Question
Explain the sources of palaeoclimatic data.
Answer :
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Palaeoclimatic data are essential for understanding past climate variations and for predicting future climate change. Since direct measurements of climate are available only for the past century and a half, scientists rely on proxy data preserved in natural archives to reconstruct earlier climates. One important source is ice cores extracted from polar regions like Antarctica and Greenland. These cores contain trapped air bubbles that preserve ancient atmospheric composition, including greenhouse gases like carbon dioxide and methane, along with isotopic ratios that indicate past temperatures. Another key source is tree rings, which provide annual records
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