Indirect methods (proxy measures) indicate that Earth's average temperature has varied many times as much as 10°C in concert with changes in atmospheric concentrations of greenhouse gases.
A drill that extracts cores from trees to study tree rings.
Earth's Hot Past: Prologue to Future Climate?
Study of Earth's deep past leads to look into the future
The magnitude of climate change during Earth's deep...
Antarctic Ice: An 800,000 Year Record of Climate Change provides an extraordinary opportunity for scientists to reconstruct climate events of the past. Scientists have recently...
Climate researchers have reliable temperature records from weather stations dating back to about 1850. To study variations in climate that pre-date the advent of weather...
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