Mesosphere/lower thermosphere wind regime parameters using a newly installed SKiYMET meteor radar at Kazan (56°N, 49°E)

Korotyshkin, D.; Merzlyakov, E. G.; Sherstyukov, O. N.; Valiullin, F.

doi:10.1016/j.asr.2018.12.032

Cited by 14 publications

(6 citation statements)

References 26 publications

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“…The mean Fourier spectrum for the temperature lidar data is calculated for two altitude domains, [21][22][23][24][25][26][27][28][29][30][31][32] and [32][33][34][35][36][37][38][39][40][41][42] km in summing all 10 individual spectra for each time series (Figure 4). These 10 individual spectra are computed from time series for 10 heights within the two height ranges.…”

Section: Vertical Propagation Analysis Using Era5 Data Rayleigh Lidar...mentioning

confidence: 99%

“…We will therefore assume an error of 20 m/s for the meridional and zonal wind speed. This number corresponds to the average tidal range in the upper atmosphere [37][38][39][40][41]. The HWM07 model was used instead of its improved version, namely, HWM14 [42] because we are used to using it and HWM14 was not available.…”

Section: Vertical Propagation Analysis Using Era5 Data Rayleigh Lidar...mentioning

confidence: 99%

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Observation of Gravity Wave Vertical Propagation through a Mesospheric Inversion Layer

Keckhut

Hauchecorne

et al. 2022

Atmosphere

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The impact of a mesospheric temperature inversion on the vertical propagation of gravity waves has been investigated using OH airglow images and ground-based Rayleigh lidar measurements carried out in December 2017 at the Haute-Provence Observatory (OHP, France, 44N). These measurements provide complementary information that allows the vertical propagation of gravity waves to be followed. An intense mesospheric inversion layer (MIL) observed near 60 km of altitude with the lidar disappeared in the middle of the night, offering a unique opportunity to evaluate its impact on gravity wave (GW) propagation observed above the inversion with airglow cameras. With these two instruments, a wave with a 150 min period was observed and was also identified in meteorological analyses. The gravity waves’ potential energy vertical profile clearly shows the GW energy lost below the inversion altitude and a large increase of gravity wave energy above the inversion in OH airglow images with waves exhibiting higher frequency. MILs are known to cause instabilities at its top part, and this is probably the reason for the enhanced gravity waves observed above.

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Section: Vertical Propagation Analysis Using Era5 Data Rayleigh Lidar...mentioning

confidence: 99%

Section: Vertical Propagation Analysis Using Era5 Data Rayleigh Lidar...mentioning

confidence: 99%

Observation of Gravity Wave Vertical Propagation through a Mesospheric Inversion Layer

Keckhut

Hauchecorne

et al. 2022

Atmosphere

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“…Ltd. of Adelaide, Australia, jointly developed with Modular Antenna Radar Designs of Canada. This implementation of the all‐sky meteor radar was chosen for its robustness and performance history in providing reliable science data, with multiple sites over the globe (Ballinger et al., 2008; Deepa et al., 2006; Fritts et al., 2012; Hibbins et al., 2005; Jones et al., 2005; Korotyshkin et al., 2019; Meek et al., 2013; Nesse et al., 2008; Stober & Chau, 2015; Stober et al., 2020). A detailed overview of SKiYMET radar hardware and detection algorithms can be found in Hocking et al.…”

Section: Mcmurdo Meteor Radarmentioning

confidence: 99%

First Observations From a New Meteor Radar at McMurdo Station Antarctica (77.8°S, 166.7°E)

2022

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A new 36.17 MHz all‐sky meteor radar was installed at McMurdo Station Antarctica (77.8°S, 166.7°E) in February 2018 to provide wind measurements in the mesosphere and lower thermosphere (MLT) region (70–120 km). This instrument is the highest latitude meteor radar currently in operation in the southern hemisphere; it joins two other meteor radars within the Antarctic Circle. The radar will provide long‐term continuous wind measurements of the polar region, and contribute to a greater understanding of MLT dynamics. This work describes the radar hardware and its context with other instruments in the region. The paper provides an overview of the spatial and temporal variation in meteor echoes over the observation period of March 2018 through October 2021. It also provides an analysis of the mean winds and solar tides over the first three years of operation; including a description of an observed 12 hr summertime wind oscillation consistent with previously documented observations of a westward propagating 12 hr non‐migrating tide of zonal wavenumber 1.

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“…The heights of the individual meteor trail reflections vary between about 75 and 110 km, and the maximum meteor count rate is found at an altitude slightly below 90 km (e.g., Stober et al, 2008). The Kazan (56 • N, 49 • E) SKiYMET radar has been operating since 2015 (Korotyshkin et al, 2019b). This radar is equipped with a 15 kW transmitter, allowing high meteor rates and thus providing sufficient statistics for whole day observation in the height region 80-100 km.…”

Section: Dataset Descriptionmentioning

confidence: 99%

Influence of geomagnetic disturbances on mean winds and tides in the mesosphere/lower thermosphere at midlatitudes

et al. 2021

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Abstract. Observations of upper mesosphere/lower thermosphere (MLT) wind have been performed at Collm (51.3∘ N, 13.0∘ E) and Kazan (56∘ N, 49∘ E), using two SKiYMET all-sky meteor radars with similar configuration. Daily vertical profiles of mean winds and tidal amplitudes have been constructed from hourly horizontal winds. We analyse the response of mean winds and tidal amplitudes to geomagnetic disturbances. To this end, we compare winds and amplitudes for very quiet (Ap ≤ 5) and unsettled/disturbed (Ap ≥ 20) geomagnetic conditions. Zonal winds in both the mesosphere and lower thermosphere are weaker during disturbed conditions for both summer and winter. The summer equatorward meridional wind jet is weaker for disturbed geomagnetic conditions. Tendencies for geomagnetic effects on mean winds over Collm and Kazan qualitatively agree during most of the year. For the diurnal tide, amplitudes in summer are smaller in the mesosphere and greater in the lower thermosphere, but no clear tendency is seen for winter. Semidiurnal tidal amplitudes increase during geomagnetic active days in summer and winter. Terdiurnal amplitudes are slightly reduced in the mesosphere during disturbed days, but no clear effect is visible for the lower thermosphere. Overall, while there is a noticeable effect of geomagnetic variability on the mean wind, the effect on tidal amplitudes, except for the semidiurnal tide, is relatively small and partly different over Collm and Kazan.

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Mesosphere/lower thermosphere wind regime parameters using a newly installed SKiYMET meteor radar at Kazan (56°N, 49°E)

Cited by 14 publications

References 26 publications

Observation of Gravity Wave Vertical Propagation through a Mesospheric Inversion Layer

Observation of Gravity Wave Vertical Propagation through a Mesospheric Inversion Layer

First Observations From a New Meteor Radar at McMurdo Station Antarctica (77.8°S, 166.7°E)

Influence of geomagnetic disturbances on mean winds and tides in the mesosphere/lower thermosphere at midlatitudes

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