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Fig. 5.1 Observed changes in a global average surface temperature; b global average sea level
rise from tide gauge (blue) and satellite (red) data and c Northern Hemisphere snow cover for
March
1990.
Smoothed curves represent decadal averaged values while circles show yearly values. The shaded
areas are the uncertainty intervals estimated from a comprehensive analysis of known
uncertainties (a and b) and from the time series (c) (IPCC 2007)
April. All changes are relative to corresponding averages for the period 1961
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5.2 General Problems of Global Climate Dynamics
A growing interest in the problems of global climate change determined by its great
practical value and contradictory character of assessments of anthropogenic con-
tribution to climate change, dictates,
first of all, a necessity of analysis of the
available observational data. Studies of global climate change are connected,
first of
all, with an accomplishment of the World Climate Research Programme (WCRP)
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