In our previous articles, we have naturally assumed that the relationship between carbon dioxide dioxide (CO2) of the atmosphere and climate is generally known and accepted.
But the public discussion in recent weeks has shown us that not the necessarily the case. Therefore, some more information on the subject, something to bring more light into the darkness:
Since the mid-19th Century is well known that there are individual gases absorb heat radiation (absorption) and heat up in this way. But these are not the main components of air, ie nitrogen and oxygen, special gases, which occur more in small Mengenin the air, namely carbon dioxide and water vapor. The fraction of water vapor be up to 4% in air, while carbon dioxide makes up just 0.04% today, which is only about 1 / 100 of the water vapor content. Just these two gases cause up to 98% of the so-called greenhouse effect, are therefore for the current climate - and even the future! - The earth responsible. (Steam heat balance determines to 36 - 72%, carbon dioxide to 9 - 26%).
For physical calculations and experiments, it is apparent that our Earth's atmosphere have only one without greenhouse gases Durchschnittsgtemperatur of about -18 ° C would, or about 33 ° C would be colder than it is to GHG today.
Thus, there is almost sellbst that air cover would have a higher share of total greenhouse gases, a warmer atmosphere result. It should be noted but that the water vapor content of air strongly on the ambient temperature dependent, while the CO2 content can take almost any high values. The latter is therefore the more important of the two greenhouse gases.
We humans have succeeded during the last 200 years, the natural CO2 in the air of about 0.028% (280 ppm) to a current 0.039% increase (390 ppm). Although the values for the layman still appear very low, this is already an increase of almost 40%!
But the growth continues, and without effort we will get in this century a doubling compared to the natural value of the last millennia.
one should know precisely that the CO2 content in the recent Past several thousand years ago was relatively stable and only in the range of a few dozen ppm fluctuated, while we human beings through our intervention, namely from the combustion of coal, oil and gas and forest clearance and expansion of arable land have exalted him ppm already at over 100.
What impact would that have on the Earth system, is about 20 years intensively studied by climate scientists. Although there are still some uncertainties is already certain that the adverse consequences of unrestrained CO2 increase in the potential benefits far outweigh would.
Because our world is today in many places already densely populated with people, and hardly any alternative sites exist, could have smaller impacts of climate change, or rather, global warming is leading to population movements that provide the migrations of the historical past in the shade. To cite only one possible result: a sea level rise of well over a meter in this century is possible if we continue unhindered, to pump CO2 into the Atmosphäe.
What would mean only one meter of additional sea level, one can imagine with a little imagination and little knowledge of geography easily yourself.
But already, that which is now in the atmosphere is already too much and will in all probability determined by the climate changes in the next two to three decades. Because the climate system is sluggish due to the large surface of the oceans and reacted with a corresponding delay to changes in atmospheric composition.
why it makes sense to consider whether it is possible to remove a portion of the CO2 discharged again from the atmosphere, it is also equally important to drive further emissions from fossil fuels back. About The latter is currently negotiating in Copenhagen.
with technical means but it will always be very difficult to get significant amounts of CO2 from the air. Just the Energy expenditure for it would be huge. A cubic meter of air contains just under half a gram of CO2. One would have more than two million cubic meters of air "filter" to extract even one tonne of CO2.
We humans emit now but every year more than 30 billion tons of CO2 (see picture)! So no chance to solve the problem technically. But it would be possible to transfer the plants that work, because doing for several hundred million years the same thing: they see the air get CO2, carbon, and it build it into their biomass. Harvesting the plants could be one win from the carbon and on the same field the next generation of plants to obtain further coal use. And again and again!
As we have previously reported, is the so-derived biochar but also raw material for the terra preta, which is next to the carbon storage also one of the best plant fertilizer! This would be treading so actually a promising way to solve the climate problem.
questions and suggestions will be answered under our email address terrapreta@web.de
group Terra preta in the group of energy and environment
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