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"The
Earth’s surface
temperature is shown
year by year (red bars)
and approximately decade
by decade (black line,
a filtered annual curve
suppressing fluctuations
below near decadal time-scales).
There
are uncertainties in
the annual data (thin
black whisker bars represent
the 95% confidence range)
due to data gaps, random
instrumental errors
and uncertainties, uncertainties
in bias corrections
in the ocean surface
temperature data and
also in adjustments
for urbanisation over
the land. Over both
the last 140 years and
100 years, the best
estimate is that the
global average surface
temperature has increased
by 0.6 ± 0.2°C.
Based
upon Chapter 2, Figure
2.7c"
Source
& © :
IPCC TAR SPM of WG I
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