“Global mean surface temperatures have increased in the range of 0.6 to 1.2°F since the late 19th century. But far more severe warming has taken place over wide regions of northern Eurasia, Canada and Alaska, with temperatures averaging 7 to 10°F warmer in the last 35 years, according to data previously compiled by the NASA Goddard Institute for Space Studies in New York City.”
What they are discussing.
http://data.giss.nasa.gov/cgi-bin/gistemp/nmaps.cgi?year_last=2013&month_last=10&sat=4&sst=3&type=trends&mean_gen=1212&year1=1964&year2=1999&base1=1951&base2=1980&radius=250&pol=reg With smoothing
http://data.giss.nasa.gov/cgi-bin/gistemp/nmaps.cgi?year_last=2013&month_last=10&sat=4&sst=3&type=trends&mean_gen=1212&year1=1964&year2=1999&base1=1951&base2=1980&radius=1200&pol=reg You can easily see the increase from 1964-1999. Short version,Then and now
We know the boreal winters are trending colder over large areas of the NH
There is the essential question. One reason the believers in AGW were sure of a CO2 influence on climate, was the fastest warming was in the arctic, and the boreal winter. This is an expected trend due to the physics of how CO2 is believed to cause warming when it increases. (the other big signature of CO2 is an increase in WV due to the warming, leading to a much greater increase in warming, a positive feedback)
If there is COOLING in the arctic, or the boreal winter, that means something else is causing warming. (this assumes warming is happening with the annual trend of course). If the annual trend is also falling, as well as winters, then it isn’t global warming by any measure.
The reverse would be warming in the arctic and winter, even as the global mean cooled. That would be a sign of AGW still happening.
EVEN IF GLOBAL MEAN TEMPERATURES WERE FLAT OR SLIGHTLY FALLING, if the winters were warming, and the arctic continued to warm, it would be a sign that CO2 is forcing the climate.
Which is why, when the reverse is happening, there is something wrong with the theory.
The DATA SHOWS SOMETHING IS WRONG WITH THE THEORY\
Certainly air pollution could be blamed, massive soot and smog clouds blocking out the sunlight, leading to cooling. (this has been proposed for multiple periods of cooling, or a flat trend). If that was happening, the satellite data of the energy balance at the top of the atmosphere would see it. This is the same data that led to trenberth’s travesty, and the assumption that the “missing heat” is somehow going into the deep oceans.
I know, I know, the true believer will not be swayed by logic, reason, evidence, facts or science. But remember, I don’t give a fuck about them.
I’m more interested in the rare skeptic who can appreciate the above.