Sentences with phrase «atmospheric lifetime so»

Unlike CFCs and similar long - lived gases that are responsible for most ozone depletion, dichloromethane has a short atmospheric lifetime so has not been controlled by the Montreal Protocol.

Not exact matches

But this is silly, since the atmospheric lifetime of aerosols is just a matter of days, so once we stop burning coal, as we eventually must, the aerosols disappear quickly, unmasking the pent - up warming due to all the extra CO2 we emitted by not switching from coal to natural gas.

However, we only started seriously reducing CFC emissions 20 years ago (with the Montreal Protocol - the ozone version of the Kyoto Protocol), and CFCs have a long atmospheric lifetime, so the recovery will take time.

1) Due to the short atmospheric lifetime of tropospheric sulfates, if their cooling effect was so large we would observe cooling or, at the very least, less warming over the emitting areas and downwind from them, especially China and some Eastern European regions.

«scientists have assumed» «The climate models assume» «assumption that Natural CO2 is totally fixed and unchanging» «if you assume a long lifetime for atmospheric CO2 ″ «falsification of the basic assumption» «it requires assumptions that violate empirical knowledge» «assumed so that the ice cores and modern measurements fit together» «arbitrary and unjustified assumption»

For example, the direct radiative effect of a mass of methane is about 84 times stronger than the same mass of carbon dioxide over a 20 - year time frame [22] but it is present in much smaller concentrations so that its total direct radiative effect is smaller, in part due to its shorter atmospheric lifetime.