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6 <br /> �r <br /> change �QMY) <br /> temperaturesshifts in <br /> 0 <br /> E t>O ) �. <br /> G <br /> .OM W <br /> -100 -u <br /> 1 SOU <br /> ➢ J�ai41 � <br /> 1 1900 1960 <br /> Y"r <br /> • Global sea level rise started-1860, well before <br /> + fossil carbon emissions became significant. <br /> a <br /> ' � a • i a "` it � i i <br /> r <br /> Clir1-'ate is generally stableClimate is dynamic 7 <br /> Chanee caused by external inputs Change primarily occurs naturally <br /> • CO. . i', *'ht: prii iary c.lirnate ' H ghly complex cis➢7,.,r°r➢�_,.il sy,ttr➢r <br /> "control knob' 4 No i:r,~_PIS <br /> • CO. warmin,g is amplii'ied by * Clirnate shifts naturally in <br /> known w+n factors unexpected ways. <br /> • Key driver- large-scale ocean <br /> $ circulations and changes in <br /> cloudiness <br /> There remains a factor of 3 uncertainty in the sensitivity of the climate to increasing <br /> CO2. For radically reducing CO2 emissions to make any sense in terms of the <br /> climate, the climate sensitivity of CO2 would need to be on the high end and natural <br /> climate variability would need to be discounted. On the other hand,if the climate <br />