Tidal wind mapping from observations of a meteor radar chain in December 2011

Yu, You; Wan, Weixing; Ning, Baiqi; Liu, Libo; Wang, Zhengui; Hu, Lianhuan; Ren, Zhipeng

doi:10.1029/2012ja017976

Cited by 71 publications

(77 citation statements)

References 46 publications

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“…However, there is a large discrepancy between the winds from FPI and HWM93 at ∼ 250 km. Secondly, the winds at the altitude of ∼ 87 km simultaneously measured from FPI and meteor radar at Beijing (∼ 100 km away from FPI, e.g., Yu et al, 2013) during April-May 2010 are compared with HWM07 (Jiang et al, 2012). The monthly averaged nighttime winds from FPI, meteors, and HWM07 exhibit a similar trend except for some discrepancy in the meridional winds.…”

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confidence: 77%

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FPI observations of nighttime mesospheric and thermospheric winds in China and their comparisons with HWM07

Yuan

Liu

et al. 2013

Ann. Geophys.

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We analyzed the nighttime horizontal neutral winds in the middle atmosphere (~ 87 and ~ 98 km) and thermosphere (~ 250 km) derived from a Fabry–Perot interferometer (FPI), which was installed at Xinglong station (40.2° N, 117.4° E) in central China. The wind data covered the period from April 2010 to July 2012. We studied the annual, semiannual and terannual variations of the midnight winds at ~ 87 km, ~ 98 km and ~ 250 km for the first time and compared them with Horizontal Wind Model 2007 (HWM07). Our results show the following: (1) at ~ 87 km, both the observed and model zonal winds have similar phases in the annual and semiannual variations. However, the HWM07 amplitudes are much larger. (2) At ~ 98 km, the model shows strong eastward wind in the summer solstice, resulting in a large annual variation, while the observed strongest component is semiannual. The observation and model midnight meridional winds agree well. Both are equatorward throughout the year and have small amplitudes in the annual and semiannual variations. (3) There are large discrepancies between the observed and HWM07 winds at ~ 250 km. This discrepancy is largely due to the strong semiannual zonal wind in the model and the phase difference in the annual variation of the meridional wind. The FPI annual variation coincides with the results from Arecibo, which has similar geomagnetic latitude as Xinglong station. In General, the consistency of FPI winds with model winds is better at ~ 87 and ~ 98 km than that at ~ 250 km. We also studied the seasonally and monthly averaged nighttime winds. The most salient features include the following: (1) the seasonally averaged zonal winds at ~ 87 and ~ 98 km typically have small variations throughout the night. (2) The model zonal and meridional nighttime wind variations are typically much larger than those of observations at ~ 87 km and ~ 98 km. (3) At ~ 250 km, model zonal wind compares well with the observation in the winter. For spring and autumn, the model wind is more eastward before ~ 03:00 LT but more westward after. The observed nighttime zonal and meridional winds on average are close to zero in the summer and autumn, which indicates a lack of strong stable tides. The consistency of FPI zonal wind with model wind at ~ 250 km is better than the meridional wind

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confidence: 77%

“…Comparison of the winds from the FPI and a meteor radar 100 km away (Yu et al, 2013) with HWM07 shows that, although the meridional wind from FPI has a similar trend as that from meteor radar, the observed FPI and meteor radar winds are weaker than the wind from HWM07 (Fig. 4 of Jiang et al, 2012).…”

Section: Midnight Winds At ∼ 87 Kmmentioning

confidence: 99%

FPI observations of nighttime mesospheric and thermospheric winds in China and their comparisons with HWM07

Yuan

Liu

et al. 2013

Ann. Geophys.

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“…Figure 6 shows a strong semidiurnal tide, which is a common feature in winter at northern mid-latitudes (Yue et al, 2010). Using the 4-station meteor radar chain dataset along the 120 • E meridian in the Northern Hemisphere in December 2011, Yu et al (2013) found that the semidiurnal tide dominates at northern mid-latitudes in the height range of 80-100 km with a peak around 96 km. Fechine et al (2009) reported a mesospheric bore propagating in a Doppler wind duct that was associated with a semidiurnal tidal oscillation in the meteor radar wind.…”

Section: Propagation Environment Of the Bore Eventmentioning

confidence: 99%

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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“…The peak meteor altitudes are around 90 km. In general, Meteor Radar has continuous time coverage and the meteor wind data are of high quality, as demonstrated by many previous studies (Zhao et al, 2005a,b;Yu et al, 2013). In this study, we used wind data acquired at 87 km and 97 km with a time resolution of 1 h for the period from August 2011 until April 2014.…”

Section: Data Collection Processmentioning

confidence: 83%

“…A Meteor Radar chain of four stations was gradually established over several years along the 120°E meridian in the northern hemisphere by the Institute of Geology and Geophysics, Chinese Academy of Sciences (IGGCAS). These radars are used for studying tidal structures in the upper atmospheric wind at altitudes of 80-100 km (Xiong et al 2004;Zhao et al, 2005a,b;Yu et al, 2013). For the F-region wind, Liu et al (2003a) developed a new approach to derive the vertical component equivalent wind (VEW) from ionosonde measurements, before investigating the climatology of VEW over Wuhan (114.4°E, 30.6°N) and then expanding it to global change (Liu et al, 2003b(Liu et al, ,c, 2004Luan et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Tidal wind mapping from observations of a meteor radar chain in December 2011

Cited by 71 publications

References 46 publications

FPI observations of nighttime mesospheric and thermospheric winds in China and their comparisons with HWM07

FPI observations of nighttime mesospheric and thermospheric winds in China and their comparisons with HWM07

Investigation of a mesospheric bore event over northern China

Climatological modeling of horizontal winds in the mesosphere and lower thermosphere over a mid-latitude station in China

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