[Akufen]

Oorspronkelijk geplaatst door RodeLantaarn

Waterdamp is helemaal geen broeikasgas. Waar haal jij dat in godsnaam vandaan?

Waterdamp is niet alleen een broeikasgas maar HET voornaamste broeikasgas.

By far the most abundant greenhouse gas is water vapour (0-4% of the atmospheric gases); H2O traps one third of the heat trapped by all the gases. However, it should be kept in mind that when the effect of clouds is included the effect may be postive or negative since while clouds trap infrared radiation they also reflect solar raditiation back into space before it has a chance to reach, and warm, the earth's surface. Clouds furthermore absorb the most outgoing radiation since they contain liquid water which, while it has a very high heat capacity, it is an excellen absorber. The next most important greenhouse gas is carbon dioxide (0.03% of the atmospheric gases) which traps about 12% of the total radiation directly trapped by all the gases. In terms of human activities this is the gas of creates the greatest concern due to the large quantities in which they are released (more than 30% increase in atmospheric concentrations since a little over 100 years ago). The concentration of H2O vapour is essentially unaffected by human activities because it is already so high. Furthermore the concentraion is determined also by the saturation vapor pressure of the air which is determined by temperature and will cause the vapour to condense into a liquid which will result in its removal due to gravity (rain).