[Tell It Right]

More evidence that the earth is coming out of an ice age.

Agreed.

[zeestephen]

Great temperature chart.

Thanks for posting it.

Love the tiny green mark that designates the Thermometer Era.

Also, there have been three distinct kinds of thermometers used since the 1850s, and no clear way to distinguish how the 1-2 degree F measurement variation between them should be resolved in the historical record.

Also, most developed countries with extensive contemporary temperature stations use airport temperatures to calculate the average temperature.

The reason is valid - the exact temp at an airport is vital safety information for pilots.

Unfortunately, this hugely exaggerates the Heat Island effect, especially at night, when compared to lower temps just a couple miles away from the airport.