"You take the blue pill and the story ends. You wake in your bed and you believe whatever you want to believe."
"You take the red pill and
you stay in Wonderland and I'll show you how deep the
rabbit-hole goes."
Vital Climate Graphics :
Introduction to
climate change
Next: CO2 Concentration
in the atmosphere: Mauna Loa curve
5. The table lists some of the main
greenhouse gases and their concentrations in pre-industrial times and
in 1994; atmospheric lifetimes; anthropogenic sources; and Global
Warming Potential (GWP). GWP is an index defined as the cumulative
radiative forcing between the present and some chosen time horizon
caused by a unit mass of gas emitted now, expressed relative to a
reference gas such as CO2, as is used here. GWP is an attempt to
provide a simple measure of the relative radiative effects of
different greenhouse gases. The future global warming commitment of a
greenhouse gas can be calculated over a chosen time horizon (such as
100 years) by multiplying the appropriate GWP by the amount of gas
emitted. The choice of time horizon will depend on policy
considerations. There are several other points that need to be kept in
mind when using GWPs: (i) the typical uncertainty value is +/-35%, not
including the uncertainty in the CO2 reference; (ii) GWPs are based on
the radiative forcing concept and are therefore difficult to apply to
radiatively important constituents that are unevenly distributed in
the atmosphere; and (iii) GWPs need to take into account any indirect
effects of the emitted gases if they are to correctly reflect future
warming potential.
Next: CO2 Concentration
in the atmosphere: Mauna Loa curve
Vital Climate Graphics :
Introduction to
climate change
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