Slides in this set
· This doesn't prove
· Temperature did not
1960 and 1978.
rose from 320 ppm
to almost 340 ppm.
There are still many flaws in our scientific understanding of climate change which
suggests that climate models are not completely reliable. These flaws include:
The Impact of sulphate particles
Discrepancies between surface temperature and upper air temperatures
Criticisms of sea level predictions…read more
Impact of Sulphate molecules
There is an increasing awareness of the cooling role of sulphate aerosols.
Many climate change models do not take aerosols into account and the `masking
effect' of aerosols may have been responsible for earlier overestimates of the rate of
The IPCC has stated that "there is growing evidence that increases in sulphate aerosols
are partially counteracting the warming".
Discrepancies between surface temperature and
upper air temperatures.
There has been measurements indicating a rise in temperature in the Earths surface,
however there has been little warming of the atmosphere up to 5 miles from the
Criticism of sea level predictions
There are some factors that could reduce the impact of melting of the icecaps e.g.
increased evaporation from the ocean due to higher water temperatures. This
suggests that the sea level issue has been dramatized.
Increased evaporation from the ocean may lead to
a more rapid accumulation of polar ice, and thus a
lowering sea level.
"Our current understanding of the mechanisms of Climate Change is
insufficiently developed to justify the stringent measures that many
scientists, environmentalists and governments say are now
needed." George W Bush…read more