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Understanding the difference between direct and proxy measurement is an important piece of your weather knowledge.
- Measurements taken by buoy thermometers of sea surface temperature
- Measurements of oxygen isotope ratios in ice cores that correspond to atmospheric temperatures when the ice was laid down
- Measurements of large and small tree rings that show periods of increased and decreased precipitation
- Satellite data of cloud cover and atmospheric aerosols
- Measurements of daily humidity taken by your school’s weather station
- Measurements of sediment samples that show high levels of volcanic ash from the period sedimentation occurred