Glaciers and/or the Arctic/Antarctic ice caps.
hi mazz stop stairin at the window
When ice freezes it can freeze gas and other material inside of it and some ice may have been there from thousands of years ago and scientists may want to find out how much carbon dioxide was in the atmosphere then etc.
The cores are drilled from the ice itself - ice sheets in Antarctica and Greenland.
to find out what the composition of the atmosphere was
Ice Cores shows the layers of snow it tell about atmosphere... The Tree show it age in tree rings and shows dryness mostly about the weather...
hi mazz stop stairin at the window
Scientist drill into ice and remove ice cores for study. Scientist analynze air trapped in the ice to learn how the atmosphere has changed. Scientists can develop an accurate history of overall weather patterns over time.
Ice cores are useful for scientists who want to learn about the climate in Antarctica thousands of years ago.
When ice freezes it can freeze gas and other material inside of it and some ice may have been there from thousands of years ago and scientists may want to find out how much carbon dioxide was in the atmosphere then etc.
The cores are drilled from the ice itself - ice sheets in Antarctica and Greenland.
Generally, the data source you're thinking of is ice cores.
analysing cores of ice and rock formations
Ice cores taken by scientists to study the health of planet earth are returned under refrigeration to scientific laboratories on other continents.
Ice cores drilled in Antarctica -- and in many other ice sheets throughout the world -- can be analyzed in the lab for the atmospheric contents present during the period when the ice froze. These data give scientists treasure troves of data that have to do with climate and climate change over tens of thousands of years of Earth's atmospheric history.
You can see it!
Tree cores are small and skinny if it was cold that year.
Ice core is the long cylindrical glacial ice obtained by drilling through glaciers on the high mountains around the world. These cores are retrieved by scientists to review possible records of climate change for almost 100,000 years or more.