The Wind Systems in the Case of Heating the Upper Part of the Ozonosphere and the Lower One of the Thermosphere

Matsushima Akira

doi:10.20630/chirikagaku.25.0_18

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Other Title

上部オゾン層と熱圏下部を加熱した場合の風系について
ジョウブオゾンソウトネッケンカブオカネツシタバアイノフウケイ

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Description

The general circulation in the atmosphere is simulated, which is caused by periodical heating of the upper part of the ozonosphere and the lower part of the thermosphere in the same phase. If the heat in these heating layers becomes maximum in May, the following phenomena may occur in the circulation of the upper atmosphere. i ) Three nodes appear in the vertical distribution of the zonal wind. And the westerly regions and the easterly regions distribute alternately. The regions of the westerly appear in the layer of around 50-70 km and in the layer higher than 90km in altitude, altitude the regions of the easterly appear in the layer lower than 50km and in the layer around 80-90km. The maximum velocity of these winds occurs in February. ii) On the other hand, the regions of the northerly appear in the same layers as the westerly, while the regions of the southerly appear in the same layers as the easterly. Their maxima occur in May. iii) The thermosphere and the part of the mesosphere higher than around 70km in altitude are heated dynamically as a result of the general circulation. This dynamic heating reaches maximum in February. iv) A stationary depression is 10cated in the lower part (around 100km) of the thermosphere in winter.

Journal

GEOGRAPHICAL SCIENCES

GEOGRAPHICAL SCIENCES 25 (0), 18-26, 1976

THE JAPANESE SOCIETY FOR GEOGRAPHICAL SCIENCES