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- W2004709868 abstract "Abstract Hydroxyl (OH) rotational temperatures near 85 km altitude have been monitored at Calgary, Alberta, Canada (51°N, 114°W) since 1981 with the objective of determining velocities, wavelengths and periods associated with moving temperature structures. A technique is described whereby the velocity of moving patterns in two dimensional data sets can be accurately determined and used as a parameter for a global smoothing algorithm. Velocities of the structures in the meridional direction were found to be directed poleward. Corresponding Doppler bulk wind velocities measured near the 95 km height region were directed equatorward indicating the presence of filtering of internal gravity waves by the background wind. Two coherent wave structures were often observed simultaneously during a night. The smaller of the two structures had true wavelengths less than 15–30 km and may be related to billow clouds often reported in noctilucent cloud observations. The second wave has a period on the order of an hour and meridional wavelengths ranging from 100 to 2000 km." @default.
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- W2004709868 date "1988-07-01" @default.
- W2004709868 modified "2023-09-26" @default.
- W2004709868 title "The analysis of hydroxyl rotational temperatures to characterize moving thermal structures near the mesopause" @default.
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- W2004709868 doi "https://doi.org/10.1016/0021-9169(88)90064-5" @default.
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