Density and temperature profiles measured in the mesosphere and lower thermosphere during winter anomaly conditions

Becker, M.; Bäte, J.; Papanikas, D. G.; Friedrich, V.; Offermann, D.; Loidl, A.; Schwentek, H.; Thrane, E. V.

doi:10.1016/0021-9169(79)90083-7

Cited by 15 publications

(2 citation statements)

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“…The temperature increase in the mesosphere is brought about mainly by the planetary-scale wave 1 which propagates vertically from the stratosphere. Such temperature increases have been observed during winter anomalous days by in situ measurements (BECKER et al, 1979). It is, therefore, quite natural that the winter anomaly can be controlled by the wave l activity in the mesosphere.…”

Section: Methods Of Analysismentioning

confidence: 76%

“…The temperature consequently means the averaged one over the range. According to in situ measurements of temperature by means of rocket-sondes and so on (LABITZKE, 1972;BECKER et al, 1979), the vertical profile of temperature shows an abrupt change with height with a sharp maximum in the mesosphere at a stage of midwinter warmings. Therefore, the actual temperature increase may be much larger at a mesospheric height than that measured by the PMR channel 3000.…”

Section: Methods Of Analysismentioning

confidence: 99%

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The D-region winter anomaly and dynamical effects of atmospheric planetary-scale waves.

Muraoka

1985

J. geomagn. geoelec

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A study is presented of the D-region winter anomaly, observed by ground based measurements of long-distance VLF radio wave propagation and HF radio wave vertical sounding at several stations located in and near Japan over 3 winters from 1974 to 1977. These winters have different meteorological conditions (i.e., a major stratospheric sudden warming in the winter 1976/77, a minor warming in 1974/75 and no warmings in 1975/76). The activity of the anomaly is compared with that of planetary-scale waves using atmospheric data in the lower stratosphere and radiance data in the upper stratosphere and mesosphere obtained by the PMR (Pressure Modulator Radiometer) on board Nimbus 6 satellite. The latitudinal extent and duration of the anomaly are shown to be primarily controlled by the amplification of planetary-scale wave with zonal wavenumber 1. When a major warming took place as a result of an unusual amplification of wave 1, an intense event of the anomaly was observed for a long time. However,

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Section: Methods Of Analysismentioning

confidence: 76%

Section: Methods Of Analysismentioning

confidence: 99%