NASA’s Arctic Fudge Factory: “More Than Half” Of Claimed Arctic Warming Stems From “Data Adjustments”
As global warming is being used as justification for profound policy shifts, one has to wonder if the one-sided fudging of data that produces the appearance of more warming is a deliberate attempt to deceive and defraud the public.
Is GISS Also Cheating in the Arctic?
By Ed Caryl
Almost four years ago, I wrote A Light In Siberia, where I examined 24 Arctic weather stations. The annual temperature data for those stations was downloaded from GISStemp. In light of all the recent controversy about weather station data corruption by “adjustments”, I decided to reacquire the GISS data for 19 of those stations for which I had kept the annual figures, and check for changes. There is also the matter of divergence, especially in the Arctic latitudes, between GISS LOTI and the satellite temperature readings. I examined this issue in this article back in November.
Is all that Arctic warming real?
Figure 1 is the annual temperature anomaly plots for land and ocean north of 60°.
I won’t bore you with individual 19 plots of the changes (see Figure 3), but here is one sample that my be illustrative, from Barrow Alaska. The station is at the airport, across the runway from the terminal and hangar areas, but close to the asphalt paved runway. There may have been a move in 1989, giving an excuse for the large discontinuity at that time, but there is no excuse for the constant positive correction, in the same direction as the well-documented urban heat island temperature increase at Barrow.
Figure 2 is a plot of GISS annual temperature for Barrow, Alaska, downloaded in August of 2010 and June of 2014, and the difference between these two sets of data. This is just the adjustment that has been applied in the last 3 years and 9 months.
Figure 3 is a plot of all the adjustments for all 19 stations.
The difference plots for most of the other stations look like noise, with occasional large steps, but the adjustments are nearly always warmer for the last half of the 20th century. The next plot is the average.
Figure 4 is a plot of all the adjustments that have been applied by GISS in the last three years and nine months for 19 Arctic stations averaged together.
Again, these are just the “adjustments”or “corrections” that GISS has applied in the last three years and nine months to the 19 Arctic stations. I have no way of knowing what they did before August of 2010.
Note the trend line in Figure 4. These recent changes to the data have resulted in more than half of all the warming that has supposedly taken place since the bottom of the Little Ice Age and a third of the difference between GISS LOTI and RSS seen in Figure 1.
We may never know what the real temperature change has been.