Annual
anomalies of maximum and
minimum temperatures
and diurnal
temperature range (DTR)
(¡C) averaged for
the 71% of global
land areas for 1950 to
2004.
DTR 1979-2004
Issues:
1.Missing data and treatment
2.Quality control
3.Max and Min T much more
sensitive
to inhomogeneities4. Urban heat
island
5. Need to continue to pressure
countries
to provide high
frequency
data (hourly and daily)
Temperatures
IPCC 2007