The technical human intervention in the climate system would
have serious consequences
That would be great, if the climate will fail politically,
and finally, the Earth is heating up, no brakes, we solve the problem simply
technical. "Geo engineering" refers to a technical intervention in
the climate system - for example, when particles in the air blow in order to
reduce the sunlight. This would have serious consequences, however, as a
European research team has now been found.
Geo-engineering would be Europe and other regions of the earth
will bring more droughts.
Huge mirrors absorb
light
Another option in addition to the enrichment of the
atmosphere with particulate matter would be to post huge mirrors in Earth
orbit. As a result of the measures, the results of the research, although the
temperatures would drop back to normal - but at the same time would
significantly decrease the rainfall on Earth.
That would mean that in Europe and North America about 15
percent drier than would be before the start of human-induced climate change.
Will in the Amazon rain as much as 20 percent, the researchers report in the
journal "Earth System Dynamics".
Remove greenhouse
gases
About geo-engineering should either remove greenhouse gases
from the atmosphere or the solar radiation is reduced to the surface. Both
should help to slow down climate change and halt global warming.
"Such measures have been proposed as a temporary
solution for the case that climate change efforts fail or fail, the
consequences of global warming more severe than expected". But the side
effects of such interventions in the global climate system have been explored
only in part.
Climate would be
different
"The main message of our experiment is that the
generated by geo-engineering climate is different than any pre-existing
natural". One could, the climate such measures do not simply turn back to
a previous state.
Even if the temperature gets back to lower levels, there are
crucial differences. "Geo-engineering can not therefore be considered a
substitute for a climate change by reducing greenhouse gas emissions," the
researchers conclude.
Four climate models
The scientists studied using four climate models, such as
the Earth's climate responds to measures to reduce the sunlight. In their
scenario, scientists believe that the atmosphere is four times as much carbon
dioxide (CO2) still contains the beginning of industrialization - then there
were around 280 ppm (parts per million, parts per million).
"Such a quadruple is at the upper end of the forecast
breadth, but is still within the range of what would be the end of the 21st
century possible," says Max Planck meteorologist Schmidt. To simulate a
geo-engineering measure, the researchers then lowered the sunlight in their
models to such an extent that the extra CO2 caused by the greenhouse effect has
been compensated.
Much less precipitation
The outcome measure, the researchers compared the simulated
climate of the earth before the Industrial Revolution. In all four models had
manipulated the climate was drier than in the same scenario, the researchers
report. The rainfall amounts were lower by an average of 4.8 percent worldwide.
Particularly
strongly decreased while the rainfall over North America, the northern part of
Eurasia and South America. In the Amazon, it was dry as much as 20 percent. The
average global temperature was, however, similar as in the comparative
scenario, however, cooled the tropics are somewhat stronger than the polar
regions.