Roy Spencer has provided to all of us an extremely valuable website to monitor tropospheric temperature variations and trends using AMSU-A satellite data.
The website is the Daily Earth Temperatures from Satellites. The website writes that
“Daily averaged temperatures of the Earth are measured by the AMSU flying on the NOAA-15 satellite. The satellite passes over most points on the Earth twice per day, at about 7:30 am and 7:30 pm local time. The AMSU measures the average temperature of the atmosphere in different layers from the surface up to about 135,000 feet or 41 kilometers. During global warming, the atmosphere near the surface is supposed to warm at least as fast as the surface warms, while the upper layers are supposed to cool much faster than the surface warms.”
This very user friendly website permits the assessment, for example, of the current global average anomaly at 600 hPa relative to last year’s value (e.g. see for this example). In this example, the global average at this height is 0.33F cooler than last year. It is about 0.15F warmer than the long term average.
The data goes back to 1998, such that we can assess 10 years of tropospheric temperature changes with these important satellite measurements.
If the troposphere is warming, as claimed by the IPCC and CCSP reports, this data provides an ideal data set to test those claims.