Measuring the Surface Air Temperature (Part 2)

Jennifer Marohasy: Measuring the Surface Air Temperature (Part 2)

So NASA relies on satellites that measure energy radiated from the ice surface and estimate a level of uncertainty in these measurements between 2-3 degree Celsius (read more here).

Given this level of uncertainty I find it extraordinary that NASA can suggest a warming trend of a fraction of a degree over the last 20 years in the following image.