Thermally driven diurnal tide in the atmosphere
作者:
R. S. Lindzen,
期刊:
Quarterly Journal of the Royal Meteorological Society
(WILEY Available online 1967)
卷期:
Volume 93,
issue 395
页码: 18-42
ISSN:0035-9009
年代: 1967
DOI:10.1002/qj.49709339503
出版商: John Wiley&Sons, Ltd
数据来源: WILEY
摘要:
AbstractThe theory for the diurnal tide in the atmosphere is reviewed and the appropriate Hough Functions (including those with negative equivalent depths) are described. The main thermal drives for the diurnal tide — insolation absorption by O3and H2O — are described. The theory is then used to compute the atmosphere's response to the thermal drives. It is shown that the small amplitude of the diurnal surface pressure oscillation results from most of the thermal drive being used to activate trapped modes. The calculated winds are in reasonable agreement with observations of the diurnal wind oscillation from the troposphere to the upper mesosphere. In addition the tidal wind agrees strikingly with single time observations of the total wind in the upper‐air. The temperature and vertical wind distributions and the upward flux of energy due to the diurnal tide are also calculated. The last item amounts to 6·8 ergs cm−2sec−1at the Equator which is about 2·5 times the downward solar flux in bands absorbable in the thermosphere. The average tidal flux over all latitudes is, however, considera
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