l'effet de serre par le co2 et les gaz traces greenhouse effect from co2 and trace gases
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Abstract
According to a fairly widespread opinion, CO2 and trace gases, which have been produced by human activity since the start of the industrial revolution (1850), mainly from combustion and deforestation, and have been progressively accumulating in the Earth's atmosphere, could result in a greenhouse effect that could cause the heating up of the Earth by several degrees in the 21st century. The climatic consequences (melting of ice, etc. ) would be disastrous. Therefore, we examined the leading parameters involved in this phenomenon: nature of the greenhouse effect, carbon cycle, CO2 transfer on a worldwide scale, trace gases, climatic consequences of the greenhouse effect due to CO2 and trace gases. We reached the following conclusions:(a) The CO2 and trace-gas concentration in the atmosphere increases exponentially in the absence of any regulations, and this occurs at the same time as human production of the same substances also at an exponential rate. (b) No increase has as yet been detected in the Earth's average temperature due to the greenhouse effect. Moreover, since 1940 we have been going through a period of cooling. (c) Human activity also produces antagonistic cooling effects (effect of dust in the atmosphere, etc. ) that are rather poorly understood. (d) The study of ancient climates indicates a regular succession of cool and warm periods, which should reassure us about any sudden and irreversible change in the climate. (e) However, it is absolutely necessary to improve our fundamental understanding of the main factors governing the Earth's climate (chemistry of the atmosphere, ocean/ atmosphere transfers, etc. ) and eventually to limit the production of some trace gases (Freon, in particular).
| Reference Key |
a.2006oill'effet
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|---|---|
| Authors | ;Bertrand A. |
| Journal | addiction (abingdon, england) |
| Year | 2006 |
| DOI |
10.2516/ogst:1987038
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| URL | |
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