The temperature trend caused by climate change will continue to be upwards unless carbon emissions begin to fall.
If you look at the long-term temperature trend in the Arctic, it's upward, and if you look at the long-term volume trend, it's downward.
If you left the increase in carbon dioxide out of your calculations, you would see a wobbly but, on average, level temperature trend from the eighteen-nineties to today.
The NASA data released Thursday showed an upward temperature trend of about 0.36 degrees Fahrenheit (0.2 degrees Celsius) per decade over the past 30 years.
This was a disagreement between the temperature trend on the ground, which appeared to be rising, and that further up in the atmosphere, which did not.
It showed a decline in temperature since 2003 which Ward said was contrary to the true measurements, and he said that by leaving out the temperature trend during the 20th century the graph obscured the fact that eight of the 10 hottest years on record have occurred this century.
In the draft version of the IPCC figure, it was simply a visual illusion that the surface temperature data appeared to be warming less slowly than the model projections, even though the measured temperature trend fell within the range of model simulations.
Despite this double cherry picking, ignoring 98percentt of global warming, and despite the sun and volcanoes and ocean cycles all acting in the cooling direction over the past decade, the best climate contrarians can do is find a flat 10-year surface temperature trend.
Assuming a rising temperature trend of 3.5C over 100 years (the Alps are warming faster than the European average), by mid-century the snowline will have risen between 150m and 200m, and by 2100 it will have moved upwards 300m to 400m.
Fig. 5 Maximum temperature trend (left) and Minimum temperature trend (right) in Marsyangdi basin.
Fig. 4 Mean annual temperature trend (1966 2008).
