A few weeks ago, climate criminal Michael Mann (who knows nothing about the subject) said that satellite temperatures are not as reliable as surface temperatures.
According to Dr. Michael Mann (Penn State), the satellite temperature record has actually been subject to more adjustments than the surface record. Mann also states that the global satellite temperature record has been shown to have a bias of showing too little warming.
Thus is a flat out lie. The surface temperature record has been adjusted to the point of being farcical.
NASA has doubled 1880-2000 warming since 2001 by eliminating rural stations and homogenizing UHI infected urban stations.
The entire US warming trend over the past century is due to adjustments.
Dr. John Christy of the University of Alabama at Huntsville is an actual expert on satellite temperatures, and he pulverized Mann’s fraud in Congress this week.
First, the claim is made the satellites do not measure temperature. In reality, the sensors on satellites measure temperature by emitted radiation – the same method that a physician uses to measure your body temperature to high precision using an ear probe. Atmospheric oxygen emits microwaves, the intensity of which is directly proportional to the temperature of the oxygen, and thus the atmosphere. That the satellites measure temperature is evident by the following chart which compares our UAH satellite data with temperatures calculated from balloon thermistors. As an aside, most surface temperature measurements are indirect, using electronic resistance.
Michael Mann has been shown over and over again to be an embarrassment to the profession, but he says the things that progressives want to hear. So they listen to him and ignore actual scientists.