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Global Warming

Which temperature measuring method most accurately measures global warming?


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Orbiting weather satellites :Since about 1979, each day satellites measure the temperature over about 80% of the globe to an accuracy of about 0.1 degree C. Weather balloons only make measurements at specific locations that are concentrated mostly over land, The real signature of greenhouse warming is not surface temperature but temperature in the middle of the troposphere, about 5 kilometers up.