A case study of a mesospheric bore event observed with an all‐sky airglow imager at Tirunelveli (8.7°N)

Narayanan, Viswanathan Lakshmi; Gurubaran, S.; Emperumal, K.

doi:10.1029/2008jd010602

Cited by 32 publications

(47 citation statements)

References 32 publications

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“…Thus, the bore cannot be filtered out. Similar results have been reported by other imager observations (e.g., Taylor et al, 1995;Smith et al, 2003;She et al, 2004;Narayanan et al, 2009;Bageston et al, 2011b). Bageston et al (2011b) found that small winds in the wave propagation direction do not have influence on the duct configuration, emphasizing the thermal duct.…”

Section: Propagation Environment Of the Bore Eventsupporting

confidence: 80%

“…When only the OH emission observation is available, we are not able to discuss the complementary bore effect among different airglow layers. In contrast, bores with increased emission intensity behind the leading front have been reported by other observations Narayanan et al, 2009;Nielsen et al, 2006;Stockwell et al, 2006Stockwell et al, , 2011Fechine et al, 2009). In a recent paper, Bageston et al (2011a) reported a clear wave front followed by a series of wave crests.…”

Section: The Mesospheric Bore Eventmentioning

confidence: 46%

“…However, this parameter is not easy to verify in this study, because the crests behind the leading front of the bore become unclear after 20:30 UT. In addition, the newly formed crests cannot be detected from airglow observations if they are not strong enough to perturb the airglow layer (Narayanan et al, 2009). She et al (2004) suggested that the disappearing rate of wave crests associated with instability should also be considered.…”

Section: The Bore Parametersmentioning

confidence: 99%

“…Mesospheric bore events have been extensively reported in the literature (e.g., Brown et al, 2004;Fechine et al, 2009;Nielsen et al, 2006;Narayanan et al, 2009;She et al, 2004;Smith et al, 2003Smith et al, , 2005Smith et al, , 2006Stockwell et al, 2006Stockwell et al, , 2011Yue et al, 2009). These observations showed Map showing the locations of the all-sky airglow imager at Xinglong (red star), the meteor radar at Shisanling (blue triangle) and the Na lidar at Yanqing (red dot).…”

Section: Introductionmentioning

confidence: 99%

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Investigation of a mesospheric bore event over northern China

Yue

et al. 2013

Ann. Geophys.

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Abstract. A mesospheric bore event was observed using an OH all-sky airglow imager (ASAI) at Xinglong (40.2° N, 117.4° E), in northern China, on the night of 8–9 January 2011. Simultaneous observations by a Doppler meteor radar, a broadband sodium lidar, and TIMED/SABER OH intensity and temperature measurements are used to investigate the characteristics and environment of the bore propagation and the possible relations with the Na density perturbations. The bore propagated from northeast to southwest and divided the sky into bright and dark halves. The calculations show that the bore has an average phase velocity of 68 m s−1. The crests following the bore have a horizontal wavelength of ~ 22 km. These parameters are consistent with the hydraulic jump theory proposed by Dewan and Picard, as well as the previous bore reports. Simultaneous wind measurements from the Doppler meteor radar at Shisanling (40.3° N, 116.2° E) and temperature data from SABER on board the TIMED satellite are used to characterize the propagating environment of the bore. The result shows that a thermal-Doppler duct exists near the OH layer that supports the horizontal propagation of the bore. Simultaneous Na lidar observations at Yanqing (40.4° N, 116.0° E) suggest that there is a downward displacement of Na density during the passage of the mesospheric bore event.

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Section: Propagation Environment Of the Bore Eventsupporting

confidence: 80%

Section: The Mesospheric Bore Eventmentioning

confidence: 46%

Section: The Bore Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Investigation of a mesospheric bore event over northern China

Yue

et al. 2013

Ann. Geophys.

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“…However, in regions having variable horizontal winds, it is often important to account for these influences [Simkhada et al, 2009]. This more complete version of the dispersion relation may be written as [Nappo, 2013] …”

Section: Gravity Wave Environment Calculationsmentioning

confidence: 99%

Investigation of a mesospheric gravity wave ducting event using coordinated sodium lidar and Mesospheric Temperature Mapper measurements at ALOMAR, Norway (69°N)

et al. 2014

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New measurements at the ALOMAR observatory in northern Norway (69°N, 16°E) using the Weber sodium lidar and the Advanced Mesospheric Temperature Mapper (AMTM) allow for a comprehensive investigation of a gravity wave (GW) event on 22 and 23 January 2012 and the complex and varying propagation environment in which the GW was observed. These observational techniques provide insight into the altitude ranges over which a GW may be evanescent or propagating and enable a clear distinction in specific cases. Weber sodium lidar measurements provide estimates of background temperature, wind, and stability profiles at altitudes from~78 to 105 km. Detailed AMTM temperature maps of GWs in the OH emission layer together with lidar measurements quantify estimates of the observed and intrinsic GW parameters centered near 87 km. Lidar measurements of sodium densities also allow more precise identification of GW phase structures extending over a broad altitude range. We find for this particular event that the extent of evanescent regions versus regions allowing GW propagation can vary largely over a period of hours and significantly change the range of altitudes over which a GW can propagate.

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Characterization of a Double Mesospheric Bore Over Europe

et al. 2017

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Observations of a pair of mesospheric bore disturbances that propagated through the nighttime mesosphere over Europe are presented. The observations were made at the Padua Observatory, Asiago (45.9°N, 11.5°E), by the Boston University all‐sky imager on 11 March 2013. The bores appeared over the northwest horizon, approximately 30 min apart, and propagated toward the southeast. Using additional satellite and radar data, we present evidence indicating the bores originated in the mesosphere from a single, larger‐scale mesospheric disturbance propagating through the mesopause region. Furthermore, the large‐scale mesospheric disturbance appeared to be associated with an intense weather disturbance that moved southeastward over the United Kingdom and western Europe during 10 and 11 March.

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A case study of a mesospheric bore event observed with an all‐sky airglow imager at Tirunelveli (8.7°N)

Cited by 32 publications

References 32 publications

Investigation of a mesospheric bore event over northern China

Investigation of a mesospheric bore event over northern China

Investigation of a mesospheric gravity wave ducting event using coordinated sodium lidar and Mesospheric Temperature Mapper measurements at ALOMAR, Norway (69°N)

Characterization of a Double Mesospheric Bore Over Europe

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