Weather n Climate | VOL. 10, ISSUE 63, November-December 2010 |

Evolution, Climate Change and Oriental Monsoon

The Earth’s atmosphere comprises of 78.08 per cent of nitrogen, 20.95 per cent of oxygen; rest are argon, carbon dioxide, water vapour and traces of various other gases. The total mass of the atmosphere is 5 x 105 metric tons, 80 per cent of which is confined to about 12 km. There is no definite boundary between the atmosphere and the outer space although the atmospheric effect is noticeable up to the altitude of 120 km. For practical purposes, the...

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