GEOG102 Lecture 7: Thin Ice -Simon Lamb Video Notes
29 Oct 2016
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Travelled to antarctica to get a better understanding of climate change and meet scientists studying it (physics to biology: only people allowed to live there are scientists and their support staff. Look for microbes in the ice layering as well (drilling and tunnels) 50 years of testing: one degree change over the 50 years at this base. Typically, a four degree change every 1000 years. Take snow samples to see what the weather was like in the past: looking at isotopes in the snow. Look back 200-1000 years looking at ice cores: very dynamic hotspot for change. Looking at the ice cores components to see what had happened in the past: can release the air in gas bubbles in the ice to see the greenhouse gas emission levels in the past. Typically show a regular pattern of warming and cooling: carbon dioxide levels greatly match the temperature levels. This link is crucial to the understanding of climate change.
