Bubbles of air are trapped in layers of ice, so cores are drilled to examine their CO2 levels.
What does a larger amount of CO2 found in ice cores mean?
A warmer climate
Micro Fossils
Skeletons of sea creatures are examined, as different species would have survived in and preferred different climates
Weather Stations
Various pieces of equipment used to measure things. Including: thermometers, anemometers (wind speed), barometers (air pressure), rainfall gauges and lux meters (solar energy)
