NATS 1880 Lecture Notes - Antarctica, Precautionary Principle, Supercomputer
30 Mar 2014
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Document Summary
Earth"s average temperatures are currently on the rise. Topic with a great deal of controversy (esp political) Co2 is a greenhouse gas and human activity is enchaing its concentration. We must determine temperatures accurately on global scales. Must be well calibrated when comparing over time. Dark red and orange is mostly regions near to the arctic regions. Changing the temp can melt the ice and sea levels will rise. Satellite data and ocean temp provide helpful data. Before satellite , temp more difficult to estimate. There are many reason for local temp changes. There are natural climate cycles ( long period changes of earth) Local changes can happen for a variety of reasons. Global averages increased by 0. 8 c in past century. Most of this warming , 0. 6 c occurred in past 30 years. This increase can be larger / smaller depending on the location. Polar regions (glaciers) are warming much more than other regions.
