"Warming of the climate system is unequivocal, and since the 1950s, many of the observed changes are unprecedented over decades to millennia. The atmosphere and ocean have warmed, the amounts of snow and ice have diminished, sea level has risen, and the concentrations of greenhouse gases have increased"
Reading this I must ask: What about the 35 year-long temperature rise from 1910 to about 1945? It looks to me to be very similar (about 0.5C rise) to the more recent run-up from the late 1970s to about 2000. You will note that the global temperatures were falling from before 1880 until 1910 and then there were two periods when temperatures were steady or fell somewhat. The first period from the mid 1940s until the late 1970s then starting again from 2000 to today.
This suggests to me that there is more in play here than just increasing CO2, since a similar rise was seen prior to the period when the majority of CO2 was emitted.
According to the latest IPCC report (2013)
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