The National Climate Data Center average global temperature graph below demonstrates a method of Scientific Fraud called “Cherry Picking”. Science is supposed to be about finding the truth. Sadly, in Climate Science, the goal has lately been to get the desired POLITICAL result.
These are differences in temperature from some particular value, but the idea is to show changes over time.
Notice that the average temperatures in the period between 1930 and 1990 – while fluctuating – were, on average, constant. Then suddenly, the temperatures showed an abrupt, disturbing upward trend. These numbers are frequently presented as “proof” of Man-made Global Warming.
At the same time the count of weather stations in the average (the red line) abruptly fell from about 5000 to about 300*. Not only that, but the average latitude of the stations involved went from 30° (about that of our own Houston) to 20° (about that of Veracruz, Mexico). I have chosen these two places because they are both near sea level and on the coast of the Gulf of Mexico. In any reasonable mind, these are comparable in climate, with only their latitude being different.
*I had another chart where those numbers were 500 and 30 – those axis labels turned out to have had the last zeroes cropped off.
So, let us examine the average temperatures from Climatemps.com for Houston and Veracruz in (pick a month) – OK, January:
Average January temperature for Houston, Texas………50° Fahrenheit (10° C.)
Average January temperature for Veracruz, Mexico.…..70° Fahrenheit (21° C)
So, does anyone – ANYONE – out there think that the graph below is a valid indication of Global Temperatures over time?