Mid‐Latitude Thermosphere‐Ionosphere Na (TINa) Layers Observed With High‐Sensitivity Na Doppler Lidar Over Boulder (40.13°N, 105.24°W) Geophysical Research Letters
收藏NOAA Institutional Repository2023-09-12 更新2026-04-25 收录
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https://doi.org/10.1029/2021gl093729
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资源简介：
We report the first lidar observations of regular occurrence of mid-latitude thermosphere- ionosphere Na (TINa) layers over Boulder (40.13°N, 105.24°W), Colorado. Detection of tenuous Na layers ( ∼0.1–1 cm−3 from 150 to 130 km) was enabled by high-sensitivity Na Doppler lidar. TINa layers occur regularly in various months and years, descending from ∼125 km after dusk and from ∼150 km before dawn. The downward-progression phase speeds are ∼3 m/s above 120 km and ∼1 m/s below 115 km, consistent with semidiurnal tidal phase speeds. One or more layers sometimes occur across local midnight. Elevated volume mixing ratios above the turning point ( ∼105–110 km) of Na density slope
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NOAA
创建时间：
2023-09-12
