revealing some of the diversity of dynamics in regions of ~40–60 km in width are shown in Figure . Figure a shows what appears to be a GW front with trailing vortices, an intrusion, or most likely a mesospheric bore at 13:50 UT on 13 July, based on interpretations of similar imaging (Fechine et al, ; Fritts et al, ; Li et al, ; Miller et al, ; Narayanan et al, ; Smith et al, ; and references therein).…”

Section: Pmc Turbo Event Imagingmentioning

confidence: 97%

PMC Turbo: Studying Gravity Wave and Instability Dynamics in the Summer Mesosphere Using Polar Mesospheric Cloud Imaging and Profiling From a Stratospheric Balloon

et al. 2019

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The Polar Mesospheric Cloud Turbulence (PMC Turbo) experiment was designed to observe and quantify the dynamics of small‐scale gravity waves (GWs) and instabilities leading to turbulence in the upper mesosphere during polar summer using instruments aboard a stratospheric balloon. The PMC Turbo scientific payload comprised seven high‐resolution cameras and a Rayleigh lidar. Overlapping wide and narrow camera field of views from the balloon altitude of ~38 km enabled resolution of features extending from ~20 m to ~100 km at the PMC layer altitude of ~82 km. The Rayleigh lidar provided profiles of temperature below the PMC altitudes and of the PMCs throughout the flight. PMCs were imaged during an ~5.9‐day flight from Esrange, Sweden, to Northern Canada in July 2018. These data reveal sensitivity of the PMCs and the dynamics driving their structure and variability to tropospheric weather and larger‐scale GWs and tides at the PMC altitudes. Initial results reveal strong modulation of PMC presence and brightness by larger‐scale waves, significant variability in the occurrence of GWs and instability dynamics on time scales of hours, and a diversity of small‐scale dynamics leading to instabilities and turbulence at smaller scales. At multiple times, the overall field of view was dominated by extensive and nearly continuous GWs and instabilities at horizontal scales from ~2 to 100 km, suggesting sustained turbulence generation and persistence. At other times, GWs were less pronounced and instabilities were localized and/or weaker, but not absent. An overview of the PMC Turbo experiment motivations, scientific goals, and initial results is presented here.

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Investigation of a mesospheric bore event over northern China

Cited by 27 publications

References 40 publications

Geographical and Seasonal Variability of Mesospheric Bores Observed from the International Space Station

Geographical and Seasonal Variability of Mesospheric Bores Observed from the International Space Station

Evolution of a Mesospheric Bore in a Duct Observed by Ground‐Based Double‐Layer Imagers and Satellite Observations Over the Tibetan Plateau Region

PMC Turbo: Studying Gravity Wave and Instability Dynamics in the Summer Mesosphere Using Polar Mesospheric Cloud Imaging and Profiling From a Stratospheric Balloon

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