Friday, February 22, 2013

Four weeks of climate data:
Arctic Circle Region #1

For the Arctic, this is a highly populated area, especially northern Scandinavia.

The blue diamonds are the corners of our region, the upper left diamond is the North Pole. Most of the grid points covered are in the south. All grid points are treated equally if the give at least one reading in a season, but the ones with thicker borders gave readings in all the seasons. The minimum number of readings to qualify is 75%.

Each graph shows the yearly temperature fluctuations. In Winter that line's color is blue. The three other lines are the high median and lowest temperatures in each of our Consistent Oceanic NiƱa Intervals, 1955-1975, 1975-1988, 1988-1999 and 1999-2010. The low temperature line shows a clear warming pattern, every step higher than the last. The median, shown with the red dotted line, is less conclusive with one dip down, a big tick upwards and flat line between this century and last. The high temperatures show a rise in the record warm Winter, but the rise is small.

Conclusion: Rising, but not rising at an increasing rate.

Spring's data is a little more convincing of a rising trend, especially after 1975, and the median argues that it is rising at an increasing rate.

Summer data more or less mimics Spring. This looks like a warming region and the rate jumped by more than usual.

Until 1999, this region looked to be static, but then there was a big jump. I am categorizing this one a warming region and an increasingly warming region.

Later today, Region #2.

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