Quote:
Originally Posted by Head416
And how is this measured? Where are the thermometers? Next to factories and power plants? In warm tropical regions? How do you come up with a weighted-average temp for the globe based on location? Or do you just throw out a bunch of thermometers and average the temps? How many are placed in a given region? Is there one in every lat/long grid around the planet? Do they average the high from each day on each thermometer? The low? Do they take temp every hour and average that? Or do they wait until the sun is shining, then take a reading?
We should get a big meat thermometer and measure the earth's temp that way.
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don't know if your initial questions were serious, but methodology includes:
- ships
the "averaging" methodology is all laid out for those who want to dig it out
- buoys
- satellites with special scanners
- ground stations, NWS & others
- for older dates, ice core data and various indicia of glaciation, rock chemistry & etc. have been used