How can climate be measured?

• Ice Cores

  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)